Facilities with ten or more full-time employees that process more than 25,000 pounds in aggregate, or use greater than 10,000 pounds of any one TRI chemical, are required to report releases annually. The US Environmental Protection Agency (EPA) (http://www.epa.gov) maintains this information in the Toxics Release Inventory (TRI) (http://www.epa.gov/tri/). The toxics release files on the National Library of Medicine's® (NLM) Toxicology Data Network (TOXNET®) (http://toxnet.nlm.nih.gov) come from TRI.
TOXMAP uses the most current, final TRI data available from the EPA. Data submission deadlines, data entry processes, and data quality control and review all influence the actual date of data release by both the EPA and by TOXMAP.
A complete list of the TRI chemicals currently listed in TOXMAP can be found at http://toxmap-classic.nlm.nih.gov/toxmap/main/chemicals.jsp. 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.
NOTE: At this time, TOXMAP uses reported on-site releases only. Some TRI chemicals have no reported releases, and so will not appear in the TRI release data or in TOXMAP. All release amounts are reported in pounds except dioxin which is reported in grams.
For more information, see the TRI Fact Sheet (http://www.nlm.nih.gov/pubs/factsheets/trifs.html).