EPA's Risk-Screening Environmental Indicators (RSEI) model estimates risk “scores” that represent relative chronic human health risk and can be compared to RSEI-generated scores from other years. RSEI scores are different from RSEI hazard estimates because they also consider the location of the release, its fate and transport through the environment, and the route and extent of potential human exposure. The following graph shows the trend in the RSEI score compared to the trend in the corresponding pounds of toxic chemical releases.

From 2005 to 2015:

• The overall RSEI score estimate decreased by 59%, while corresponding pounds released decreased by 46%. The large decrease in RSEI score between 2007 and 2009 was driven by a large decrease in chromium releases from three facilities. The slight increase in RSEI score (and RSEI hazard) from 2014 to 2015 is due to one large fugitive release to air of metal compounds in 2015.

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This page was published in January 2017 and uses the 2015 TRI National Analysis dataset made public in TRI Explorer in October 2016.

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