ENVIRONMENTAL HEALTH HAZARD INDEX Summary
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, 2014.
Related AFFH-T Local Government, PHA and State Tables/Maps: Table 12; Map 13.
References: https://www.epa.gov/ttn/atw/natamain/
To learn more about the Environmental Health Hazard Index visit: https://www.hud.gov/program_offices/fair_housing_equal_opp/affh; https://www.hud.gov/sites/dfiles/FHEO/documents/AFFH-T-Data-Documentation-AFFHT0006-July-2020.pdf Date of Coverage: 07/2020
Creator:
United States. Department of Housing and Urban Development
HUD and the dataset and metadata authors assume no responsibility for the use or misuse of the dataset. No warranty, expressed or implied is made with regard to the accuracy of the spatial accuracy, and no liability is assumed by the U.S. Government in general, the dataset creators or the U.S. Department of Housing and Urban Development specifically, as to the spatial or attribute accuracy of the data.