Many online resources contain valuable information about toxic chemicals; some of these are listed here. 

• ATSDR (Agency for Toxic Substances & Disease Registry) ToxFAQs: View factsheets that provide answers to the most frequently asked questions about hazardous substances found around hazardous waste sites and the effects of exposure on human health. Available in English and Spanish.

• Air Pollution and Health Risk: Find out how we know when a risk from a hazardous substance is serious. Learn how researchers estimate risk, and how the government uses this information to develop regulations that limit our exposure to hazardous substances.

• CDC's National Environmental Public Health Tracking Network: Find integrated health, exposure, and hazard information and data from a variety of national, state and city sources.

• Chemical Right-to-Know Collaborative Forum: Find TRI news, archived TRI webinars, and analyses of TRI and other environmental data.Exit

• EPA's Integrated Risk Information System (IRIS): View EPA human health assessment information for more than 550 chemical substances. The IRIS database contains descriptive and quantitative carcinogenic and non-carcinogenic health risk information.

• EPA's National Air Toxics Assessment (NATA): View EPA's ongoing comprehensive evaluation of air toxics in the U.S. NATA is a screening tool local, state and tribal agencies can use to prioritize pollutants, emission sources and locations of interest for further study in order to gain a better understanding of risks. The most recent version of NATA is from 2005.

• Evaluating Exposures to Toxic Air Pollutants: A Citizen's Guide: Learn how EPA determines how much of a toxic air pollutant people are exposed to and how many people are exposed.

• Health Effects Notebook for Hazardous Air Pollutants: Get detailed information about the health effects of hazardous air pollutants (HAPs) for nearly every HAP specified in the Clean Air Act Amendments of 1990.

• Learn the Issues: Chemicals and Toxics: Get information about common chemical substances and learn what EPA is doing to reduce the potential risks associated with them.

• Mercury in Your Environment: Learn more about mercury and what is being done to protect your health.

• Right-To-Know Network (RTKNET): Access TRI and other environmental information through various search options. Dataset is updated once a year and based on the final dataset used for the TRI National Analysis.Exit

• Risk Assessment for Toxic Air Pollutants: A Citizen's Guide: Find out about risk assessment, which is the process used to estimate the risk of illness from a specific human exposure to a toxic air pollutant.

• TOXNET (TOXicology data NETwork): Search a group of databases covering toxicology, hazardous chemicals, environmental health and related areas. TOXNET is provided by the National Library of Medicine (NLM).

• TOXMAP: Visually explore TRI and Superfund Program data by location, chemical, release medium/amount and facility name/ID. Map also overlays demographic, income and health data. This is a Geographic Information System (GIS).

• Tox Town: Interactively learn about commonly-encountered toxic substances, your health and the environment by searching for information about a neighborhood, location or chemical. Tox Town's target audience is students above elementary-school level, educators and the general public. Tox Town also offers some resources in Spanish.