Dawson, 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 Dawson in Montana · Population: 8,874
TRI sites such as Thatcher Co of North Dakota Inc; SDWIS systems such as GLENDIVE CITY OF; FOREST PARK WATER RSID 24; HIGHLAND PARK UTILITIES ASSN anchor Dawson, MT's EPA extract. Derived burden score 17/100 (Low 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 Dawson include PINNACLE ESTATES OF GLENDIVE, while Thatcher Co of North Dakota Inc leads reported TRI pounds among local Form R filers. AQS median AQI 14 / peak 120 in 2024.
Burden score 17/100 (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 Dawson -- 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 Dawson, MT: EPA TRI 2023 reporting year
Same facilities, both years
-3.8%
1 facilities that filed in 2022 and 2023
Whole inventory
-3.8%
1.2 thousand lb → 1.2 thousand lb, every facility that filed
- Dawson, MT's total reported releases fell from 1.2 thousand lb in 2022 to 1.2 thousand lb in 2023, based on EPA TRI filings.
- Dawson, MT's air releases fell from 1.2 thousand lb in 2022 to 1.2 thousand lb in 2023, based on EPA TRI filings.
Air Quality History (2024–2024)
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 | 321 (90%) | 33 | 3 | 120 |
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 (6)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| GLENDIVE CITY OF | 4,873 | 0 |
| FOREST PARK WATER RSID 24 | 1,200 | 0 |
| HIGHLAND PARK UTILITIES ASSN | 500 | 0 |
| RICHEY TOWN OF | 180 | 0 |
| CASITAS DEL MESA MHP | 180 | 0 |
| PINNACLE ESTATES OF GLENDIVE | 50 | 14 |
TRI Facilities (1)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Thatcher Co of North Dakota Inc | 4.7K lbs |
Cities in Dawson (2)
Frequently Asked Questions
What is the environmental risk level in Dawson, Montana? ▼
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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.