Cascade, MT
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for Cascade in Montana · Population: 84,601
Cascade, MT is tracked across three EPA datasets covering 5 Toxics Release Inventory (TRI) facilities, 32 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 39/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 1.2M lbs of reported toxic releases under EPCRA Section 313, while 10 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 46 and a peak AQI of 74 in 2024, with 60% of observed days rated "Good" (0–50).
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
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 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 (32)
| System | Population | 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 | 1 |
| 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 |
| 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 |
Cities in Cascade (3)
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.