What if there are changes to the TRI program that affect a trend calculation?
At this time, TOXMAP’s trend calculation does not account for changes to the TRI program’s release or waste management data. Therefore, an apparent increase or decrease in on-site releases may actually reflect a change in TRI chemical reporting requirements. We intend to change TOXMAP to take some or all of these reporting requirement changes into account in an upcoming version of TOXMAP. See the EPA’s Making Year-to-Year Comparisons of TRI Data (http://www.epa.gov/triexplorer/yearsum.htm) for more details.
