ATSDR ToxFAQs is a series of summaries about hazardous substances being developed by the ATSDR Division of Toxicology. Information for this series is excerpted from the ATSDR Toxicological Profiles and Public Health Statements. Each fact sheet serves as a quick and easy to understand guide. Answers are provided to the most frequently asked questions (FAQs) about exposure to hazardous substances found around hazardous waste sites and the effects of exposure on human health. 
To find out more, go to ToxFAQs.
 

To search in ToxFAQs and PHSs, go to Keyword Search of All ToxFAQs.
 

By Congressional mandate, the Agency for Toxic Substances and Disease Registry (ATSDR) produces "toxicological profiles" for hazardous substances found at National Priorities List (NPL) sites. These hazardous substances are ranked based on frequency of cocurrence at NPL sites, toxicity, and potential for human exposure. Toxicological profiles are developed from a priority list of 275 substances. 
To find out more, go to Toxicological Profiles.
 

This lets you search for a specific chemical to see if it's at a site in your community. 
To search, go to Internet HazDat - Site Contaminant Query.