TRI Facilities
79
Moderate
MT · EPA TRI · SDWIS · Superfund
Montana environmental disclosure record
According to EPA's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List extracts, this is Montana's full public registry profile, toxic releases, drinking-water systems, and Superfund sites in one place.
- TRI facilities
- 79
- Reported releases
- 276.8M lbs
- #15 of 56
- Water systems
- 818
- Superfund NPL sites
- 19
Montana vs. every U.S. state
Cumulative TRI-reported release pounds, with this state marked in the national distribution
277M lbs Top 27% higher than 73% of 56 states with TRI reporters
Each bar is a $1M-wide band; taller bars hold more states with TRI reporters. 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
MT regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
- RCRA · Subtitle C 19
What this shows Counts are mapped to statute as a structural proxy and reflect reported activity, not toxicity-weighted or population-adjusted risk. Clean Air Act (Title V) permit data is not currently ingested by this portal, so air-permit compliance is not shown here.
How Montana compares across two EPA disclosure measures
The highlighted point is Montana. The vertical axis is the share of tracked water systems with at least one health-based SDWIS record; the horizontal axis is TRI-reported pounds per facility on a logarithmic scale so the full state distribution stays readable. The crosshairs use the portal’s published national benchmark medians.
This matrix compares disclosure rates, not toxicity, exposure, current compliance, or drinking-water safety. A lower position on either axis is not a safety rating; use the underlying facility and water-system records for context.
According to EPA TRI, SDWIS, and Superfund NPL extracts, Montana (MT) lists 79 TRI-reporting facilities disclosing 276.8M lbs of toxic releases. The same extracts list 19 Superfund sites and 818 EPA-regulated water systems, of which 201 carry health-based SDWIS violation rows. PlainEnviro's composite environmental health score for Montana is 44/100 (grade F), benchmarked against all U.S. states on chemical release intensity, drinking-water health violations, Superfund site burden, and water violation rate. This is a percentile-derived composite from federal disclosure counts, not a clinical health-risk assessment.
F 44
Montana Environmental Health Score
A percentile-benchmarked 0–100 composite from 4 EPA federal datasets, with weight redistribution for any unavailable dimension
Chemical Release Intensity F 22
3.5M (lbs per facility) Drinking Water Health Violations C 76
24.6% (% of systems) Superfund Site Burden F 5
24.1 (sites per 100 facilities) Water Violation Rate C 70
2.0 (violations per system) Benchmarks derived from EPA TRI, SDWIS, and Superfund NPL extracts across all 56 U.S. states and territories
Water Systems
818
Moderate
Superfund Sites
19
Moderate
Total Releases
276.8M lbs
Very high
Compliance Snapshot - MT
Sites with no recorded health violations 77.6%
Sites with at least one open violation 22.4%
Montana's profile joins three independently maintained EPA programs into one statewide record: the Toxics Release Inventory (TRI, EPCRA Section 313 industrial disclosures), the Safe Drinking Water Information System (SDWIS, Safe Drinking Water Act compliance), and the Superfund National Priorities List. Each program uses its own reporting cadence and facility-identification scheme; PlainEnviro joins them by matched facility and system location rather than a shared federal ID, so a site absent from one program is never assumed absent from another. The counts below reflect the portal's rebuild as of August 2026.
Activity clusters in counties such as Flathead, Missoula, Yellowstone, which account for the highest combined facility, water-system, and Superfund presence. Monitoring and reporting violations are not included in the SDWIS counts shown here.
Every figure reflects the public regulatory record as filed with the U.S. Environmental Protection Agency and is not weighted for toxicity, geographic footprint, or population exposure. A state can rank high in any individual metric because of industrial history, naturally occurring contaminants in source water, or simply the number of reporting facilities, not because current residents face unsafe conditions. Drill into any county or water system below for the full disclosure record.
What does this state's environmental record show?
TRI Facilities
79
Water Systems
818
Superfund Sites
19
Health-Based Violation Records
1,604
Total Releases
276.8M lbs
cumulative, all reported years
Systems with Records
201
water systems
Release-over-release change
What changed for Montana: EPA TRI 2023 reporting year
Same facilities, both years
+198.1%
65 facilities that filed in 2022 and 2023
Whole inventory
+0.1%
52.3 million lb → 52.4 million lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 3 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Montana's water releases rose from 19.8 thousand lb in 2022 to 59.1 thousand lb in 2023, based on EPA TRI filings.
- Montana's off-site transfers rose from 630.2 thousand lb in 2022 to 717.6 thousand lb in 2023, based on EPA TRI filings.
- Montana's air releases fell from 1.8 million lb in 2022 to 1.7 million lb in 2023, based on EPA TRI filings.
Largest Polluters
View all →Water Quality
Systems with Health Violations
| Water System | Population | Violations |
|---|---|---|
| FORT BELKNAP AGENCY WATER SYSTEM | 2,600 | 211 |
| DENTON TOWN OF | 255 | 162 |
| WHITEHALL TOWN OF | 1,500 | 91 |
| HARLEM CITY OF | 820 | 71 |
| BEAVERHEAD JACKSON WATER AND SEWER DIST | 58 | 62 |
| ST LABRE INDIAN SCHOOL | 650 | 60 |
| CROW AGENCY WATER SYSTEM | 2,057 | 53 |
| KING RANCH COLONY | 56 | 38 |
| PHILIPSBURG TOWN OF | 1,360 | 30 |
| NCMRWA TIBER SERVICE AREA | 200 | 29 |
| RICHLAND CO VALLEY VIEW WUA | 85 | 28 |
| CLARKS LOOKOUT | 62 | 26 |
| BLUE CLOUD SUBDIVISION | 60 | 26 |
| ARROW CREEK TRAILER COURT | 75 | 22 |
| BLUE SKY HEIGHTS WUA CLANCY | 250 | 20 |
| TURNER COLONY | 50 | 20 |
| RIVERVIEW COLONY | 130 | 20 |
| HYSHAM TOWN OF | 262 | 19 |
| BEE HIVE HOMES MSLA | 106 | 19 |
| TIBER COUNTY WATER DISTRICT | 750 | 17 |
Cities with Water Issues
Missoula
75 water systems
Kalispell
71 water systems
Helena
40 water systems
Billings
39 water systems
Bozeman
28 water systems
Columbia Falls
27 water systems
Great Falls
18 water systems
East Helena
18 water systems
Pablo
18 water systems
Bigfork
17 water systems
Belgrade
12 water systems
Big Sky
12 water systems
Hamilton
10 water systems
Polson
10 water systems
Clancy
9 water systems
Cut Bank
9 water systems
Libby
9 water systems
Stevensville
9 water systems
Browning
8 water systems
Dillon
7 water systems
Superfund Sites (19)
| Site Name | Status | HRS Score |
|---|---|---|
| ACM Smelter and Refinery | NPL Site | 54.26 |
| Anaconda Aluminum Co Columbia Falls Reduction Plant | NPL Site | 68.39 |
| Anaconda Co. Smelter | NPL Site | 58.71 |
| Barker Hughesville Mining District | NPL Site | 50.00 |
| Basin Mining Area | NPL Site | 61.15 |
| Billings PCE | NPL Site | 50.00 |
| Carpenter Snow Creek Mining District | NPL Site | 50.00 |
| East Helena Site | NPL Site | 61.65 |
| Flat Creek IMM | NPL Site | 51.33 |
| Idaho Pole Co. | NPL Site | 38.29 |
| Libby Asbestos | NPL Site | 0.00 |
| Libby Ground Water Contamination | NPL Site | 37.67 |
| Lockwood Solvent Ground Water Plume | NPL Site | 45.69 |
| Milltown Reservoir Sediments | NPL Site | 43.78 |
| Montana Pole and Treating | NPL Site | 33.03 |
| Mouat Industries | NPL Site | 31.66 |
| Silver Bow Creek/Butte Area | NPL Site | 63.76 |
| Smurfit-Stone Mill | Proposed NPL Site | 50.00 |
| Upper Tenmile Creek Mining Area | NPL Site | 50.00 |
Counties (57 total)
| County | Facilities |
|---|---|
| Flathead | 5 |
| Missoula | 4 |
| Yellowstone | 18 |
| Lewis And Clark | 5 |
| Gallatin | 4 |
| Lake | 0 |
| Cascade | 5 |
| Ravalli | 2 |
| Lincoln | 1 |
| Madison | 0 |
| Glacier | 1 |
| Jefferson | 3 |
| Park | 0 |
| Toole | 2 |
| Hill | 0 |
| Sanders | 2 |
| Chouteau | 0 |
| Beaverhead | 1 |
| Carbon | 0 |
| Fergus | 0 |
Showing top 20 counties by environmental activity. Montana has 57 counties total.
Cities with Environmental Records
Billings
15 facilities · 39 water systems
Butte
5 facilities · 2 water systems
Missoula
4 facilities · 75 water systems
Kalispell
4 facilities · 71 water systems
Helena
3 facilities · 40 water systems
Great Falls
3 facilities · 18 water systems
Laurel
3 facilities · 5 water systems
Sidney
3 facilities · 3 water systems
Belgrade
2 facilities · 12 water systems
Clancy
2 facilities · 9 water systems
Miles City
2 facilities · 5 water systems
Anaconda
2 facilities · 4 water systems
Columbus
2 facilities · 4 water systems
Thompson Falls
2 facilities · 3 water systems
Townsend
2 facilities · 3 water systems
Colstrip
2 facilities · 1 water systems
Bozeman
1 facilities · 28 water systems
Columbia Falls
1 facilities · 27 water systems
East Helena
1 facilities · 18 water systems
Hamilton
1 facilities · 10 water systems
Frequently Asked Questions
How many TRI facilities are in Montana? ▼
Montana has 79 facilities that report to the EPA Toxic Release Inventory (TRI). These facilities have collectively reported 276.8M lbs in total toxic chemical releases. TRI data is self-reported annually by facilities that manufacture, process, or use listed toxic chemicals above threshold amounts.
Does Montana have Superfund sites? ▼
Yes, Montana has 19 sites on the EPA Superfund National Priorities List (NPL). Superfund sites are contaminated locations identified for long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
What does EPA SDWIS list for drinking water in Montana? ▼
Montana has 818 EPA-regulated water systems in the Safe Drinking Water Information System (SDWIS) extract used here. 201 water systems have a health-based violation row (MCL exceedance) in this historical extract. A past registry row is not a current drinkability verdict. For current utility conditions, contact the local water utility or the Montana drinking water program. Source: EPA SDWIS.
What environmental data is available for Montana? ▼
PlainEnviro provides three categories of EPA environmental data for Montana: Toxic Release Inventory (TRI) data covering 79 industrial facilities, Safe Drinking Water Information System (SDWIS) data for 818 water systems, and Superfund National Priorities List (NPL) data for 19 contaminated sites.
How does Montana compare to other states on EPA disclosure counts? ▼
Montana has 79 TRI facilities with 276.8M lbs in total releases, 19 Superfund sites, and 1,604 water system violations on record. These are federal disclosure counts; they are not toxicity-weighted or population-adjusted risk scores. Source: EPA TRI, SDWIS, and Superfund NPL databases.
What is Montana's environmental health score? ▼
PlainEnviro's composite environmental health score for Montana is 44/100 (grade F). This score combines four percentile-benchmarked dimensions from EPA federal extracts: chemical release intensity per TRI facility, drinking-water health violation rate from SDWIS, Superfund site burden relative to industrial activity, and overall water violation rate. Scores are benchmarked against all 56 U.S. states and territories. When a dimension lacks data, its weight redistributes to the remaining dimensions so the score never deflates from missing inputs. This is a registry-count composite, not a clinical exposure or health-outcome assessment.
Explore More Data for Montana
TRI Facilities in Montana →
Every toxic-release facility reporting in the state, ranked by volume
Drinking Water Systems in Montana →
Community water systems and their violation records
Air Quality in Montana →
County-level AQI from EPA monitoring stations
Compare states by burden →
EJ screening scores for every U.S. county
State environmental rankings →
How states compare on releases, water and Superfund
Browse all states →
Environmental profiles for every U.S. state
About This Data
This page aggregates environmental data from three EPA programs for Montana: the Toxic Release Inventory (TRI) for industrial chemical releases, the Safe Drinking Water Information System (SDWIS) for water quality, and the Superfund National Priorities List (NPL) for hazardous waste cleanup sites.
PlainEnviro presents this data without advocacy framing. Numbers reflect reported data and may not capture all environmental activity. For specific health or environmental concerns, contact your state environmental agency.
What to do with Montana's data
Use this state profile as a starting point, then drill into the specific dataset that matters to you.
- Check the 79 TRI facilities reporting in Montana for the largest reported releases near a specific county. View facilities
- 201 water systems in the state have a recorded health-based violation, check if yours is one of them. Check water systems
- See how Montana compares to other states on releases, water violations, and Superfund sites. State rankings
Reported data reflects what facilities and agencies disclose to the EPA; it is not a complete measure of environmental risk or a substitute for local guidance.
Use and verify this record
Montana's profile brings together EPA release, drinking-water, and Superfund records. It reports the underlying programs without making a health or environmental-risk determination.
State environmental figures are computed directly from EPA data. The methodology records the joins, definitions, and refresh cadence for each program.
PlainEnviro renders public EPA records directly from its data pipeline; no figure on this page is typed in by an editor. See the editorial standards and corrections policy for how source changes and reported errors are handled.