Environmental Contaminants Encyclopedia The National Park Service provides this site. Comprehensive, detailed information on all toxics. Requires Adobe Acrobat to view. Higher level audiences would probably benefit more.

Superfund Program-US EPA Superfund website, with links to every superfund site in the nation. Also links to policy pages, toxicity pages, and cleanup mechanisms.

Toxic Metals Backgrounder Overview of hazards of toxic metals. Provides more background to other metals besides arsenic, such as lead and chromium. Text adapted from a Handbook to Journalists.

ATSDR-Hazardous Substances Fact Sheets FAQ sheets on anything toxic imaginable, including arsenic and all other heavy metals. Produced by the Agency for Toxic Substances and Disease Registry.

Eco-USA Managed by a chemist from Indiana who previously worked for the Indiana Department of Environmental Management. It has comprehensive listings of contamination sites, environmental agencies, and national parks as well as environment-related news articles. Also provides excerpts from articles posted by the U.S. Agency for Toxic Substances and Disease Registry (ATSDR) on several toxic metals, chemicals and substances. It is more accessible than the ASTDR website and is a good place for general information and useful links.

Toxicology Tutorials — National Library of Medicine, U.S. Department of Health and Human Services The Toxicology Tutorials are a set of three instructional units written at the introductory college student level covering the basic principles of toxicology. The tutorials include a basic introduction to terms such as "dose-response" and "risk assessment"; a unit on toxicokinetics (how a substance gets into the body and what happens to it) and a unit on cellular toxicology (the toxic mechanisms that operate at the cell level). The Toxicology and Environmental Health Information Program of the National Library of Medicine, U.S. Department of Health and Human Services produced the tutorials. The site is intended to provide a basic understanding of toxicology as an aide for users of toxicology literature contained in the National Library of Medicine's Chemical and Toxicological databases.

Metals in Health and Disease — University of Edinburgh This site was produced by a group of students from the College of Medicine and Veterinary Medicine at the University of Edinburgh, Scotland as a class assignment. Well researched, it gives information on metals in nutrition, in medical diagnosis, and as drugs and toxins.

Center for Air Toxic Metals — Energy and Environmental Research Center, University of North DakotaThe United States Environmental Protection Agency designated the Energy and Environmental Research Center of the University of North Dakota as the Center for Air Toxic Metals, in order to develop sufficient information to devise effective regulations for the Clean Air Act. By amassing international and multidisciplinary data and technologies, the CATM has become a world leader in air pollution control, mainly from energy and incendiary sources. Available on the site are all issues of the CATM newsletter, as well as the entire downloadable database.