Cascade, 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.
Environmental data for Cascade in Montana · Population: 84,601
TRI sites such as Big Sky Scientific L.L.C.; Calumet Montana Refining Llc.; US Dod Usaf Malmstrom Afb; SDWIS systems such as SUN PRAIRIE VILLAGE COUNTY; BLACK EAGLE CASCADE COUNTY WATER SEWER; PRAIRIE WATER COMPANY; NPL sites such as ACM Smelter and Refinery; Carpenter Snow Creek Mining District anchor Cascade, MT's EPA extract. Derived burden score 49/100 (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 Cascade include BLACK EAGLE CASCADE COUNTY WATER SEWER; HOMESTEAD ACRES COUNTY WATER AND SEWER; BUSHARD WATER COMPANY, while Big Sky Scientific L.L.C. leads reported TRI pounds among local Form R filers. AQS median AQI 46 / peak 74 in 2024.
Burden score 49/100 (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 Cascade -- 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 Cascade, MT: EPA TRI 2023 reporting year
Same facilities, both years
-9.0%
4 facilities that filed in 2022 and 2023
Whole inventory
-9.0%
448.2 thousand lb → 407.7 thousand lb, every facility that filed
- Cascade, MT's total reported releases fell from 448.2 thousand lb in 2022 to 407.7 thousand lb in 2023, based on EPA TRI filings.
- Cascade, MT's off-site transfers fell from 3.2 thousand lb in 2022 to 526 lb in 2023, based on EPA TRI filings.
- Cascade, MT's land releases rose from 2.1 thousand lb in 2022 to 3.6 thousand lb in 2023, based on EPA TRI filings.
- Cascade, MT's air releases fell from 442.8 thousand lb in 2022 to 403.6 thousand 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 | 52 (60%) | 35 | 0 | 74 |
| 2023 | 176 (50%) | 169 | 5 | 170 |
| 2022 | 323 (90%) | 34 | 2 | 128 |
| 2021 | 296 (81%) | 58 | 9 | 160 |
| 2020 | 314 (87%) | 42 | 3 | 115 |
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 (33)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| SUN PRAIRIE VILLAGE COUNTY | 1,800 | 0 |
| BLACK EAGLE CASCADE COUNTY WATER SEWER | 1,233 | 4 |
| PRAIRIE WATER COMPANY | 1,000 | 0 |
| CASCADE TOWN OF | 650 | 0 |
| BELT TOWN OF | 600 | 0 |
| VAUGHN CASCADE COUNTY WATER AND SEWER | 585 | 0 |
| TWO BUTTES WATER USERS ASSN | 525 | 0 |
| GORE HILL COUNTY WATER DIST | 500 | 0 |
| HOMESTEAD ACRES COUNTY WATER AND SEWER | 500 | 2 |
| BUSHARD WATER COMPANY | 425 | 2 |
| HIGHWOOD MOBILE HOME PARK | 400 | 0 |
| SUN PRAIRIE WATER DISTRICT | 350 | 0 |
| GREAT FALLS RV PARK | 274 | 0 |
| NEIHART TOWN OF | 229 | 1 |
| STOCKETT WATER AND SEWER DIST | 210 | 1 |
| SOUTH WIND WATER AND SEWER DISTRICT | 200 | 7 |
| TRACY WATER USERS CORP | 200 | 0 |
| SAND COULEE WATER USERS DISTRICT | 180 | 2 |
| BIG STONE COLONY INC | 130 | 0 |
| PLEASANT PARK COMMUNITY INC | 125 | 0 |
| PLEASANT VALLEY COLONY | 120 | 0 |
| CASCADE COLONY | 105 | 0 |
| FAIRHAVEN COLONY | 105 | 0 |
| BIG BEND RANCH SUBDIVISION | 100 | 4 |
| HILLTOP COLONY | 100 | 0 |
| SPRING TREE RIDGE | 80 | 1 |
| GRASSLAND COLONY | 80 | 0 |
| SAWTOOTH VILLA | 70 | 1 |
| PARK GARDEN ESTATES | 50 | 0 |
| WINDY ACRES WUA | 50 | 0 |
| BIG SKY MOBILE HOME PARK | 40 | 0 |
| RICEVILLE HEIGHTS SUBDIVISION | 25 | 0 |
| HIGH PLAINS H2O LLC | 25 | 0 |
TRI Facilities (5)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Big Sky Scientific L.L.C. | 626.5K lbs |
| 2 | Calumet Montana Refining Llc. | 607.1K lbs |
| 3 | US Dod Usaf Malmstrom Afb | 13.2K lbs |
| 4 | Chs Great Falls Feed | 0 lbs |
| 5 | US Dod Usaf 120 Aw Montana Ang (range) | 0 lbs |
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| ACM Smelter and Refinery | NPL Site | 54.26 |
| Carpenter Snow Creek Mining District | NPL Site | 50.00 |
Cities in Cascade (12)
Frequently Asked Questions
What is the environmental risk level in Cascade, Montana? ▼
Are there Superfund sites in Cascade? ▼
How many toxic release facilities are in Cascade? ▼
What is the air quality in Cascade? ▼
Is the drinking water safe in Cascade? ▼
What environmental agencies cover Cascade? ▼
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.