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ENVIRONMENTAL HEALTH HAZARD INDEXSummary The environmental health hazard exposure index summarizes potential exposure to harmful toxins at a neighborhood level. Potential health hazards exposure is a linear combination of standardized EPA estimates of air quality carcinogenic (c), respiratory (r) and neurological (n) hazards with i indexing census tracts. Where means  and standard errors  are estimated over the national distribution.   Interpretation Values are inverted and then percentile ranked nationally. Values range from 0 to 100. The higher the index value, the less exposure to toxins harmful to human health. Therefore, the higher the value, the better the environmental quality of a neighborhood, where a neighborhood is a census block-group. Data Source: National Air Toxics Assessment (NATA) data, 2011. Related AFFH-T Local Government, PHA and State Tables/Maps: Table 12; Map 13. References:http://www.epa.gov/ttn/atw/natamain/ To learn more about the Environmental Health Hazard Index visit: https://www.hudexchange.info/resource/4868/affh-raw-data/Date of Coverage: 11/2017 Data Updated: Annually

Dataset Attributes

  • OBJECTID
    Number
  • GEOID
    Text
  • STATE
    Text
  • STUSAB
    Text
  • STATE_NAME
    Text
  • COUNTY
    Text
  • COUNTY_NAME
    Text
  • CNTY_FIPS
    Text
  • TRACT
    Text
  • Environmental Health Hazard Index
    Number
  • Shape__Area
    Number
    0.9326171875 to 1775133682304.2
  • Shape__Length
    Number

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