EPA-regulated facilities in Powder River County, MT
There are 100 EPA-regulated facilities inside Powder River County, Montana. The most common kinds are water discharge (79), hazardous waste (9), air emissions (7). 1 is currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 1 have a violation on record.
Open the map of Powder River County
By category
| Category | Facilities |
|---|---|
| Hazardous waste | 9 |
| Small quantity generators | 1 |
| Chemical (RMP/TRI) | 1 |
| Air emissions | 7 |
| Synthetic minor sources | 1 |
| Water discharge | 79 |
| Minor permits | 74 |
| Drinking water systems | 5 |
| Greenhouse gas reporters | 1 |
A facility enrolled in several programs counts once in the total and once in each of its categories.
In significant noncompliance
The EPA's designation for its most serious or persistent violations, as of the latest data.
- TOWN OF BROADUS WWTF Significant noncompliance
Bordering counties
- Big Horn County
- Campbell County, WY
- Carter County
- Crook County, WY
- Custer County
- Rosebud County
- Sheridan County, WY
Reading these numbers
These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.