Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
COLSTRIP STEAM ELECTRIC STATION
WILLOW AVE, COLSTRIP, MT, 59323
Parent company: NA
Carcinogen
PBT
— EPA classifications across all reporting years
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases in pounds (lbs) across all available years.
Full release table
Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.
| All values in pounds (lbs) | ||||||
|---|---|---|---|---|---|---|
| Year | Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | Manganese compounds | Barium And Barium Compounds | Manganese And Manganese Compounds | Vanadium compounds | Total (lbs) |
| 2024 | — | — | 5,068,010 | 1,009,580 | 94,393 | 6,711,928 |
| 2023 | — | — | 7,303,440 | 1,187,870 | 115,493 | 9,191,925 |
| 2022 | — | — | 6,326,110 | 1,358,860 | 114,842 | 8,370,464 |
| 2021 | — | — | 6,394,230 | 1,470,330 | 115,643 | 8,528,376 |
| 2020 | — | — | 5,714,130 | 1,119,930 | 92,422 | 7,441,077 |
| 2019 | 9,950,740 | 1,748,150 | — | — | 174,663 | 12,743,169 |
| 2018 | 4,548,280 | 1,646,000 | — | — | 160,843 | 7,116,974 |
| 2017 | 5,477,090 | 1,751,130 | — | — | 167,243 | 8,182,518 |
| 2016 | 5,191,380 | 1,742,140 | — | — | 186,453 | 7,956,334 |
| 2015 | 9,272,400 | 1,713,410 | — | — | 175,962 | 12,031,938 |
| 2014 | 9,037,700 | 1,633,190 | — | — | 164,002 | 11,641,637 |
| 2013 | 8,512,100 | 1,502,930 | — | — | 147,102 | 10,898,327 |
| 2012 | 7,770,500 | 1,372,810 | — | — | 143,742 | 10,017,458 |
| 2011 | 8,403,910 | 1,442,970 | — | — | 149,062 | 10,788,329 |
| 2010 | 10,479,100 | 1,792,760 | — | — | 184,201 | 13,408,821 |
| 2009 | 7,365,180 | 1,519,760 | — | — | 186,912 | 9,787,640 |
| 2008 | 8,791,390 | 1,879,760 | — | — | 225,202 | 11,796,804 |
| 2007 | 8,462,390 | 1,817,560 | — | — | 218,302 | 11,381,561 |
| 2006 | 8,164,280 | 1,742,260 | — | — | 208,602 | 10,935,263 |
| 2005 | 8,769,560 | 1,885,560 | — | — | 226,432 | 11,790,111 |
| 2004 | 8,614,085 | 1,832,055 | — | — | 219,102 | 11,573,712 |
| 2003 | 8,159,245 | 1,747,240 | — | — | 228,653 | 10,969,181 |
| 2002 | 7,212,865 | 1,549,865 | — | — | 275,505 | 9,814,262 |
| 2001 | 8,176,250 | 1,806,350 | — | — | 262,705 | 11,105,411 |
| 2000 | 7,770,255 | 1,705,755 | — | — | 209,505 | 10,485,331 |
| 1999 | 3,776,250 | 1,705,650 | — | — | — | 6,579,085 |
| 1998 | 3,877,250 | 1,805,850 | — | — | — | 6,847,555 |
▎ Facilities report to EPA's TRI once they manufacture, process, or use a listed chemical above set thresholds. Once that threshold is crossed, they must report actual releases regardless of size — so a small number reflects genuine low-level discharge, not a data error.