TOXMAP uses the most current, final TRI data available from the EPA. 1987 is the first reporting year of the TRI program, but by industry convention, 1988 is the first year that TRI data is used for analysis. Data submission deadlines, data entry processes, and data quality control and review all influence the actual date of data release.

Prior to the final release of a given TRI release year, EPA at times publishes a preliminary dataset of the upcoming release data. However, TOXMAP does not add a release year until it is final.

A complete list of chemicals currently listed in TOXMAP TRI can be found at http://toxmap.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://www.epa.gov/tri/trichemicals/index.htm.

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.

For more information, see the TRI Fact Sheet.