Mckenzie County contains 124 EPA-regulated facilities, 9 of which are currently flagged for significant noncompliance. The county also hosts 0 Superfund sites and 10 TRI chemical reporters. EPA has assessed $68.5M in lifetime penalties and TRI reporters disclosed roughly 12.2M lb of on-site releases. That facility count is well above the North Dakota state average of 29 per county.
| Facility | City | On-site (lb) | Status |
|---|---|---|---|
| Oneok Rockies Midstream Llc - Grasslands Gas Plant | Alexander | 12.2M | Compliant |
| Watford City Plant | Alexander | 15.4k | Compliant |
| Little Missouri Gas Plant | Watford City | 14.4k | Compliant |
| Red Wing Creek Gas Plant Ii | Arnegard | 8.1k | Compliant |
| Wild Basin Gas Processing And Crude Handling Facility | Watford City | 7.9k | Compliant |
| Garden Creek Gas Plant | Watford City | 5.5k | Compliant |
| Demicks Lake Gas Plant | Watford City | 4.0k | Compliant |
| Lonesome Creek Gas Plant | Alexander | 3.2k | Compliant |
| Bear Den Gas Plant | Watford City | 2.2k | Compliant |
| Roosevelt Gas Plant | Watford City | 1.2k | Compliant |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Biobridge Wastewater | Watford City | $125.0k | 2026-01-15 |
| Bullrock, Llc- Alfred Brown Swd | Keene | $0 | |
| Aries Residence Suites | Watford City | $0 | 2026-01-15 |
| Badlands Aggregate Inc. - Jacobson Scoria Pit | Watford City | $0 | |
| Ihd Solids Management | Williston | $0 | 2024-06-26 |
| Hess Corporation - Stony Creek | Unknown | $0 | |
| Rolfsrud County Road 10 Scoria Pit | Watford City | $0 | |
| Bullrock Llc, Hob #1 | Keene | $0 | |
| Wolla Oilfield Services - Watford City | Watford City | $0 | 2025-08-05 |