EPA TRI Facility · Electric Utilities
Colstrip Steam Electric Station
Colstrip, MT
- Total releases
- 46.3M lbs
- Chemicals reported
- 38
- Carcinogens
- 14
- Primary pathway
- Land Disposal
LAND Form-R mix
Colstrip Steam Electric Station: how the 46.3M lbs splits
46.3M lbs across all reported pathways
- Land Disposal 45.0M lbs 97.1%
- Air Releases 1.3M lbs 2.8%
- Off-site Transfers 33.7K lbs 0.1%
Colstrip Steam Electric Station's 46.3M lbs Form-R total is LAND - land disposal is 97.1% of the bar. Next segment: air releases at 2.8%. Leading chemical by pounds: Barium And Barium Compounds.
Carcinogen-classified pounds vs other reported pounds
Same cumulative TRI total as above, split by EPA/IARC carcinogen classification on each chemical: pounds share, not chemical count. Classification is not a site health-risk score.
HEAVY volume LAND pathway CARC-LEAN
Colstrip Steam Electric Station is an EPA Toxics Release Inventory reporter in Colstrip, MT, in the electric utilities sector. It reported 9.2M lbs of releases across 22 chemicals in 2023, and 46.3M lbs in total across its 2019-2023 reporting years. That ranks 37 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Montana's 67 reporting TRI sites, pounds #1 is not chemical-count #1. Colstrip Steam Electric Station is pounds #2 and chemical-count #2 at 46.3M lbs. Montana Resources LLC leads reported pounds (215.2M lbs) at 12 chemicals (chemical-count #11). Phillips 66 Co Billings Refinery leads chemical count at 39 chemicals (465.0K lbs, pounds #16). Reported volume rose against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Colstrip Energy LP Rosebud Power Plant; Hardin Generating Station; Pfp Industries LLC - Miles City Mt Facility; Decker Coal Co. Similar-scale Electric Utilities peers outside Montana: Prairie State Generating Co; Harrison Power Station; Gavin Power LLC; Minnkota Power Cooperative Inc. Milton R. Young Station. Largest disclosed chemicals by pounds: Barium And Barium Compounds; Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Manganese And Manganese Compounds; Manganese compounds.
Colstrip Steam Electric Station stamps HEAVY volume with a dominant LAND pathway (97.1% land disposal) across 38 chemicals · 14 carcinogen-classified. Cumulative Form-R extract: 46.3M lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Prairie State Generating Co and Harrison Power Station.
Colstrip Steam Electric Station vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
46M lbs Top 1% higher than 100% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Colstrip Steam Electric Station inside Rosebud's TRI pounds
Among the 513 Electric Utilities facilities in this database, Colstrip Steam Electric Station reports the 2nd-largest volume, placing it in the top 0.4% of its sector. This one site accounts for 98.1% of every pound reported in Rosebud. Scale peers outside Montana include Prairie State Generating Co and Harrison Power Station.
County-dominant here means ≥25% of Rosebud's reported pounds (47.2M lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Colstrip Steam Electric Station's total reported releases rose from 8.4 million lb in 2022 to 9.2 million lb in 2023, based on EPA TRI filings.
- Colstrip Steam Electric Station's off-site transfers rose from 63 lb in 2022 to 1.5 thousand lb in 2023, based on EPA TRI filings.
- Colstrip Steam Electric Station's land releases rose from 8.1 million lb in 2022 to 8.9 million lb in 2023, based on EPA TRI filings.
- Colstrip Steam Electric Station's chemicals reported fell from 23 in 2022 to 22 in 2023, based on EPA TRI filings.
Colstrip Steam Electric Station Form-R facts
Compare this facility
See how Colstrip Steam Electric Station stacks up against nearby facilities and the typical reporter.
50.5× more than the comparison
2.4× more than the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Colstrip Steam Electric Station releases toxic chemicals into the environment. Total: 46.3M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 28% (12.8M lbs to 9.2M lbs).
Colstrip Steam Electric Station: annual Form-R pounds
HEAVY site · LAND pathway · TRI years 2019–2023
- 2019
- 2020
- 2021
- 2022
- 2023
What this shows Colstrip Steam Electric Station year-over-year reported totals (decreased by 28% from 2019 to 2023). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: Barium And Barium Compounds.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 12.8M lbs | 27 |
| 2020 | 7.4M lbs | 22 |
| 2021 | 8.5M lbs | 22 |
| 2022 | 8.4M lbs | 23 |
| 2023 | 9.2M lbs | 22 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 14 of 38 chemicals are carcinogens. Sorted by total release volume.
Colstrip Steam Electric Station · LAND-pathway site
Nearest TRI Facilities to Colstrip Steam Electric Station
Closest other reporters in Montana - including Colstrip Energy LP Rosebud Power Plant, Hardin Generating Station, Pfp Industries LLC - Miles City Mt Facility, ordered by distance.
Showing 8 of 66 other reporting facilities in Montana.
Similar Electric Utilities Facilities
Other Electric Utilities facilities with similar total release volumes (±80%), outside Montana - e.g. Prairie State Generating Co, Harrison Power Station, Gavin Power LLC.
Compare beyond Montana
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Colstrip Steam Electric Station on cumulative reported pounds (46.3M lbs) and distinct chemical count (38). Release-pound peers include Buick Mine/mill, Pinto Valley Mine, Befesa Zinc Metal LLC. Chemical-count peers include Monroe Energy Llc-Trainer Refinery, Ohio Refining Co, Citgo Petroleum Corp. Neighborhoods are forced disjoint so each axis surfaces a different set of sites.
Similar reported release pounds
Nearest out-of-state reporters (≥1,000 lbs) by absolute TRI pounds, not same-industry or same-county neighbors.
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include Barium And Barium Compounds, Barium compounds (except for barium sulfate (CAS No. 7727-43-7)), Manganese And Manganese Compounds, Manganese compounds; nearby reporters include Colstrip Energy LP Rosebud Power Plant. Colstrip Steam Electric Station stamps HEAVY volume · LAND pathway · CARC-LEAN carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Colstrip Steam Electric Station TRI extract (HEAVY · LAND · CARC-LEAN · lead Barium And Barium Compounds) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Colstrip Steam Electric Station totals are self-reported EPCRA §313 estimates for Colstrip, MT, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 221112 · Electric Utilities. 98.1% of Rosebud TRI pounds in this extract. Nearest ABS peer: Buick Mine/mill (Δ 1.9M lbs). Pounds ≠ exposure.
Colstrip Steam Electric Station stamps HEAVY volume · LAND pathway · CARC-LEAN · lead Barium And Barium Compounds. PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov