The US Environmental Protection Agency (EPA) provides this database of chemical toxicity. Three individual EPA databases are combined to provide information on chemical-specific toxicity values for aquatic and terrestrial plants and animals. Users can search for research reports by chemical name, species name, or environmental effect. The site has informative help files and browse features. This...

HazDat, the Agency for Toxic Substances and Disease Registry's Database, is a scientific and administrative database designed "to provide access to information on the release of hazardous substances from Superfund sites or from emergency events and on the effects of hazardous substances on the health of human populations." Most recently updated in mid-January, 1998, the HazDat database includes...

Created by the U.S. National Library of Medicine, the Toxicology Data Network (TOXNET) is a fine resource for searching databases on toxicology, hazardous chemicals, environmental health, and toxic releases. On the site, visitors can look over the Most Visited databases to get started, or are welcome to use common popular searches. All told, there are over a dozen high quality databases assembled...