From the National Library of Medicine (NLM):
The Toxics Release Inventory (TRI), a resource of the US Environmental Protection Agency, is a set of publicly available databases containing information on releases of specific toxic chemicals and their management as waste, as reported annually by US industrial and federal facilities. This inventory was established under the Emergency Planning and Community Right to Know Act (EPCRA) of 1986. TRI’s data, beginning with the 1987 reporting year, covers air, water, land, and underground injection releases, as well as transfers to waste sites. In agreement with the Pollution Prevention Act of 1990, source reduction and recycling data is also included in TRI. The Toxicology and Environmental Health Information Program in the Division of Specialized Information Services of the NLM provides access to TRI as part of its TOXNET(r) (TOXicology Data NETwork) databases, which cover toxicology, hazardous chemicals, environmental health and related areas. TOXNET TRI and TOXMAP now include the TRI 2012 National Analysis data, the most current final TRI data available.
21,024 facilities reported to the TRI program in 2012 as required by EPCRA, with almost 80,000 submissions. A complete list of TRI chemicals required to be reported to the EPA can be found at http://www2.epa.gov/toxics-release-inventory-tri-program/tri-listed-chemicals. TOXMAP maps on-site TRI releases and also includes EPA Superfund data.