Natural Resource Ecology & Management: U.S. agencies / departments
Environmental Protection Agency - See Environmental Topics and Laws & Regulations. Search the Internet Archive https://archive.org/index.php 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.