Release Trend Region 7
The following graph shows the 10-year trend in quantities of TRI chemicals released by facilities located in Region 7.
Note: For comparability, trend graphs include only those chemicals that were reportable to TRI for all years presented.
Releases in Region 7 decreased from 2019 to 2020 primarily due to reduced land releases from electric utilities.
From 2011 to 2020:
- Releases in Region 7 decreased by 35.7 million pounds (-21%). This decrease was driven by reduced releases from the electric utilities, metal mining, and primary metals sectors. Nationally, releases decreased by 26%.
- Quantities of chemicals released to air, water, and land decreased while quantities transferred off site for disposal increased.
- Facilities in Region 7 reported releasing 132 million pounds of TRI chemicals.
- Since 2019, releases decreased by 11.5 million pounds (-8%). Releases decreased to all media except water. Nationally, releases decreased by 10%.
- 2020 was the first year facilities reported their releases and waste management practices for certain per- and polyfluoroalkyl substances (PFAS) to TRI. Six facilities in Region 7 reported for PFAS. Facilities in the region managed 1,489 pounds of PFAS as waste and released 543 pounds of PFAS.
Releases by State
The following chart shows each state’s contribution to the region’s TRI chemical release quantities for 2020.
To consider the potential health risk from chronic exposure to these releases, EPA uses a risk-screening score from the RSEI model. The following chart shows each state’s contribution to the region’s TRI chemical release quantities for 2020.
- The RSEI model accounts for factors such as a chemical's toxicity, its movement in the environment, and population density, in addition to the pounds of TRI chemicals released. RSEI models releases to the air and water but does not model land disposal quantities. These factors can lead to significant differences between a state’s contribution to regional releases and its contribution to the regional RSEI Score.
For information on the Region 7 facilities with the largest releases, see the Region 7 TRI Factsheet.
This page was published in March 2022 and uses the 2020 TRI National Analysis dataset made public in TRI Explorer in October 2021.