U.S. Environmental Protection Agency

US Govt Environmental Protection Agency to protect human health and the environment. Includes exhaustive informational, educational, legal resources.

http://www.epa.gov/

National Institute of Environmental Health Sciences

Conducts basic research on environmental health and environment-related diseases. Links to information on programs, grants, research, events, contracts, employment, training, outreach events, public information.

http://www.niehs.nih.gov/

Tox Town

Provides environmental health related resources and information. Site by the National Library of Medicine.

http://toxtown.nlm.nih.gov/