Silver Bow, MT
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Silver Bow in Montana · Population: 35,589
TRI sites such as Montana Resources LLC; Solvay USA LLC Silver Bow Plant; Rec Silicon; SDWIS systems such as BUTTE SILVERBOW WATER DEPT; RAMSAY WATER AND SEWER DISTRICT; GALEN FACILITY; NPL sites such as Montana Pole and Treating anchor Silver Bow, MT's EPA extract. Derived burden score 38/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Silver Bow include BUTTE SILVERBOW WATER DEPT, while Montana Resources LLC leads reported TRI pounds among local Form R filers. AQS median AQI 31 / peak 168 in 2024.
Burden score 38/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Silver Bow -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Silver Bow, MT: EPA TRI 2023 reporting year
Same facilities, both years
-2.0%
4 facilities that filed in 2022 and 2023
Whole inventory
-2.1%
41.0 million lb → 40.1 million lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Silver Bow, MT's total reported releases fell from 41.0 million lb in 2022 to 40.1 million lb in 2023, based on EPA TRI filings.
- Silver Bow, MT's off-site transfers rose from 18 lb in 2022 to 37 lb in 2023, based on EPA TRI filings.
- Silver Bow, MT's air releases rose from 357 lb in 2022 to 371 lb in 2023, based on EPA TRI filings.
- Silver Bow, MT's land releases fell from 41.0 million lb in 2022 to 40.1 million lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 258 (70%) | 103 | 3 | 168 |
| 2023 | 268 (73%) | 94 | 3 | 124 |
| 2022 | 268 (73%) | 87 | 8 | 162 |
| 2021 | 256 (70%) | 89 | 14 | 163 |
| 2020 | 289 (79%) | 69 | 5 | 181 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Montana, see the EPA's AirNow.gov.
Water Systems (3)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| BUTTE SILVERBOW WATER DEPT | 33,000 | 1 |
| RAMSAY WATER AND SEWER DISTRICT | 97 | 0 |
| GALEN FACILITY | 90 | 0 |
TRI Facilities (5)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Montana Resources LLC | 215.2M lbs |
| 2 | Solvay USA LLC Silver Bow Plant | 60.0K lbs |
| 3 | Rec Silicon | 25.4K lbs |
| 4 | Montana Precision Products LLC | 614 lbs |
| 5 | Ergon Asphalt & Emulsions Inc. - Butte | 0 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Montana Pole and Treating | NPL Site | 33.03 |
Cities in Silver Bow (2)
Frequently Asked Questions
What is the environmental risk level in Silver Bow, Montana? ▼
Are there Superfund sites in Silver Bow? ▼
How many toxic release facilities are in Silver Bow? ▼
What is the air quality in Silver Bow? ▼
Is the drinking water safe in Silver Bow? ▼
What environmental agencies cover Silver Bow? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.