The following graph shows the 10-year trend in total disposal or other releases of TRI chemicals (also referred to as “total releases”). Many factors can affect trends in releases at facilities, including production rates, management practices, the composition of raw materials used, and the installation of control technologies.
Note: For comparability, trend graphs include only those chemicals that were reportable to TRI for all years presented.
From 2011 to 2020:
- Total disposal or other releases of TRI chemicals decreased by 27%.
- Reduced land disposal from metal mines and electric utilities, as well as reduced air emissions from electric utilities were the most significant contributors to the decline.
- Air releases decreased by 34%, on-site land disposal decreased by 27%, surface water discharges decreased by 13%, and off-site disposal decreased by 16%.
- The number of facilities that reported to TRI declined by 4%.
From 2019 to 2020:
- Total disposal or other releases decreased by 10%, mainly driven by a 10% decrease in land disposal.
- Quantities released into the air decreased by 9%, quantities transferred off site for disposal decreased by 18%, and quantities discharged into surface water decreased by 4%.
This page was published in March 2022 and uses the 2020 TRI National Analysis dataset made public in TRI Explorer in October 2021.