A Superfund site is an uncontrolled or abandoned place where hazardous waste is located, possibly affecting local ecosystems or people. Sites are listed on the National Priorities List (NPL) upon completion of Hazard Ranking System (HRS) screening, public solicitation of comments about the proposed site, and after all comments have been addressed.

Over the past 20+ years, Superfund has located and analyzed tens of thousands of hazardous waste sites, protected people and the environment from contamination at the worst sites, and involved states, local communities, and other partners in cleanup. Superfund measures its cleanup accomplishments through various criteria including construction and post construction completions of hazardous waste sites.

http://www.epa.gov/superfund/sites/index.htm

Map of NPL Sites across America -http://www.epa.gov/superfund/sites/npl/npl.htm

The NPL is the list of national priorities among the known releases or threatened releases of hazardous substances, pollutants, or contaminants throughout the United States and its territories. The NPL is intended primarily to guide the EPA in determining which sites warrant further investigation. From this web site, you can locate NPL sites, check their cleanup progress, and get information on new and proposed NPL sites.

http://www.epa.gov/superfund/index.htm

http://www.epa.gov/superfund/sites/npl/