A state-by-state listing of superfund sites, "the worst areas of pollution in the United States," listing each site on the National Priorities List (NPL) with "location, history, the type of contamination that affects the soil and groundwater, the number of people who are threatened, the clean-up work that has been conducted or that is planned, the parties responsible for the contamination, the legal actions that have been taken, and sources for more detailed information."
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