EPA-regulated facilities in Mountrail County, ND
There are 782 EPA-regulated facilities inside Mountrail County, North Dakota. The most common kinds are air emissions (464), water discharge (273), drinking water systems (35). 1 is currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 4 have a violation on record. Penalties over the last five years total $64M across 1 site.
Open the map of Mountrail County
By category
| Category | Facilities |
|---|---|
| Hazardous waste | 33 |
| Large quantity generators | 1 |
| Small quantity generators | 17 |
| Transporters | 1 |
| Chemical (RMP/TRI) | 13 |
| Air emissions | 464 |
| Major sources | 3 |
| Synthetic minor sources | 4 |
| Minor sources | 117 |
| Water discharge | 273 |
| Minor permits | 143 |
| Drinking water systems | 35 |
| Greenhouse gas reporters | 5 |
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.
- RIVERVIEW ESTATES WASTEWATER TREATMENT FACILITY Significant noncompliance
Largest penalties
Penalties assessed over the last five years.
- HENRY CHARGING USA 41-3H; HENRY CHARGING USA 31-3TFH $64M in penalties
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.