Hill, 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 Hill in Montana · Population: 16,260
SDWIS systems such as HAVRE CITY OF; ROCKY BOY'S RURAL WATER; HILL COUNTY WATER DISTRICTS anchor Hill, MT's EPA extract. Derived burden score 12/100 (Low Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
No TRI Form R facilities sit in Hill in this extract; water coverage still lists HAVRE CITY OF; ROCKY BOY'S RURAL WATER; HILL COUNTY WATER DISTRICTS. AQS monitors logged median AQI 15 / peak 123 in 2024.
Burden score 12/100 (Low 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 Hill -- 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.
Air Quality History (2023–2024)
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 | 314 (93%) | 23 | 2 | 123 |
| 2023 | 170 (79%) | 38 | 2 | 215 |
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 (13)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| HAVRE CITY OF | 9,921 | 10 |
| ROCKY BOY'S RURAL WATER | 2,000 | 1 |
| HILL COUNTY WATER DISTRICTS | 1,720 | 0 |
| ROCKY BOY AGENCY WATER SYSTEM | 1,442 | 1 |
| CHINOOK CITY OF | 1,300 | 11 |
| EAGLEMAN COMMUNITY WATER | 400 | 0 |
| EAST END COLONY INC | 100 | 0 |
| NORTH HAVRE COUNTY WATER DIST | 90 | 0 |
| HIDDEN VALLEY COLONY | 80 | 0 |
| HILLDALE COLONY | 79 | 0 |
| COOL SPRING COLONY | 75 | 0 |
| HARTLAND COLONY | 73 | 0 |
| GILDFORD COLONY | 70 | 0 |
Cities in Hill (6)
Frequently Asked Questions
What is the environmental risk level in Hill, Montana? ▼
Are there Superfund sites in Hill? ▼
How many toxic release facilities are in Hill? ▼
What is the air quality in Hill? ▼
Is the drinking water safe in Hill? ▼
What environmental agencies cover Hill? ▼
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.