NPDES permits in North Dakota
197 permits held by publicly owned wastewater treatment plants · issued by NDDEQ
Effective
196
Administratively continued
1
Expired
0
Total tracked
197
North Dakota Department of Environmental Quality (NDDEQ) runs the NPDES program in North Dakota under delegation from EPA Region 8, issuing and enforcing the discharge permits listed here. Klarifi tracks 197 permits held by publicly owned treatment plants in the state, with status, expiry, design flow and three-year compliance for each. Agency website →
An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.
Permit renewals by year
Largest permit holders in North Dakota
| Facility | City | Avg flow (MGD) | Design (MGD) | NPDES permit | Status | Expires | Violations (3y) |
|---|---|---|---|---|---|---|---|
| Grand Forks City Of | Grand Forks | 8.82 | 40.71 | ND0022888 | Effective | Dec 2028 | 7 |
| Bismarck City Of (potw) | Bismarck | 7.66 | 10.68 | ND0023434 | Effective | Jun 2028 | 0 |
| Finley City Of | Finley | — | 6.53 | NDG322004 | Effective | Sep 2029 | 11 |
| Williston City Of | Williston | 2.88 | 6 | ND0022349 | Effective | Mar 2028 | 4 |
| Devils Lake City Of | Devils Lake | — | 5.5 | ND0020681 | Effective | Mar 2028 | 77 |
| City Of Minot - Minot Landfill | Minot | 4.26 | — | ND0022896 | Effective | Mar 2030 | 19 |
| Strasburg City Of-Treatment Plant | Strasburg | — | 2.62 | NDG322951 | Effective | Sep 2029 | 3 |
| Mandan Landfill / Ts | Mandan | 1.77 | — | ND0022861 | Effective | Sep 2026 | 0 |
| New Town Water Resource Recovery Facility | New Town | — | 0.92 | NDG589108 | Effective | Mar 2027 | 1 |
| Ray City Of | Ray | — | 0.28 | NDG320869 | Effective | Sep 2029 | 0 |
| Fort Totten-West Acres WWTF | Fort Totten | — | 0.15 | NDG589201 | Effective | Mar 2027 | — |
| Green Acres Lagoon System WWTF | Belcourt | — | 0.13 | NDG589403 | Effective | Mar 2027 | 132 |
| Lidgerwood City Of | Lidgerwood | — | 0.12 | NDG321539 | Effective | Sep 2029 | 2 |
| Sky Dancer Lagoon System | Belcourt | — | 0.11 | NDG589404 | Effective | Mar 2027 | — |
| White Shield Wastewater Treatment Lagoon | New Town | — | 0.1 | NDG589101 | Effective | Mar 2027 | — |
| St Michaels Wastewater Treatment Lagoon | Fort Totten | — | 0.09 | NDG589202 | Effective | Mar 2027 | — |
| Lake Metigoshe Recreation | Bottineau | — | 0.09 | NDG325330 | Effective | Sep 2029 | 0 |
| Lansford City Of | Lansford | — | 0.08 | NDG320516 | Effective | Sep 2029 | 1 |
| Prairie Knights Casino & Resort | Fort Yates | — | 0.06 | ND0031135 | Administratively continued | Dec 2023 | 9 |
| Bullhead Lagoon | Fort Yates | — | 0.06 | NDG589308 | Effective | Mar 2027 | — |
| Kenel Lagoon | Fort Yates | — | 0.05 | NDG589311 | Effective | Mar 2027 | — |
| Little Eagle Community Lagoon | Fort Yates | — | 0.05 | NDG589310 | Effective | Mar 2027 | — |
| Spirit Lake Casino WWTF | Saint Michael | — | 0.05 | NDG589204 | Effective | Mar 2027 | 19 |
| East Dunseith Wastewater Treatment Lagoons | Belcourt | — | 0.03 | NDG589402 | Effective | Mar 2027 | 80 |
| Twin Buttes Wastewater Treatment Lagoons | New Town | — | 0.02 | NDG589103 | Effective | Mar 2027 | 38 |
All 197 plants in North Dakota →
NPDES permits in North Dakota: questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026.