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ENVIRONMENTAL HEALTH HAZARD INDEXSummaryThe 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.InterpretationValues 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 tract.Data Source: National Air Toxics Assessment (NATA) data, 2011. Data Current as of: 2/22/2017References:http://www.epa.gov/ttn/atw/natamain/

Dataset Attributes

  • OBJECTID
    Number
  • GEOID
    Text
    {"value"=>"24510150300", "count"=>1} (), {"value"=>"26065006600", "count"=>1} (), {"value"=>"51107611005", "count"=>1} (), {"value"=>"6099000503", "count"=>1} (), {"value"=>"6073008352", "count"=>1} (), {"value"=>"36005007600", "count"=>1} (), {"value"=>"10005050803", "count"=>1} (), {"value"=>"9005310803", "count"=>1} (), {"value"=>"32003002848", "count"=>1} (), {"value"=>"6037191000", "count"=>1} ()
  • STATE
    Text
    {"value"=>"06", "count"=>8043} (), {"value"=>"48", "count"=>5260} (), {"value"=>"36", "count"=>4906} (), {"value"=>"12", "count"=>4212} (), {"value"=>"42", "count"=>3218} (), {"value"=>"17", "count"=>3121} (), {"value"=>"39", "count"=>2949} (), {"value"=>"26", "count"=>2775} (), {"value"=>"37", "count"=>2192} (), {"value"=>"34", "count"=>2007} ()
  • COUNTY
    Text
    {"value"=>"037", "count"=>2966} (), {"value"=>"031", "count"=>2496} (), {"value"=>"003", "count"=>2397} (), {"value"=>"013", "count"=>2104} (), {"value"=>"001", "count"=>1765} (), {"value"=>"005", "count"=>1671} (), {"value"=>"059", "count"=>1552} (), {"value"=>"081", "count"=>1391} (), {"value"=>"029", "count"=>1316} (), {"value"=>"035", "count"=>1235} ()
  • TRACT
    Text
    {"value"=>"012100", "count"=>53} (), {"value"=>"004200", "count"=>47} (), {"value"=>"000701", "count"=>44} (), {"value"=>"001202", "count"=>42} (), {"value"=>"040700", "count"=>42} (), {"value"=>"004900", "count"=>37} (), {"value"=>"004600", "count"=>36} (), {"value"=>"004700", "count"=>33} (), {"value"=>"013600", "count"=>31} (), {"value"=>"011402", "count"=>24} ()
  • Index Score
    Number
    0 to 99
  • Shape__Area
    Number
    0.931640625 to 1775133682304.45
  • Shape__Length
    Number
    7.95682771492287 to 12774487.7815424

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