To provide an easily accessible, corrected data set of polygons for hazardous waste sites in the United States which can be used to identify nearby populations and assess their potential risk.

To provide an easily accessible, corrected EPA data set of the geo-referenced locations displayed as points for all the National Priorities List (NPL) Superfund sites in the United States, Puerto Rico, and other territories.

To provide the ATSDR polygon data set of hazardous waste sites in the United States, Puerto Rico, and other territories which can be used to identify nearby populations and assess their potential risk.