EPA-regulated facilities in Petroleum County, MT
There are 31 EPA-regulated facilities inside Petroleum County, Montana. The most common kinds are water discharge (29), air emissions (2), drinking water systems (1). 1 is currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 6 have a violation on record.
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By category
| Category | Facilities |
|---|---|
| Air emissions | 2 |
| Water discharge | 29 |
| Minor permits | 26 |
| Drinking water systems | 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.
- WINNETT WWTF Significant noncompliance
Bordering counties
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.