Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
LEWIS & CLARK STATION
35023 HWY 23, SIDNEY, MT, 59270
Parent company: MDU RESOURCES GROUP INC
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)) | Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Manganese compounds | Barium | Manganese | Total (lbs) |
| 2021 | 92 | — | 166 | — | — | 266 |
| 2020 | 225 | — | 444 | — | — | 688 |
| 2019 | 262 | — | 486 | — | — | 769 |
| 2018 | 219 | — | 409 | — | — | 647 |
| 2017 | 204 | — | 416 | — | — | 638 |
| 2016 | 229 | — | 448 | — | — | 698 |
| 2015 | 117,359 | 5,468 | 25,777 | — | — | 149,921 |
| 2014 | 28,501 | 27,026 | 6,833 | — | — | 63,071 |
| 2013 | 46,629 | 28,632 | 10,836 | — | — | 87,024 |
| 2012 | 30,895 | 25,163 | 7,063 | — | — | 63,815 |
| 2011 | 38,046 | 28,007 | 11,294 | — | — | 78,078 |
| 2010 | 36,691 | 28,880 | 8,457 | — | — | 74,728 |
| 2009 | 36,056 | 29,327 | 8,311 | — | — | 74,412 |
| 2008 | 38,092 | 28,952 | 8,781 | — | — | 76,579 |
| 2007 | 34,136 | 27,224 | 7,869 | — | — | 69,910 |
| 2006 | 47,079 | 29,027 | 10,852 | — | — | 87,860 |
| 2005 | 35,332 | 23,863 | 8,144 | — | — | 67,999 |
| 2004 | 31,150 | 29,161 | 7,181 | — | — | 68,132 |
| 2003 | 41,306 | 29,262 | 9,521 | — | — | 80,896 |
| 2002 | 36,000 | 26,900 | 8,234 | — | — | 71,758 |
| 2001 | 57,335 | 29,000 | 12,800 | — | — | 100,124 |
| 2000 | 42,300 | 30,000 | 10,050 | — | — | 82,457 |
| 1999 | — | 22,000 | — | 23,555 | 5,401 | 50,996 |
| 1998 | — | — | — | 35,305 | 8,154 | 45,359 |
▎ 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.