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Natural Resource Ecology & Management: U.S. agencies / departments

Environmental Protection Agency - See Environmental Topics and Laws & Regulations. Search the Internet Archive for information on the EPA site prior to January 2017.

Envirofacts - Retrieve information by address, zip, city, county, waterbody, park name, for air, land, water, waste, toxics, radiation, etc.

Environmental Health & Toxicology - Find information about chemicals and drugs, diseases and the environment, environmental health, occupational safety and health, poisoning, risk assessment and regulation, toxicology, pesticide exposure.

Water Resources of the U.S., USGS - Information on the nation’s water resources published by the U.S. Geological Survey. Search for data, maps, publications.

U.S. Geological Survey Publications - 130,000 full-text publications written by USGS scientists. Search by key term, see also the advanced search.

Environmental Impact statements - Detailed written statements for a proposed major federal action significantly affecting the quality of the environment. Search by title.