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      <title>Environmental Health Hazard Index, 2015</title>
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      <namePart>United States. Department of Housing and Urban Development</namePart>
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    <abstract lang="eng" displayLabel="Abstract">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, 2005. Data Current As Of: 6/15/2015.</abstract>
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    <note lang="eng" displayLabel="Preferred citation">United States. Department of Housing and Urban Development. (2015). Environmental Health Hazard Index, 2015. United States. Department of Housing and Urban Development. Available at http://purl.stanford.edu/qh915ct6967.</note>
    <note displayLabel="Supplemental information">References:http://www.epa.gov/ttn/atw/natamain/</note>
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