Department of Housing and Urban Development, Office of Policy Development and ResearchThe 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, respiratory and neurological hazards with indexing census tracts.ArcGIS FeatureLayerc7e2c62560bd4a999f0e0b2f4cee2494_19engHUD-eGIS Geospatial Data StorefrontPublicEnvironmental Health Hazard Index [United States]Web servicesUnited StatesLast Modified: 2023-07-21