{
  "adi_asthma": {
    "ci": [
      0.48,
      0.58
    ],
    "ciLevel": 0.95,
    "display": "+0.53",
    "estimand": "population-weighted correlation of the tract's modeled prevalence of current asthma among adults with the ADI national rank, county-cluster bootstrap interval",
    "n": 80038,
    "nUnit": "tracts",
    "note": "PLACES prevalence is a model-based estimate from survey responses, so it is not a measured rate.",
    "period": "PLACES 2024 release (BRFSS 2022); EJScreen 2024; ACS 2019-2023",
    "population": "residents of tracts in the PCA with a PLACES estimate for current asthma",
    "source": "places",
    "unit": "correlation coefficient",
    "value": 0.529493,
    "weights": "ACS 2019-2023 tract population"
  },
  "alt_adi_least": {
    "ci": [
      69,
      80
    ],
    "ciLevel": 0.95,
    "display": "75",
    "estimand": "population-weighted mean of the tract's traffic-proximity national percentile; 95% intervals from a bootstrap over counties",
    "n": 7443,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the least deprived tenth of tracts ranked by Area Deprivation Index, among the tracts with all four rankings",
    "source": "ejscreen",
    "unit": "Mean national percentile of the tract (0 to 100)",
    "value": 75.1916,
    "weights": "ACS 2019-2023 tract population"
  },
  "alt_adi_most": {
    "ci": [
      35,
      41
    ],
    "ciLevel": 0.95,
    "display": "38",
    "estimand": "population-weighted mean of the tract's traffic-proximity national percentile; 95% intervals from a bootstrap over counties",
    "n": 7529,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the most deprived tenth of tracts ranked by Area Deprivation Index, among the tracts with all four rankings",
    "source": "ejscreen",
    "unit": "Mean national percentile of the tract (0 to 100)",
    "value": 38.3715,
    "weights": "ACS 2019-2023 tract population"
  },
  "alt_adi_rho": {
    "display": "−0.96",
    "estimand": "Spearman rank correlation between bin order and bin mean, each bin counted once",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the bins of tracts ranked by Area Deprivation Index",
    "source": "ejscreen",
    "unit": "rank correlation",
    "value": -0.963636,
    "weights": "each bin counted once"
  },
  "alt_degree_least": {
    "ci": [
      65,
      72
    ],
    "ciLevel": 0.95,
    "display": "69",
    "estimand": "population-weighted mean of the tract's traffic-proximity national percentile; 95% intervals from a bootstrap over counties",
    "n": 7505,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the least deprived tenth of tracts ranked by Bachelor's degree share, among the tracts with all four rankings",
    "source": "ejscreen",
    "unit": "Mean national percentile of the tract (0 to 100)",
    "value": 68.5875,
    "weights": "ACS 2019-2023 tract population"
  },
  "alt_degree_most": {
    "ci": [
      42,
      53
    ],
    "ciLevel": 0.95,
    "display": "48",
    "estimand": "population-weighted mean of the tract's traffic-proximity national percentile; 95% intervals from a bootstrap over counties",
    "n": 7509,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the most deprived tenth of tracts ranked by Bachelor's degree share, among the tracts with all four rankings",
    "source": "ejscreen",
    "unit": "Mean national percentile of the tract (0 to 100)",
    "value": 47.644,
    "weights": "ACS 2019-2023 tract population"
  },
  "alt_degree_rho": {
    "display": "−0.87",
    "estimand": "Spearman rank correlation between bin order and bin mean, each bin counted once",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the bins of tracts ranked by Bachelor's degree share",
    "source": "ejscreen",
    "unit": "rank correlation",
    "value": -0.866667,
    "weights": "each bin counted once"
  },
  "alt_income_least": {
    "ci": [
      58,
      66
    ],
    "ciLevel": 0.95,
    "display": "62",
    "estimand": "population-weighted mean of the tract's traffic-proximity national percentile; 95% intervals from a bootstrap over counties",
    "n": 7507,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the least deprived tenth of tracts ranked by Median household income, among the tracts with all four rankings",
    "source": "ejscreen",
    "unit": "Mean national percentile of the tract (0 to 100)",
    "value": 61.9446,
    "weights": "ACS 2019-2023 tract population"
  },
  "alt_income_most": {
    "ci": [
      46,
      53
    ],
    "ciLevel": 0.95,
    "display": "50",
    "estimand": "population-weighted mean of the tract's traffic-proximity national percentile; 95% intervals from a bootstrap over counties",
    "n": 7506,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the most deprived tenth of tracts ranked by Median household income, among the tracts with all four rankings",
    "source": "ejscreen",
    "unit": "Mean national percentile of the tract (0 to 100)",
    "value": 49.7715,
    "weights": "ACS 2019-2023 tract population"
  },
  "alt_income_rho": {
    "display": "−0.70",
    "estimand": "Spearman rank correlation between bin order and bin mean, each bin counted once",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the bins of tracts ranked by Median household income",
    "source": "ejscreen",
    "unit": "rank correlation",
    "value": -0.69697,
    "weights": "each bin counted once"
  },
  "alt_n_places": {
    "display": "75,058",
    "estimand": "count of tracts in the common sample of the ranking comparison",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with the outcome and all four rankings",
    "source": "ejscreen",
    "unit": "tracts",
    "value": 75058,
    "weights": "none (full count)"
  },
  "alt_rho_cut": {
    "display": "0.9",
    "estimand": "threshold between a steady and an uneven gradient",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the rule for changed gradients (docs/RANKING_SWITCH_RULE.md)",
    "source": "ejscreen",
    "unit": "absolute rank correlation",
    "value": 0.9,
    "weights": "none (a fixed rule)"
  },
  "alt_rho_margin": {
    "display": "0.1",
    "estimand": "smallest move in the rank correlation that counts as a change of shape",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the rule for changed gradients (docs/RANKING_SWITCH_RULE.md)",
    "source": "ejscreen",
    "unit": "absolute rank correlation",
    "value": 0.1,
    "weights": "none (a fixed rule)"
  },
  "alt_std_least": {
    "ci": [
      58,
      65
    ],
    "ciLevel": 0.95,
    "display": "62",
    "estimand": "population-weighted mean of the tract's traffic-proximity national percentile; 95% intervals from a bootstrap over counties",
    "n": 7505,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the least deprived tenth of tracts ranked by Standardized index, among the tracts with all four rankings",
    "source": "ejscreen",
    "unit": "Mean national percentile of the tract (0 to 100)",
    "value": 61.8189,
    "weights": "ACS 2019-2023 tract population"
  },
  "alt_std_most": {
    "ci": [
      55,
      64
    ],
    "ciLevel": 0.95,
    "display": "59",
    "estimand": "population-weighted mean of the tract's traffic-proximity national percentile; 95% intervals from a bootstrap over counties",
    "n": 7506,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the most deprived tenth of tracts ranked by Standardized index, among the tracts with all four rankings",
    "source": "ejscreen",
    "unit": "Mean national percentile of the tract (0 to 100)",
    "value": 59.2262,
    "weights": "ACS 2019-2023 tract population"
  },
  "alt_std_rho": {
    "display": "−0.31",
    "estimand": "Spearman rank correlation between bin order and bin mean, each bin counted once",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "the bins of tracts ranked by Standardized index",
    "source": "ejscreen",
    "unit": "rank correlation",
    "value": -0.309091,
    "weights": "each bin counted once"
  },
  "asth_adi_t1": {
    "ci": [
      8.9,
      9.3
    ],
    "ciLevel": 0.95,
    "display": "9.0%",
    "estimand": "population-weighted mean of the tract's modeled crude prevalence of current asthma among adults, within a twentieth of tracts, county-cluster bootstrap interval",
    "n": 4164,
    "nUnit": "tracts",
    "note": "",
    "period": "PLACES 2024 release (BRFSS 2022)",
    "population": "residents of tracts in the least deprived twentieth of tracts on the ADI national rank",
    "source": "places",
    "unit": "percent of adults with current asthma (modeled)",
    "value": 9.04918,
    "weights": "ACS 2019-2023 tract population"
  },
  "asth_adi_t20": {
    "ci": [
      12.4,
      12.9
    ],
    "ciLevel": 0.95,
    "display": "12.7%",
    "estimand": "population-weighted mean of the tract's modeled crude prevalence of current asthma among adults, within a twentieth of tracts, county-cluster bootstrap interval",
    "n": 3947,
    "nUnit": "tracts",
    "note": "",
    "period": "PLACES 2024 release (BRFSS 2022)",
    "population": "residents of tracts in the most deprived twentieth of tracts on the ADI national rank",
    "source": "places",
    "unit": "percent of adults with current asthma (modeled)",
    "value": 12.6756,
    "weights": "ACS 2019-2023 tract population"
  },
  "asth_ldp_t1": {
    "ci": [
      9.5,
      9.9
    ],
    "ciLevel": 0.95,
    "display": "9.7%",
    "estimand": "population-weighted mean of the tract's modeled crude prevalence of current asthma among adults, within a twentieth of tracts, county-cluster bootstrap interval",
    "n": 4736,
    "nUnit": "tracts",
    "note": "",
    "period": "PLACES 2024 release (BRFSS 2022)",
    "population": "residents of tracts in the lowest twentieth of tracts on the lead-paint percentile",
    "source": "places",
    "unit": "percent of adults with current asthma (modeled)",
    "value": 9.72011,
    "weights": "ACS 2019-2023 tract population"
  },
  "asth_ldp_t20": {
    "ci": [
      10.6,
      11.5
    ],
    "ciLevel": 0.95,
    "display": "11.0%",
    "estimand": "population-weighted mean of the tract's modeled crude prevalence of current asthma among adults, within a twentieth of tracts, county-cluster bootstrap interval",
    "n": 4216,
    "nUnit": "tracts",
    "note": "",
    "period": "PLACES 2024 release (BRFSS 2022)",
    "population": "residents of tracts in the highest twentieth of tracts on the lead-paint percentile",
    "source": "places",
    "unit": "percent of adults with current asthma (modeled)",
    "value": 10.9947,
    "weights": "ACS 2019-2023 tract population"
  },
  "asth_pc1_t1": {
    "ci": [
      11.1,
      11.3
    ],
    "ciLevel": 0.95,
    "display": "11.2%",
    "estimand": "population-weighted mean of the tract's modeled crude prevalence of current asthma among adults, within a twentieth of tracts, county-cluster bootstrap interval",
    "n": 4033,
    "nUnit": "tracts",
    "note": "",
    "period": "PLACES 2024 release (BRFSS 2022)",
    "population": "residents of tracts in the lowest twentieth of tracts on the urban-industrial component",
    "source": "places",
    "unit": "percent of adults with current asthma (modeled)",
    "value": 11.1698,
    "weights": "ACS 2019-2023 tract population"
  },
  "asth_pc1_t20": {
    "ci": [
      9.7,
      10.5
    ],
    "ciLevel": 0.95,
    "display": "9.9%",
    "estimand": "population-weighted mean of the tract's modeled crude prevalence of current asthma among adults, within a twentieth of tracts, county-cluster bootstrap interval",
    "n": 4034,
    "nUnit": "tracts",
    "note": "",
    "period": "PLACES 2024 release (BRFSS 2022)",
    "population": "residents of tracts in the highest twentieth of tracts on the urban-industrial component",
    "source": "places",
    "unit": "percent of adults with current asthma (modeled)",
    "value": 9.87401,
    "weights": "ACS 2019-2023 tract population"
  },
  "black_share_all": {
    "display": "12.1%",
    "estimand": "population-weighted mean of the tract share of residents who are Black or African American alone (of any ethnicity)",
    "n": 83008,
    "nUnit": "tracts",
    "note": "",
    "period": "ACS 2019-2023",
    "population": "residents of the tracts in the analysis",
    "source": "acs",
    "unit": "percent of residents",
    "value": 12.0938,
    "weights": "ACS 2019-2023 tract population"
  },
  "corridor_bronx": {
    "display": "+1.45",
    "estimand": "population-weighted county mean of the tract component 1 score (scaled to unit variance across tracts)",
    "n": 346,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of Bronx County, New York",
    "source": "ejscreen",
    "unit": "standard deviations of the tract-level component 1 score",
    "value": 1.44975,
    "weights": "ACS 2019-2023 tract population"
  },
  "corridor_hudson": {
    "display": "+1.67",
    "estimand": "population-weighted county mean of the tract component 1 score (scaled to unit variance across tracts)",
    "n": 182,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of Hudson County, New Jersey",
    "source": "ejscreen",
    "unit": "standard deviations of the tract-level component 1 score",
    "value": 1.67103,
    "weights": "ACS 2019-2023 tract population"
  },
  "corridor_la_rank": {
    "display": "6",
    "estimand": "rank of Los Angeles County by population-weighted county mean of the tract component 1 score",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "mapped counties",
    "source": "ejscreen",
    "unit": "rank among mapped counties (1 = highest mean score)",
    "value": 6,
    "weights": "none (rank)"
  },
  "corridor_newyork": {
    "display": "+1.58",
    "estimand": "population-weighted county mean of the tract component 1 score (scaled to unit variance across tracts)",
    "n": 300,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of New York County, New York",
    "source": "ejscreen",
    "unit": "standard deviations of the tract-level component 1 score",
    "value": 1.57882,
    "weights": "ACS 2019-2023 tract population"
  },
  "corridor_q50": {
    "display": "−1.2",
    "estimand": "median over mapped counties of the population-weighted county mean of the tract component 1 score (each county counts once)",
    "n": 3094,
    "nUnit": "counties",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "mapped counties",
    "source": "ejscreen",
    "unit": "standard deviations of the tract-level component 1 score",
    "value": -1.15842,
    "weights": "none (each county counts once)"
  },
  "corridor_stlouis": {
    "display": "+1.50",
    "estimand": "population-weighted county mean of the tract component 1 score (scaled to unit variance across tracts)",
    "n": 104,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of the independent city of St. Louis, Missouri",
    "source": "ejscreen",
    "unit": "standard deviations of the tract-level component 1 score",
    "value": 1.5001,
    "weights": "ACS 2019-2023 tract population"
  },
  "corridor_top": {
    "display": "+1.69",
    "estimand": "population-weighted county mean of the tract component 1 score (scaled to unit variance across tracts)",
    "n": 1318,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of the county with the highest mean score",
    "source": "ejscreen",
    "unit": "standard deviations of the tract-level component 1 score",
    "value": 1.68736,
    "weights": "ACS 2019-2023 tract population"
  },
  "dslpm_adi": {
    "ci": [
      -0.45,
      -0.3
    ],
    "ciLevel": 0.95,
    "display": "−0.38",
    "estimand": "population-weighted correlation of the tract Diesel PM national percentile with the ADI national rank, county-cluster bootstrap interval",
    "n": 82198,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a Diesel PM percentile and an ADI rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.377092,
    "weights": "ACS 2019-2023 tract population"
  },
  "dslpm_adi_metro": {
    "ci": [
      -0.36,
      -0.19
    ],
    "ciLevel": 0.95,
    "display": "−0.28",
    "estimand": "population-weighted correlation of the tract Diesel PM national percentile with the ADI national rank, metropolitan tracts only, county-cluster bootstrap interval",
    "n": 66593,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of metropolitan tracts with a Diesel PM percentile and the ADI national rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.280257,
    "weights": "ACS 2019-2023 tract population"
  },
  "dslpm_adi_within": {
    "ci": [
      0.15,
      0.23
    ],
    "ciLevel": 0.95,
    "display": "+0.19",
    "estimand": "population-weighted correlation of the tract Diesel PM national percentile with the ADI national rank, after removing each county's population-weighted mean from both (counties with at least 5 tracts), county-cluster bootstrap interval",
    "n": 79730,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have a Diesel PM percentile and the ADI national rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.188297,
    "weights": "ACS 2019-2023 tract population"
  },
  "dslpm_black": {
    "ci": [
      0.13,
      0.23
    ],
    "ciLevel": 0.95,
    "display": "+0.18",
    "estimand": "population-weighted correlation of the tract Diesel PM national percentile with the tract's Black alone share, county-cluster bootstrap interval",
    "n": 82998,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a Diesel PM percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.178596,
    "weights": "ACS 2019-2023 tract population"
  },
  "dslpm_hisp": {
    "ci": [
      0.26,
      0.41
    ],
    "ciLevel": 0.95,
    "display": "+0.34",
    "estimand": "population-weighted correlation of the tract Diesel PM national percentile with the tract's Hispanic or Latino share, county-cluster bootstrap interval",
    "n": 82998,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a Diesel PM percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.339714,
    "weights": "ACS 2019-2023 tract population"
  },
  "dslpm_metro_d1": {
    "ci": [
      64,
      76
    ],
    "ciLevel": 0.95,
    "display": "71",
    "estimand": "population-weighted mean of the tract Diesel PM national percentile, metropolitan tracts only, ADI deciles of all tracts, county-cluster bootstrap interval",
    "n": 7879,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of metropolitan tracts (RUCA codes 1 to 3) in ADI decile 1 of all tracts",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 70.7607,
    "weights": "ACS 2019-2023 tract population"
  },
  "dslpm_metro_d9": {
    "ci": [
      44,
      50
    ],
    "ciLevel": 0.95,
    "display": "47",
    "estimand": "population-weighted mean of the tract Diesel PM national percentile, metropolitan tracts only, ADI deciles of all tracts, county-cluster bootstrap interval",
    "n": 4817,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of metropolitan tracts (RUCA codes 1 to 3) in ADI decile 9 of all tracts",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 47.4112,
    "weights": "ACS 2019-2023 tract population"
  },
  "heavy_black_hi": {
    "ci": [
      23,
      40
    ],
    "ciLevel": 0.95,
    "display": "32%",
    "estimand": "population-weighted share of residents in tracts with three or more of the five air hazards in the top quarter, county-cluster bootstrap interval",
    "n": 8298,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 10 of the Black alone share",
    "source": "ejscreen",
    "unit": "percent of residents living in tracts with three or more stacked hazards",
    "value": 31.9747,
    "weights": "ACS 2019-2023 tract population"
  },
  "heavy_black_lo": {
    "ci": [
      6,
      15
    ],
    "ciLevel": 0.95,
    "display": "10%",
    "estimand": "population-weighted share of residents in tracts with three or more of the five air hazards in the top quarter, county-cluster bootstrap interval",
    "n": 8809,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 1 of the Black alone share",
    "source": "ejscreen",
    "unit": "percent of residents living in tracts with three or more stacked hazards",
    "value": 10.1685,
    "weights": "ACS 2019-2023 tract population"
  },
  "heavy_hisp_hi": {
    "ci": [
      35,
      61
    ],
    "ciLevel": 0.95,
    "display": "49%",
    "estimand": "population-weighted share of residents in tracts with three or more of the five air hazards in the top quarter, county-cluster bootstrap interval",
    "n": 8299,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 10 of the Hispanic or Latino share",
    "source": "ejscreen",
    "unit": "percent of residents living in tracts with three or more stacked hazards",
    "value": 48.8362,
    "weights": "ACS 2019-2023 tract population"
  },
  "heavy_hisp_lo": {
    "ci": [
      4,
      10
    ],
    "ciLevel": 0.95,
    "display": "6%",
    "estimand": "population-weighted share of residents in tracts with three or more of the five air hazards in the top quarter, county-cluster bootstrap interval",
    "n": 8295,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 1 of the Hispanic or Latino share",
    "source": "ejscreen",
    "unit": "percent of residents living in tracts with three or more stacked hazards",
    "value": 6.43873,
    "weights": "ACS 2019-2023 tract population"
  },
  "heavy_min": {
    "display": "3",
    "estimand": "a tract is heavily stacked when this many of the five hazards or more are in the top quarter; a definition",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts",
    "source": "ejscreen",
    "unit": "air hazards",
    "value": 3,
    "weights": "none (definition)"
  },
  "hisp_share_all": {
    "display": "19.0%",
    "estimand": "population-weighted mean of the tract share of residents who are Hispanic or Latino (of any race)",
    "n": 83008,
    "nUnit": "tracts",
    "note": "",
    "period": "ACS 2019-2023",
    "population": "residents of the tracts in the analysis",
    "source": "acs",
    "unit": "percent of residents",
    "value": 19.0479,
    "weights": "ACS 2019-2023 tract population"
  },
  "holc_cover_min": {
    "display": "50%",
    "estimand": "a tract is graded when polygons graded A to D cover at least this share of its area; a definition",
    "note": "",
    "period": "HOLC maps of 1935 to 1940",
    "population": "2020 tracts",
    "source": "holc",
    "unit": "percent of the tract's area",
    "value": 50,
    "weights": "none (definition)"
  },
  "ldpnt_adi": {
    "ci": [
      0.06,
      0.26
    ],
    "ciLevel": 0.95,
    "display": "+0.16",
    "estimand": "population-weighted correlation of the tract Lead paint (housing built before 1960) national percentile with the ADI national rank, county-cluster bootstrap interval",
    "n": 82198,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a Lead paint (housing built before 1960) percentile and an ADI rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.160253,
    "weights": "ACS 2019-2023 tract population"
  },
  "ldpnt_asthma": {
    "ci": [
      0.2,
      0.34
    ],
    "ciLevel": 0.95,
    "display": "+0.27",
    "estimand": "population-weighted correlation of the tract's modeled prevalence of current asthma among adults with the lead-paint percentile, county-cluster bootstrap interval",
    "n": 80674,
    "nUnit": "tracts",
    "note": "PLACES prevalence is a model-based estimate from survey responses, so it is not a measured rate.",
    "period": "PLACES 2024 release (BRFSS 2022); EJScreen 2024; ACS 2019-2023",
    "population": "residents of tracts in the PCA with a PLACES estimate for current asthma",
    "source": "places",
    "unit": "correlation coefficient",
    "value": 0.268829,
    "weights": "ACS 2019-2023 tract population"
  },
  "map_cover_min": {
    "display": "50%",
    "estimand": "a county is mapped when residents of tracts with all 13 indicators are at least this share of its residents; a definition",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "counties",
    "source": "ejscreen",
    "unit": "percent of the county's residents",
    "value": 50,
    "weights": "none (definition)"
  },
  "n_adi_missing": {
    "display": "810",
    "estimand": "count of tracts with a missing ADI national rank",
    "note": "",
    "period": "ADI 2023",
    "population": "tracts in the analysis with no ADI rank (every block group suppressed)",
    "source": "adi",
    "unit": "tracts",
    "value": 810,
    "weights": "none (full count)"
  },
  "n_air_adi_neg": {
    "display": "4",
    "estimand": "count of air indicators whose correlation with the ADI national rank is negative with an interval that excludes zero under the county bootstrap and under the bootstrap that redraws states",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "EJScreen indicators in the group: the 6 air indicators",
    "source": "ejscreen",
    "unit": "indicators",
    "value": 4,
    "weights": "none (count of indicators)"
  },
  "n_air_black_pos": {
    "display": "4",
    "estimand": "count of air indicators whose correlation with the Black alone share is positive with an interval that excludes zero under the county bootstrap and under the bootstrap that redraws states",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "EJScreen indicators in the group: the 6 air indicators",
    "source": "ejscreen",
    "unit": "indicators",
    "value": 4,
    "weights": "none (count of indicators)"
  },
  "n_air_hisp_pos": {
    "display": "5",
    "estimand": "count of air indicators whose correlation with the Hispanic or Latino share is positive with an interval that excludes zero under the county bootstrap and under the bootstrap that redraws states",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "EJScreen indicators in the group: the 6 air indicators",
    "source": "ejscreen",
    "unit": "indicators",
    "value": 5,
    "weights": "none (count of indicators)"
  },
  "n_air_ind": {
    "display": "6",
    "estimand": "number of air indicators; a definition",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "EJScreen air indicators (PM₂.₅, ozone, diesel PM, NO₂, traffic proximity, toxic releases to air)",
    "source": "ejscreen",
    "unit": "indicators",
    "value": 6,
    "weights": "none (definition)"
  },
  "n_between_counties": {
    "display": "3,095",
    "estimand": "count of counties in the county-level correlation",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "counties with at least one tract that has a traffic-proximity percentile and an ADI rank",
    "source": "ejscreen",
    "unit": "counties",
    "value": 3095,
    "weights": "none (full count)"
  },
  "n_black_zero": {
    "display": "8,815",
    "estimand": "count of tracts with a Black alone share of zero",
    "note": "",
    "period": "ACS 2019-2023",
    "population": "tracts in the analysis with no Black alone residents in the ACS 2019-2023 estimate",
    "source": "acs",
    "unit": "tracts",
    "value": 8815,
    "weights": "none (full count)"
  },
  "n_indicators": {
    "display": "13",
    "estimand": "number of national-percentile indicators entering the correlation strip and the PCA",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "EJScreen environmental indicators in the staged extract",
    "source": "ejscreen",
    "unit": "indicators",
    "value": 13,
    "weights": "none (definition)"
  },
  "n_map_counties": {
    "display": "3,094",
    "estimand": "count of mapped counties",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "counties and county equivalents on the map sprite with a component 1 score",
    "source": "ejscreen",
    "unit": "counties",
    "value": 3094,
    "weights": "none (full count)"
  },
  "n_map_nodata": {
    "display": "49",
    "estimand": "count of map units with no component 1 score",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "counties and county equivalents on the map sprite without a score",
    "source": "ejscreen",
    "unit": "counties",
    "value": 49,
    "weights": "none (full count)"
  },
  "n_no_pm25": {
    "display": "1,524",
    "estimand": "count of tracts with a missing PM₂.₅ percentile",
    "note": "Missing is not zero: EPA's fused air-quality surfaces cover the contiguous states and the District of Columbia.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with a positive population and no PM₂.₅ or ozone value (all in Alaska, Hawaii and Puerto Rico), left out of the analysis",
    "source": "ejscreen",
    "unit": "tracts",
    "value": 1524,
    "weights": "none (full count)"
  },
  "n_old_adi_pos": {
    "display": "1",
    "estimand": "count of old-housing and infrastructure indicators whose correlation with the ADI national rank is positive with an interval that excludes zero under the county bootstrap and under the bootstrap that redraws states",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "EJScreen indicators in the group: the 3 old-housing and infrastructure indicators",
    "source": "ejscreen",
    "unit": "indicators",
    "value": 1,
    "weights": "none (count of indicators)"
  },
  "n_old_ind": {
    "display": "3",
    "estimand": "number of old-housing and infrastructure indicators; a definition",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "EJScreen old-housing and infrastructure indicators (lead paint, storage tanks, drinking water)",
    "source": "ejscreen",
    "unit": "indicators",
    "value": 3,
    "weights": "none (definition)"
  },
  "n_pca": {
    "display": "80,754",
    "estimand": "count of tracts in the PCA",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts in the analysis with all 13 percentiles (drinking-water violations are missing for some tracts)",
    "source": "ejscreen",
    "unit": "tracts",
    "value": 80754,
    "weights": "none (each tract counts once)"
  },
  "n_prox_ind": {
    "display": "4",
    "estimand": "number of proximity and discharge indicators; a definition",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "EJScreen proximity and discharge indicators (Superfund sites, risk-management facilities, hazardous-waste facilities, wastewater discharge)",
    "source": "ejscreen",
    "unit": "indicators",
    "value": 4,
    "weights": "none (definition)"
  },
  "n_ptraf_adi": {
    "display": "82,198",
    "estimand": "count of tracts in the correlation of the traffic percentile with the ADI rank",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with a traffic-proximity percentile and an ADI rank (tracts without an ADI rank are left out)",
    "source": "ejscreen",
    "unit": "tracts",
    "value": 82198,
    "weights": "none (full count)"
  },
  "n_ptraf_adi_within": {
    "display": "79,730",
    "estimand": "count of tracts in the within-county correlation of the traffic percentile with the ADI rank",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with a traffic-proximity percentile and an ADI rank in counties with at least 5 such tracts",
    "source": "ejscreen",
    "unit": "tracts",
    "value": 79730,
    "weights": "none (full count)"
  },
  "n_stack_tracts": {
    "display": "82,993",
    "estimand": "count of tracts with PM₂.₅, diesel PM, NO₂, traffic and toxic-release percentiles",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts in the analysis with all five air percentiles",
    "source": "ejscreen",
    "unit": "tracts",
    "value": 82993,
    "weights": "none (full count)"
  },
  "n_tracts": {
    "display": "83,008",
    "estimand": "count of tracts in the analysis",
    "note": "Statistics about one indicator use the tracts that have a value for it; each correlation lists its own count.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "2020 census tracts in the contiguous states and the District of Columbia with an EJScreen record and a positive 2019-2023 population",
    "source": "ejscreen",
    "unit": "tracts",
    "value": 83008,
    "weights": "none (full count)"
  },
  "no2_adi": {
    "ci": [
      -0.27,
      -0.1
    ],
    "ciLevel": 0.95,
    "display": "−0.18",
    "estimand": "population-weighted correlation of the tract NO₂ national percentile with the ADI national rank, county-cluster bootstrap interval",
    "n": 82193,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a NO₂ percentile and an ADI rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.18227,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_adi_metro": {
    "ci": [
      -0.17,
      0
    ],
    "ciLevel": 0.95,
    "display": "−0.09",
    "estimand": "population-weighted correlation of the tract NO₂ national percentile with the ADI national rank, metropolitan tracts only, county-cluster bootstrap interval",
    "n": 66588,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of metropolitan tracts with a NO₂ percentile and the ADI national rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.0850339,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_adi_within": {
    "ci": [
      0.25,
      0.31
    ],
    "ciLevel": 0.95,
    "display": "+0.28",
    "estimand": "population-weighted correlation of the tract NO₂ national percentile with the ADI national rank, after removing each county's population-weighted mean from both (counties with at least 5 tracts), county-cluster bootstrap interval",
    "n": 79725,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have a NO₂ percentile and the ADI national rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.278613,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_black": {
    "ci": [
      0.1,
      0.19
    ],
    "ciLevel": 0.95,
    "display": "+0.14",
    "estimand": "population-weighted correlation of the tract NO₂ national percentile with the tract's Black alone share, county-cluster bootstrap interval",
    "n": 83003,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a NO₂ percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.144655,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_black_d1": {
    "ci": [
      35,
      41
    ],
    "ciLevel": 0.95,
    "display": "38",
    "estimand": "population-weighted mean of the tract NO₂ national percentile within a decile of tracts by Black alone share, county-cluster bootstrap interval",
    "n": 8813,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 1 of the Black alone share of residents (deciles hold equal numbers of tracts)",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 37.8077,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_black_d10": {
    "ci": [
      53,
      63
    ],
    "ciLevel": 0.95,
    "display": "58",
    "estimand": "population-weighted mean of the tract NO₂ national percentile within a decile of tracts by Black alone share, county-cluster bootstrap interval",
    "n": 8301,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 10 of the Black alone share of residents (deciles hold equal numbers of tracts)",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 58.3456,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_black_within": {
    "ci": [
      0.14,
      0.21
    ],
    "ciLevel": 0.95,
    "display": "+0.17",
    "estimand": "population-weighted correlation of the tract NO₂ national percentile with the tract's Black alone share after removing each county's population-weighted mean from both, county-cluster bootstrap interval",
    "n": 80548,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have a NO₂ percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.173623,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_hisp": {
    "ci": [
      0.35,
      0.46
    ],
    "ciLevel": 0.95,
    "display": "+0.40",
    "estimand": "population-weighted correlation of the tract NO₂ national percentile with the tract's Hispanic or Latino share, county-cluster bootstrap interval",
    "n": 83003,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a NO₂ percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.40183,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_hisp_d1": {
    "ci": [
      30,
      36
    ],
    "ciLevel": 0.95,
    "display": "33",
    "estimand": "population-weighted mean of the tract NO₂ national percentile within a decile of tracts by Hispanic or Latino share, county-cluster bootstrap interval",
    "n": 8300,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 1 of the Hispanic or Latino share of residents (deciles hold equal numbers of tracts)",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 32.6357,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_hisp_d10": {
    "ci": [
      68,
      76
    ],
    "ciLevel": 0.95,
    "display": "73",
    "estimand": "population-weighted mean of the tract NO₂ national percentile within a decile of tracts by Hispanic or Latino share, county-cluster bootstrap interval",
    "n": 8300,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 10 of the Hispanic or Latino share of residents (deciles hold equal numbers of tracts)",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 72.6221,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_hisp_within": {
    "ci": [
      0.21,
      0.26
    ],
    "ciLevel": 0.95,
    "display": "+0.23",
    "estimand": "population-weighted correlation of the tract NO₂ national percentile with the tract's Hispanic or Latino share after removing each county's population-weighted mean from both, county-cluster bootstrap interval",
    "n": 80548,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have a NO₂ percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.232819,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_joint_adi": {
    "ci": [
      0.13,
      0.19
    ],
    "ciLevel": 0.95,
    "display": "+0.16",
    "estimand": "coefficient on the ADI national rank in a population-weighted regression of the tract NO₂ national percentile on the ADI national rank, the Hispanic or Latino share, the Black alone share, with each county's population-weighted mean removed from every variable and each variable scaled to a standard deviation of one, errors clustered on county",
    "n": 79725,
    "nUnit": "tracts",
    "note": "A descriptive association within counties, not a causal estimate.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have every variable in the model",
    "source": "ejscreen",
    "unit": "within-county standard deviations of the NO₂ percentile per within-county standard deviation of the predictor",
    "value": 0.160249,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_joint_black": {
    "ci": [
      0.08,
      0.16
    ],
    "ciLevel": 0.95,
    "display": "+0.12",
    "estimand": "coefficient on the Black alone share in a population-weighted regression of the tract NO₂ national percentile on the ADI national rank, the Hispanic or Latino share, the Black alone share, with each county's population-weighted mean removed from every variable and each variable scaled to a standard deviation of one, errors clustered on county",
    "n": 79725,
    "nUnit": "tracts",
    "note": "A descriptive association within counties, not a causal estimate.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have every variable in the model",
    "source": "ejscreen",
    "unit": "within-county standard deviations of the NO₂ percentile per within-county standard deviation of the predictor",
    "value": 0.119852,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_joint_hisp": {
    "ci": [
      0.15,
      0.21
    ],
    "ciLevel": 0.95,
    "display": "+0.18",
    "estimand": "coefficient on the Hispanic or Latino share in a population-weighted regression of the tract NO₂ national percentile on the ADI national rank, the Hispanic or Latino share, the Black alone share, with each county's population-weighted mean removed from every variable and each variable scaled to a standard deviation of one, errors clustered on county",
    "n": 79725,
    "nUnit": "tracts",
    "note": "A descriptive association within counties, not a causal estimate.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have every variable in the model",
    "source": "ejscreen",
    "unit": "within-county standard deviations of the NO₂ percentile per within-county standard deviation of the predictor",
    "value": 0.179765,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_pov": {
    "ci": [
      0.15,
      0.21
    ],
    "ciLevel": 0.95,
    "display": "+0.18",
    "estimand": "population-weighted correlation of the tract NO₂ national percentile with the tract poverty rate, county-cluster bootstrap interval",
    "n": 82816,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a NO₂ percentile and the tract poverty rate",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.177829,
    "weights": "ACS 2019-2023 tract population"
  },
  "no2_res_all": {
    "ci": [
      47,
      53
    ],
    "ciLevel": 0.95,
    "display": "50",
    "estimand": "mean over tracts of the NO₂ national percentile, each tract weighted by the number of residents in the group (tract grain, not an individual's exposure), county-cluster bootstrap interval",
    "n": 83003,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "all residents of the tracts in the analysis",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 50.1694,
    "weights": "ACS 2019-2023 tract count of residents in the group"
  },
  "no2_res_black": {
    "ci": [
      52,
      60
    ],
    "ciLevel": 0.95,
    "display": "56",
    "estimand": "mean over tracts of the NO₂ national percentile, each tract weighted by the number of residents in the group (tract grain, not an individual's exposure), county-cluster bootstrap interval",
    "n": 74190,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "Black or African American residents who report that race alone (of any ethnicity) of the tracts in the analysis",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 56.4197,
    "weights": "ACS 2019-2023 tract count of residents in the group"
  },
  "no2_res_hisp": {
    "ci": [
      59,
      67
    ],
    "ciLevel": 0.95,
    "display": "63",
    "estimand": "mean over tracts of the NO₂ national percentile, each tract weighted by the number of residents in the group (tract grain, not an individual's exposure), county-cluster bootstrap interval",
    "n": 80460,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "Hispanic or Latino residents (of any race) of the tracts in the analysis",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 63.1498,
    "weights": "ACS 2019-2023 tract count of residents in the group"
  },
  "pc1_asthma": {
    "ci": [
      -0.18,
      0
    ],
    "ciLevel": 0.95,
    "display": "−0.10",
    "estimand": "population-weighted correlation of the tract's modeled prevalence of current asthma among adults with the urban-industrial component (PC1), county-cluster bootstrap interval",
    "n": 80674,
    "nUnit": "tracts",
    "note": "PLACES prevalence is a model-based estimate from survey responses, so it is not a measured rate.",
    "period": "PLACES 2024 release (BRFSS 2022); EJScreen 2024; ACS 2019-2023",
    "population": "residents of tracts in the PCA with a PLACES estimate for current asthma",
    "source": "places",
    "unit": "correlation coefficient",
    "value": -0.0972209,
    "weights": "ACS 2019-2023 tract population"
  },
  "pc1_copd": {
    "ci": [
      -0.42,
      -0.32
    ],
    "ciLevel": 0.95,
    "display": "−0.37",
    "estimand": "population-weighted correlation of the tract's modeled prevalence of COPD among adults with the urban-industrial component (PC1), county-cluster bootstrap interval",
    "n": 80674,
    "nUnit": "tracts",
    "note": "PLACES prevalence is a model-based estimate from survey responses, so it is not a measured rate.",
    "period": "PLACES 2024 release (BRFSS 2022); EJScreen 2024; ACS 2019-2023",
    "population": "residents of tracts in the PCA with a PLACES estimate for COPD",
    "source": "places",
    "unit": "correlation coefficient",
    "value": -0.366337,
    "weights": "ACS 2019-2023 tract population"
  },
  "pc1_diesel": {
    "ci": [
      0.38,
      0.41
    ],
    "ciLevel": 0.95,
    "display": "+0.40",
    "estimand": "eigenvector entry of component 1 (signs fixed so that the traffic weight on component 1 and the storage-tank weight on component 2 are positive), county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "weight on the standardized Diesel PM percentile in component 1 (unit-length eigenvector)",
    "value": 0.398821,
    "weights": "none (each tract counts once)"
  },
  "pc1_hazwaste": {
    "ci": [
      0.37,
      0.4
    ],
    "ciLevel": 0.95,
    "display": "+0.39",
    "estimand": "eigenvector entry of component 1 (signs fixed so that the traffic weight on component 1 and the storage-tank weight on component 2 are positive), county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "weight on the standardized Hazardous-waste facilities percentile in component 1 (unit-length eigenvector)",
    "value": 0.387468,
    "weights": "none (each tract counts once)"
  },
  "pc1_no2": {
    "ci": [
      0.36,
      0.39
    ],
    "ciLevel": 0.95,
    "display": "+0.38",
    "estimand": "eigenvector entry of component 1 (signs fixed so that the traffic weight on component 1 and the storage-tank weight on component 2 are positive), county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "weight on the standardized Nitrogen dioxide percentile in component 1 (unit-length eigenvector)",
    "value": 0.375151,
    "weights": "none (each tract counts once)"
  },
  "pc1_traffic": {
    "ci": [
      0.39,
      0.41
    ],
    "ciLevel": 0.95,
    "display": "+0.40",
    "estimand": "eigenvector entry of component 1 (signs fixed so that the traffic weight on component 1 and the storage-tank weight on component 2 are positive), county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "weight on the standardized Traffic proximity percentile in component 1 (unit-length eigenvector)",
    "value": 0.401106,
    "weights": "none (each tract counts once)"
  },
  "pc1_var": {
    "ci": [
      36.2,
      41.7
    ],
    "ciLevel": 0.95,
    "display": "38.6%",
    "estimand": "eigenvalue share of component 1 of the correlation matrix of the 13 percentiles, each tract counted once, county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "percent of the variance of the 13 standardized percentiles",
    "value": 38.6128,
    "weights": "none (each tract counts once)"
  },
  "pc1_var_w": {
    "display": "37.1%",
    "estimand": "eigenvalue share of component 1 when the standardization and the correlation matrix use population weights",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles, each weighted by its residents",
    "source": "ejscreen",
    "unit": "percent of the variance of the 13 standardized percentiles",
    "value": 37.1491,
    "weights": "ACS 2019-2023 tract population"
  },
  "pc2_lead": {
    "ci": [
      0.33,
      0.56
    ],
    "ciLevel": 0.95,
    "display": "+0.45",
    "estimand": "eigenvector entry of component 2 (signs fixed so that the traffic weight on component 1 and the storage-tank weight on component 2 are positive), county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "weight on the standardized Lead paint (housing built before 1960) percentile in component 2 (unit-length eigenvector)",
    "value": 0.450731,
    "weights": "none (each tract counts once)"
  },
  "pc2_ozone": {
    "ci": [
      -0.38,
      -0.16
    ],
    "ciLevel": 0.95,
    "display": "−0.31",
    "estimand": "eigenvector entry of component 2 (signs fixed so that the traffic weight on component 1 and the storage-tank weight on component 2 are positive), county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "weight on the standardized Ozone percentile in component 2 (unit-length eigenvector)",
    "value": -0.306098,
    "weights": "none (each tract counts once)"
  },
  "pc2_pm25": {
    "ci": [
      -0.55,
      -0.38
    ],
    "ciLevel": 0.95,
    "display": "−0.47",
    "estimand": "eigenvector entry of component 2 (signs fixed so that the traffic weight on component 1 and the storage-tank weight on component 2 are positive), county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "weight on the standardized PM2.5 percentile in component 2 (unit-length eigenvector)",
    "value": -0.474977,
    "weights": "none (each tract counts once)"
  },
  "pc2_tanks": {
    "ci": [
      0.33,
      0.66
    ],
    "ciLevel": 0.95,
    "display": "+0.55",
    "estimand": "eigenvector entry of component 2 (signs fixed so that the traffic weight on component 1 and the storage-tank weight on component 2 are positive), county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "weight on the standardized Underground storage tanks percentile in component 2 (unit-length eigenvector)",
    "value": 0.552773,
    "weights": "none (each tract counts once)"
  },
  "pc2_var": {
    "ci": [
      10.5,
      13.1
    ],
    "ciLevel": 0.95,
    "display": "11.7%",
    "estimand": "eigenvalue share of component 2 of the correlation matrix of the 13 percentiles, each tract counted once, county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "percent of the variance of the 13 standardized percentiles",
    "value": 11.6634,
    "weights": "none (each tract counts once)"
  },
  "pc2_water": {
    "ci": [
      0.19,
      0.43
    ],
    "ciLevel": 0.95,
    "display": "+0.32",
    "estimand": "eigenvector entry of component 2 (signs fixed so that the traffic weight on component 1 and the storage-tank weight on component 2 are positive), county-cluster bootstrap interval",
    "n": 80754,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts with all 13 EJScreen percentiles",
    "source": "ejscreen",
    "unit": "weight on the standardized Drinking-water violations percentile in component 2 (unit-length eigenvector)",
    "value": 0.323712,
    "weights": "none (each tract counts once)"
  },
  "pm25_adi": {
    "ci": [
      -0.29,
      -0.06
    ],
    "ciLevel": 0.95,
    "display": "−0.18",
    "estimand": "population-weighted correlation of the tract PM₂.₅ national percentile with the ADI national rank, county-cluster bootstrap interval",
    "n": 82198,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a PM₂.₅ percentile and an ADI rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.175865,
    "weights": "ACS 2019-2023 tract population"
  },
  "pm25_adi_d1": {
    "ci": [
      52,
      73
    ],
    "ciLevel": 0.95,
    "display": "64",
    "estimand": "population-weighted mean of the tract PM₂.₅ national percentile in an ADI decile (deciles hold equal numbers of tracts), county-cluster bootstrap interval",
    "n": 8149,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in the least deprived of the ten ADI deciles (decile 1)",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 64.2672,
    "weights": "ACS 2019-2023 tract population"
  },
  "pm25_adi_d10": {
    "ci": [
      44,
      51
    ],
    "ciLevel": 0.95,
    "display": "48",
    "estimand": "population-weighted mean of the tract PM₂.₅ national percentile in an ADI decile (deciles hold equal numbers of tracts), county-cluster bootstrap interval",
    "n": 8203,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in the most deprived of the ten ADI deciles (decile 10)",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 47.7572,
    "weights": "ACS 2019-2023 tract population"
  },
  "pm25_adi_d9": {
    "ci": [
      41,
      47
    ],
    "ciLevel": 0.95,
    "display": "44",
    "estimand": "population-weighted mean of the tract PM₂.₅ national percentile in an ADI decile (deciles hold equal numbers of tracts), county-cluster bootstrap interval",
    "n": 8247,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in the ninth of the ten ADI deciles (decile 9)",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 44.0616,
    "weights": "ACS 2019-2023 tract population"
  },
  "pm25_adi_metro": {
    "ci": [
      -0.22,
      0.03
    ],
    "ciLevel": 0.95,
    "display": "−0.10",
    "estimand": "population-weighted correlation of the tract PM₂.₅ national percentile with the ADI national rank, metropolitan tracts only, county-cluster bootstrap interval",
    "n": 66593,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of metropolitan tracts with a PM₂.₅ percentile and the ADI national rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.102228,
    "weights": "ACS 2019-2023 tract population"
  },
  "pm25_adi_state": {
    "ci": [
      -0.38,
      0.1
    ],
    "ciLevel": 0.95,
    "display": "−0.18",
    "estimand": "population-weighted correlation of the tract PM₂.₅ national percentile with the ADI national rank, bootstrap interval from redrawing whole states",
    "n": 82198,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a PM₂.₅ percentile and the ADI national rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.175865,
    "weights": "ACS 2019-2023 tract population"
  },
  "pm25_black": {
    "ci": [
      0,
      0.12
    ],
    "ciLevel": 0.95,
    "display": "+0.06",
    "estimand": "population-weighted correlation of the tract PM₂.₅ national percentile with the tract's Black alone share, county-cluster bootstrap interval",
    "n": 83008,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a PM₂.₅ percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.0604463,
    "weights": "ACS 2019-2023 tract population"
  },
  "pm25_hisp": {
    "ci": [
      0.22,
      0.4
    ],
    "ciLevel": 0.95,
    "display": "+0.32",
    "estimand": "population-weighted correlation of the tract PM₂.₅ national percentile with the tract's Hispanic or Latino share, county-cluster bootstrap interval",
    "n": 83008,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a PM₂.₅ percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.315223,
    "weights": "ACS 2019-2023 tract population"
  },
  "pm25_q25": {
    "display": "7.3",
    "estimand": "25th percentile of the tract concentrations (each tract counts once)",
    "n": 83008,
    "nUnit": "tracts",
    "note": "",
    "period": "air quality modeled for 2020",
    "population": "tracts with a modeled PM₂.₅ value",
    "source": "ejscreen",
    "unit": "micrograms of PM₂.₅ per cubic meter, annual average",
    "value": 7.30294,
    "weights": "none (each tract counts once)"
  },
  "pm25_q75": {
    "display": "9.0",
    "estimand": "75th percentile of the tract concentrations (each tract counts once)",
    "n": 83008,
    "nUnit": "tracts",
    "note": "",
    "period": "air quality modeled for 2020",
    "population": "tracts with a modeled PM₂.₅ value",
    "source": "ejscreen",
    "unit": "micrograms of PM₂.₅ per cubic meter, annual average",
    "value": 9.02055,
    "weights": "none (each tract counts once)"
  },
  "pm25_ug_d1": {
    "ci": [
      8.7,
      10.4
    ],
    "ciLevel": 0.95,
    "display": "9.6",
    "estimand": "population-weighted mean of the tract's modeled PM₂.₅ concentration, county-cluster bootstrap interval",
    "n": 8149,
    "nUnit": "tracts",
    "note": "",
    "period": "air quality modeled for 2020; ADI 2023",
    "population": "residents of tracts in the least deprived ADI decile",
    "source": "ejscreen",
    "unit": "micrograms of PM₂.₅ per cubic meter, annual average",
    "value": 9.61957,
    "weights": "ACS 2019-2023 tract population"
  },
  "pm25_ug_d10": {
    "ci": [
      7.9,
      8.2
    ],
    "ciLevel": 0.95,
    "display": "8.1",
    "estimand": "population-weighted mean of the tract's modeled PM₂.₅ concentration, county-cluster bootstrap interval",
    "n": 8203,
    "nUnit": "tracts",
    "note": "",
    "period": "air quality modeled for 2020; ADI 2023",
    "population": "residents of tracts in the most deprived ADI decile",
    "source": "ejscreen",
    "unit": "micrograms of PM₂.₅ per cubic meter, annual average",
    "value": 8.07878,
    "weights": "ACS 2019-2023 tract population"
  },
  "pop_frame": {
    "display": "330.1 million",
    "estimand": "sum of tract population",
    "note": "",
    "period": "ACS 2019-2023",
    "population": "residents of the tracts in the analysis",
    "source": "acs",
    "unit": "people",
    "value": 330124734,
    "weights": "none (full count)"
  },
  "ptraf_adi": {
    "ci": [
      -0.49,
      -0.33
    ],
    "ciLevel": 0.95,
    "display": "−0.41",
    "estimand": "population-weighted correlation of the tract Traffic proximity national percentile with the ADI national rank, county-cluster bootstrap interval",
    "n": 82198,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a Traffic proximity percentile and an ADI rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.412768,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_adi_between": {
    "ci": [
      -0.73,
      -0.58
    ],
    "ciLevel": 0.95,
    "display": "−0.66",
    "estimand": "correlation across counties of the county's population-weighted mean traffic percentile with its population-weighted mean ADI rank, each county weighted by its residents, bootstrap interval over counties",
    "n": 3095,
    "nUnit": "counties",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of counties, one point per county with at least one tract that has a traffic-proximity percentile and an ADI rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.656316,
    "weights": "ACS 2019-2023 county population (sum of tract population)"
  },
  "ptraf_adi_d1": {
    "ci": [
      68,
      79
    ],
    "ciLevel": 0.95,
    "display": "75",
    "estimand": "population-weighted mean of the tract Traffic proximity national percentile in an ADI decile (deciles hold equal numbers of tracts), county-cluster bootstrap interval",
    "n": 8149,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in the least deprived of the ten ADI deciles (decile 1)",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 74.7034,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_adi_d10": {
    "ci": [
      35,
      42
    ],
    "ciLevel": 0.95,
    "display": "39",
    "estimand": "population-weighted mean of the tract Traffic proximity national percentile in an ADI decile (deciles hold equal numbers of tracts), county-cluster bootstrap interval",
    "n": 8203,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in the most deprived of the ten ADI deciles (decile 10)",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 38.9853,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_adi_d9": {
    "ci": [
      32,
      38
    ],
    "ciLevel": 0.95,
    "display": "35",
    "estimand": "population-weighted mean of the tract Traffic proximity national percentile in an ADI decile (deciles hold equal numbers of tracts), county-cluster bootstrap interval",
    "n": 8247,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in the ninth of the ten ADI deciles (decile 9)",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 34.9198,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_adi_metro": {
    "ci": [
      -0.4,
      -0.21
    ],
    "ciLevel": 0.95,
    "display": "−0.31",
    "estimand": "population-weighted correlation of the tract Traffic proximity national percentile with the ADI national rank, metropolitan tracts only, county-cluster bootstrap interval",
    "n": 66593,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of metropolitan tracts with a Traffic proximity percentile and the ADI national rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.306481,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_adi_state": {
    "ci": [
      -0.52,
      -0.25
    ],
    "ciLevel": 0.95,
    "display": "−0.41",
    "estimand": "population-weighted correlation of the tract Traffic proximity national percentile with the ADI national rank, bootstrap interval from redrawing whole states",
    "n": 82198,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a Traffic proximity percentile and the ADI national rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": -0.412768,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_adi_within": {
    "ci": [
      0.15,
      0.22
    ],
    "ciLevel": 0.95,
    "display": "+0.19",
    "estimand": "population-weighted correlation of the tract Traffic proximity national percentile with the ADI national rank, after removing each county's population-weighted mean from both (counties with at least 5 tracts), county-cluster bootstrap interval",
    "n": 79730,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have a Traffic proximity percentile and the ADI national rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.187869,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_black": {
    "ci": [
      0.12,
      0.22
    ],
    "ciLevel": 0.95,
    "display": "+0.17",
    "estimand": "population-weighted correlation of the tract Traffic proximity national percentile with the tract's Black alone share, county-cluster bootstrap interval",
    "n": 82998,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a Traffic proximity percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.166603,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_black_within": {
    "ci": [
      0.14,
      0.19
    ],
    "ciLevel": 0.95,
    "display": "+0.16",
    "estimand": "population-weighted correlation of the tract Traffic proximity national percentile with the tract's Black alone share after removing each county's population-weighted mean from both, county-cluster bootstrap interval",
    "n": 80544,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have a Traffic proximity percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.163473,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_hisp": {
    "ci": [
      0.27,
      0.4
    ],
    "ciLevel": 0.95,
    "display": "+0.33",
    "estimand": "population-weighted correlation of the tract Traffic proximity national percentile with the tract's Hispanic or Latino share, county-cluster bootstrap interval",
    "n": 82998,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a Traffic proximity percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.333163,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_hisp_within": {
    "ci": [
      0.16,
      0.21
    ],
    "ciLevel": 0.95,
    "display": "+0.19",
    "estimand": "population-weighted correlation of the tract Traffic proximity national percentile with the tract's Hispanic or Latino share after removing each county's population-weighted mean from both, county-cluster bootstrap interval",
    "n": 80544,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have a Traffic proximity percentile and a race and ethnicity share",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.18514,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_joint_adi": {
    "ci": [
      0.02,
      0.1
    ],
    "ciLevel": 0.95,
    "display": "+0.06",
    "estimand": "coefficient on the ADI national rank in a population-weighted regression of the tract Traffic proximity national percentile on the ADI national rank, the Hispanic or Latino share, the Black alone share, with each county's population-weighted mean removed from every variable and each variable scaled to a standard deviation of one, errors clustered on county",
    "n": 79730,
    "nUnit": "tracts",
    "note": "A descriptive association within counties, not a causal estimate.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have every variable in the model",
    "source": "ejscreen",
    "unit": "within-county standard deviations of the Traffic proximity percentile per within-county standard deviation of the predictor",
    "value": 0.0597558,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_joint_black": {
    "ci": [
      0.12,
      0.19
    ],
    "ciLevel": 0.95,
    "display": "+0.15",
    "estimand": "coefficient on the Black alone share in a population-weighted regression of the tract Traffic proximity national percentile on the ADI national rank, the Hispanic or Latino share, the Black alone share, with each county's population-weighted mean removed from every variable and each variable scaled to a standard deviation of one, errors clustered on county",
    "n": 79730,
    "nUnit": "tracts",
    "note": "A descriptive association within counties, not a causal estimate.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have every variable in the model",
    "source": "ejscreen",
    "unit": "within-county standard deviations of the Traffic proximity percentile per within-county standard deviation of the predictor",
    "value": 0.150679,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_joint_hisp": {
    "ci": [
      0.14,
      0.21
    ],
    "ciLevel": 0.95,
    "display": "+0.17",
    "estimand": "coefficient on the Hispanic or Latino share in a population-weighted regression of the tract Traffic proximity national percentile on the ADI national rank, the Hispanic or Latino share, the Black alone share, with each county's population-weighted mean removed from every variable and each variable scaled to a standard deviation of one, errors clustered on county",
    "n": 79730,
    "nUnit": "tracts",
    "note": "A descriptive association within counties, not a causal estimate.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have every variable in the model",
    "source": "ejscreen",
    "unit": "within-county standard deviations of the Traffic proximity percentile per within-county standard deviation of the predictor",
    "value": 0.17211,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_jointb_black": {
    "ci": [
      0.07,
      0.14
    ],
    "ciLevel": 0.95,
    "display": "+0.10",
    "estimand": "coefficient on the Black alone share in a population-weighted regression of the tract Traffic proximity national percentile on the tract poverty rate, the Hispanic or Latino share, the Black alone share, with each county's population-weighted mean removed from every variable and each variable scaled to a standard deviation of one, errors clustered on county",
    "n": 80353,
    "nUnit": "tracts",
    "note": "A descriptive association within counties, not a causal estimate.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have every variable in the model",
    "source": "ejscreen",
    "unit": "within-county standard deviations of the Traffic proximity percentile per within-county standard deviation of the predictor",
    "value": 0.103822,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_jointb_hisp": {
    "ci": [
      0.1,
      0.17
    ],
    "ciLevel": 0.95,
    "display": "+0.14",
    "estimand": "coefficient on the Hispanic or Latino share in a population-weighted regression of the tract Traffic proximity national percentile on the tract poverty rate, the Hispanic or Latino share, the Black alone share, with each county's population-weighted mean removed from every variable and each variable scaled to a standard deviation of one, errors clustered on county",
    "n": 80353,
    "nUnit": "tracts",
    "note": "A descriptive association within counties, not a causal estimate.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have every variable in the model",
    "source": "ejscreen",
    "unit": "within-county standard deviations of the Traffic proximity percentile per within-county standard deviation of the predictor",
    "value": 0.136297,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_jointb_pov": {
    "ci": [
      0.17,
      0.21
    ],
    "ciLevel": 0.95,
    "display": "+0.19",
    "estimand": "coefficient on the tract poverty rate in a population-weighted regression of the tract Traffic proximity national percentile on the tract poverty rate, the Hispanic or Latino share, the Black alone share, with each county's population-weighted mean removed from every variable and each variable scaled to a standard deviation of one, errors clustered on county",
    "n": 80353,
    "nUnit": "tracts",
    "note": "A descriptive association within counties, not a causal estimate.",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have every variable in the model",
    "source": "ejscreen",
    "unit": "within-county standard deviations of the Traffic proximity percentile per within-county standard deviation of the predictor",
    "value": 0.190271,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_metro_d1": {
    "ci": [
      69,
      80
    ],
    "ciLevel": 0.95,
    "display": "76",
    "estimand": "population-weighted mean of the tract Traffic proximity national percentile, metropolitan tracts only, ADI deciles of all tracts, county-cluster bootstrap interval",
    "n": 7879,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of metropolitan tracts (RUCA codes 1 to 3) in ADI decile 1 of all tracts",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 75.6454,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_metro_d9": {
    "ci": [
      45,
      50
    ],
    "ciLevel": 0.95,
    "display": "48",
    "estimand": "population-weighted mean of the tract Traffic proximity national percentile, metropolitan tracts only, ADI deciles of all tracts, county-cluster bootstrap interval",
    "n": 4817,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of metropolitan tracts (RUCA codes 1 to 3) in ADI decile 9 of all tracts",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 47.5479,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_pov": {
    "ci": [
      0.04,
      0.11
    ],
    "ciLevel": 0.95,
    "display": "+0.07",
    "estimand": "population-weighted correlation of the tract Traffic proximity national percentile with the tract poverty rate, county-cluster bootstrap interval",
    "n": 82818,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a Traffic proximity percentile and the tract poverty rate",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.074656,
    "weights": "ACS 2019-2023 tract population"
  },
  "ptraf_pov_within": {
    "ci": [
      0.24,
      0.29
    ],
    "ciLevel": 0.95,
    "display": "+0.27",
    "estimand": "population-weighted correlation of the tract Traffic proximity national percentile with the tract poverty rate, after removing each county's population-weighted mean from both (counties with at least 5 tracts), county-cluster bootstrap interval",
    "n": 80353,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in counties with at least 5 tracts that have a Traffic proximity percentile and the tract poverty rate",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.266851,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_counties": {
    "display": "215",
    "estimand": "count of counties",
    "note": "",
    "period": "HOLC maps of 1935 to 1940",
    "population": "counties with at least one graded tract in the analysis",
    "source": "holc",
    "unit": "counties",
    "value": 215,
    "weights": "none (full count)"
  },
  "redline_dslpm_a": {
    "ci": [
      69,
      77
    ],
    "ciLevel": 0.95,
    "display": "73",
    "estimand": "mean of the tract diesel PM national percentile, population-weighted, county-cluster bootstrap interval",
    "n": 672,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts whose dominant 1930s HOLC grade is A",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 73.0483,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_dslpm_d": {
    "ci": [
      81,
      89
    ],
    "ciLevel": 0.95,
    "display": "86",
    "estimand": "mean of the tract diesel PM national percentile, population-weighted, county-cluster bootstrap interval",
    "n": 2978,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts whose dominant 1930s HOLC grade is D",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 86.019,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_fe_counties": {
    "display": "199",
    "estimand": "count of counties that inform a within-county contrast between grades",
    "note": "",
    "period": "HOLC maps of 1935 to 1940",
    "population": "counties with graded tracts of at least two different grades",
    "source": "holc",
    "unit": "counties",
    "value": 199,
    "weights": "none (full count)"
  },
  "redline_fe_dslpm": {
    "ci": [
      3.9,
      6.5
    ],
    "ciLevel": 0.95,
    "display": "5.1",
    "estimand": "coefficient on grade D, against grade A, in a population-weighted regression of the tract diesel PM national percentile on grade dummies with county fixed effects, bootstrap interval over counties",
    "n": 10950,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of graded tracts in counties that hold more than one grade",
    "source": "ejscreen",
    "unit": "national percentile points, grade D minus grade A",
    "value": 5.14309,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_fe_no2": {
    "ci": [
      7.2,
      12.2
    ],
    "ciLevel": 0.95,
    "display": "9.7",
    "estimand": "coefficient on grade D, against grade A, in a population-weighted regression of the tract NO₂ national percentile on grade dummies with county fixed effects, bootstrap interval over counties",
    "n": 10950,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of graded tracts in counties that hold more than one grade",
    "source": "ejscreen",
    "unit": "national percentile points, grade D minus grade A",
    "value": 9.74378,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_fe_pm25": {
    "ci": [
      0.2,
      2
    ],
    "ciLevel": 0.95,
    "display": "1.1",
    "estimand": "coefficient on grade D, against grade A, in a population-weighted regression of the tract PM₂.₅ national percentile on grade dummies with county fixed effects, bootstrap interval over counties",
    "n": 10950,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of graded tracts in counties that hold more than one grade",
    "source": "ejscreen",
    "unit": "national percentile points, grade D minus grade A",
    "value": 1.13088,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_fe_ptraf": {
    "ci": [
      2.7,
      5.1
    ],
    "ciLevel": 0.95,
    "display": "3.9",
    "estimand": "coefficient on grade D, against grade A, in a population-weighted regression of the tract traffic national percentile on grade dummies with county fixed effects, bootstrap interval over counties",
    "n": 10950,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of graded tracts in counties that hold more than one grade",
    "source": "ejscreen",
    "unit": "national percentile points, grade D minus grade A",
    "value": 3.91236,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_fe_stack": {
    "ci": [
      0.4,
      0.7
    ],
    "ciLevel": 0.95,
    "display": "0.6",
    "estimand": "coefficient on grade D, against grade A, in a population-weighted regression of the tract stacked-hazard score on grade dummies with county fixed effects, bootstrap interval over counties",
    "n": 10950,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of graded tracts in counties that hold more than one grade",
    "source": "ejscreen",
    "unit": "air hazards in the top quarter of tracts (0 to 5), grade D minus grade A",
    "value": 0.576205,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_n": {
    "display": "10,950",
    "estimand": "count of tracts with a dominant grade",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; EJScreen 2024",
    "population": "2020 tracts in the analysis at least half covered by HOLC polygons graded A to D",
    "source": "holc",
    "unit": "tracts",
    "value": 10950,
    "weights": "none (full count)"
  },
  "redline_no2_a": {
    "ci": [
      70,
      76
    ],
    "ciLevel": 0.95,
    "display": "73",
    "estimand": "mean of the tract NO₂ national percentile, population-weighted, county-cluster bootstrap interval",
    "n": 672,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts whose dominant 1930s HOLC grade is A",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 73.0281,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_no2_d": {
    "ci": [
      83,
      89
    ],
    "ciLevel": 0.95,
    "display": "86",
    "estimand": "mean of the tract NO₂ national percentile, population-weighted, county-cluster bootstrap interval",
    "n": 2978,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts whose dominant 1930s HOLC grade is D",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 86.3648,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_pm25_a": {
    "ci": [
      49,
      63
    ],
    "ciLevel": 0.95,
    "display": "56",
    "estimand": "mean of the tract PM₂.₅ national percentile, population-weighted, county-cluster bootstrap interval",
    "n": 672,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts whose dominant 1930s HOLC grade is A",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 55.8496,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_pm25_d": {
    "ci": [
      51,
      69
    ],
    "ciLevel": 0.95,
    "display": "60",
    "estimand": "mean of the tract PM₂.₅ national percentile, population-weighted, county-cluster bootstrap interval",
    "n": 2978,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts whose dominant 1930s HOLC grade is D",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 60.0211,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_pop": {
    "display": "37.9 million",
    "estimand": "sum of tract population",
    "note": "",
    "period": "ACS 2019-2023",
    "population": "residents of the graded tracts",
    "source": "acs",
    "unit": "people",
    "value": 37883826,
    "weights": "none (full count)"
  },
  "redline_ptraf_a": {
    "ci": [
      75,
      80
    ],
    "ciLevel": 0.95,
    "display": "78",
    "estimand": "mean of the tract traffic national percentile, population-weighted, county-cluster bootstrap interval",
    "n": 672,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts whose dominant 1930s HOLC grade is A",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 77.5526,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_ptraf_d": {
    "ci": [
      83,
      89
    ],
    "ciLevel": 0.95,
    "display": "86",
    "estimand": "mean of the tract traffic national percentile, population-weighted, county-cluster bootstrap interval",
    "n": 2978,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts whose dominant 1930s HOLC grade is D",
    "source": "ejscreen",
    "unit": "national percentile of the tract (0 to 100)",
    "value": 86.338,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_stack_a": {
    "ci": [
      2,
      2.5
    ],
    "ciLevel": 0.95,
    "display": "2.3",
    "estimand": "mean of the stacked-exposure score, population-weighted, county-cluster bootstrap interval",
    "n": 672,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts whose dominant 1930s HOLC grade is A",
    "source": "ejscreen",
    "unit": "air hazards in the top quarter of tracts (0 to 5)",
    "value": 2.28744,
    "weights": "ACS 2019-2023 tract population"
  },
  "redline_stack_d": {
    "ci": [
      2.8,
      3.5
    ],
    "ciLevel": 0.95,
    "display": "3.2",
    "estimand": "mean of the stacked-exposure score, population-weighted, county-cluster bootstrap interval",
    "n": 2978,
    "nUnit": "tracts",
    "note": "",
    "period": "HOLC maps of 1935 to 1940; air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts whose dominant 1930s HOLC grade is D",
    "source": "ejscreen",
    "unit": "air hazards in the top quarter of tracts (0 to 5)",
    "value": 3.19309,
    "weights": "ACS 2019-2023 tract population"
  },
  "rural_all": {
    "display": "6.9%",
    "estimand": "population-weighted share of residents in tracts coded 7 to 10 in the USDA Rural-Urban Commuting Area scheme",
    "n": 82124,
    "nUnit": "tracts",
    "note": "",
    "period": "RUCA 2010 codes on 2020 tracts; ACS 2019-2023",
    "population": "residents of all tracts with a RUCA code",
    "source": "adi",
    "unit": "percent of residents living in small-town and rural tracts",
    "value": 6.87691,
    "weights": "ACS 2019-2023 tract population"
  },
  "rural_hi": {
    "ci": [
      16.2,
      21
    ],
    "ciLevel": 0.95,
    "display": "18.5%",
    "estimand": "population-weighted share of residents in tracts coded 7 to 10 in the USDA Rural-Urban Commuting Area scheme, county-cluster bootstrap interval",
    "n": 8194,
    "nUnit": "tracts",
    "note": "",
    "period": "RUCA 2010 codes on 2020 tracts; ADI 2023; ACS 2019-2023",
    "population": "residents of tracts in ADI decile 10 with a RUCA code (Connecticut has none)",
    "source": "adi",
    "unit": "percent of residents living in small-town and rural tracts",
    "value": 18.4667,
    "weights": "ACS 2019-2023 tract population"
  },
  "rural_lo": {
    "ci": [
      0.4,
      1.1
    ],
    "ciLevel": 0.95,
    "display": "0.6%",
    "estimand": "population-weighted share of residents in tracts coded 7 to 10 in the USDA Rural-Urban Commuting Area scheme, county-cluster bootstrap interval",
    "n": 8077,
    "nUnit": "tracts",
    "note": "",
    "period": "RUCA 2010 codes on 2020 tracts; ADI 2023; ACS 2019-2023",
    "population": "residents of tracts in ADI decile 1 with a RUCA code (Connecticut has none)",
    "source": "adi",
    "unit": "percent of residents living in small-town and rural tracts",
    "value": 0.641764,
    "weights": "ACS 2019-2023 tract population"
  },
  "rural_peak": {
    "ci": [
      18.4,
      22.3
    ],
    "ciLevel": 0.95,
    "display": "20.3%",
    "estimand": "population-weighted share of residents in tracts coded 7 to 10 in the USDA Rural-Urban Commuting Area scheme, county-cluster bootstrap interval",
    "n": 8214,
    "nUnit": "tracts",
    "note": "",
    "period": "RUCA 2010 codes on 2020 tracts; ADI 2023; ACS 2019-2023",
    "population": "residents of tracts in ADI decile 9 with a RUCA code (Connecticut has none)",
    "source": "adi",
    "unit": "percent of residents living in small-town and rural tracts",
    "value": 20.2661,
    "weights": "ACS 2019-2023 tract population"
  },
  "stack_adi_hi": {
    "ci": [
      0.8,
      1.2
    ],
    "ciLevel": 0.95,
    "display": "1.0",
    "estimand": "population-weighted mean of the stacked-exposure score within a decile of tracts, county-cluster bootstrap interval",
    "n": 8203,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 10 of the ADI rank",
    "source": "ejscreen",
    "unit": "air hazards in the top quarter of tracts (0 to 5)",
    "value": 0.982454,
    "weights": "ACS 2019-2023 tract population"
  },
  "stack_adi_lo": {
    "ci": [
      1.7,
      2.5
    ],
    "ciLevel": 0.95,
    "display": "2.1",
    "estimand": "population-weighted mean of the stacked-exposure score within a decile of tracts, county-cluster bootstrap interval",
    "n": 8146,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 1 of the ADI rank",
    "source": "ejscreen",
    "unit": "air hazards in the top quarter of tracts (0 to 5)",
    "value": 2.13236,
    "weights": "ACS 2019-2023 tract population"
  },
  "stack_black_hi": {
    "ci": [
      1.4,
      2
    ],
    "ciLevel": 0.95,
    "display": "1.7",
    "estimand": "population-weighted mean of the stacked-exposure score within a decile of tracts, county-cluster bootstrap interval",
    "n": 8298,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 10 of the Black alone share",
    "source": "ejscreen",
    "unit": "air hazards in the top quarter of tracts (0 to 5)",
    "value": 1.70378,
    "weights": "ACS 2019-2023 tract population"
  },
  "stack_black_lo": {
    "ci": [
      0.6,
      1
    ],
    "ciLevel": 0.95,
    "display": "0.8",
    "estimand": "population-weighted mean of the stacked-exposure score within a decile of tracts, county-cluster bootstrap interval",
    "n": 8809,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 1 of the Black alone share",
    "source": "ejscreen",
    "unit": "air hazards in the top quarter of tracts (0 to 5)",
    "value": 0.800025,
    "weights": "ACS 2019-2023 tract population"
  },
  "stack_cut": {
    "display": "75",
    "estimand": "a hazard counts as stacked when the tract's national percentile is at or above this cutoff (the top quarter of tracts); a definition",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "tracts",
    "source": "ejscreen",
    "unit": "national percentile",
    "value": 75,
    "weights": "none (definition)"
  },
  "stack_hisp_hi": {
    "ci": [
      1.8,
      2.8
    ],
    "ciLevel": 0.95,
    "display": "2.3",
    "estimand": "population-weighted mean of the stacked-exposure score within a decile of tracts, county-cluster bootstrap interval",
    "n": 8299,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 10 of the Hispanic or Latino share",
    "source": "ejscreen",
    "unit": "air hazards in the top quarter of tracts (0 to 5)",
    "value": 2.34428,
    "weights": "ACS 2019-2023 tract population"
  },
  "stack_hisp_lo": {
    "ci": [
      0.5,
      0.7
    ],
    "ciLevel": 0.95,
    "display": "0.6",
    "estimand": "population-weighted mean of the stacked-exposure score within a decile of tracts, county-cluster bootstrap interval",
    "n": 8295,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts in decile 1 of the Hispanic or Latino share",
    "source": "ejscreen",
    "unit": "air hazards in the top quarter of tracts (0 to 5)",
    "value": 0.599507,
    "weights": "ACS 2019-2023 tract population"
  },
  "stack_n_haz": {
    "display": "5",
    "estimand": "number of air hazards in the stacked score; a definition",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "PM₂.₅, diesel PM, NO₂, traffic proximity and toxic releases to air",
    "source": "ejscreen",
    "unit": "air hazards",
    "value": 5,
    "weights": "none (definition)"
  },
  "ust_adi": {
    "ci": [
      0.13,
      0.36
    ],
    "ciLevel": 0.95,
    "display": "+0.25",
    "estimand": "population-weighted correlation of the tract Underground storage tanks national percentile with the ADI national rank, county-cluster bootstrap interval",
    "n": 82198,
    "nUnit": "tracts",
    "note": "",
    "period": "air indicators modeled for 2020 (toxic releases for 2021), population and deprivation 2019-2023",
    "population": "residents of tracts with a Underground storage tanks percentile and an ADI rank",
    "source": "ejscreen",
    "unit": "correlation coefficient",
    "value": 0.252575,
    "weights": "ACS 2019-2023 tract population"
  }
}