Clean Water Act discharge permit · NPDES MN0021971
WILLOW RIVER WWTP, Willow River, MN: NPDES MN0021971 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
WILLOW RIVER WWTP, held by WILLOW RIVER, holds NPDES permit MN0021971, which discharges to Kettle R. EPA’s file records it issued August 10, 2017 and expiring July 31, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WILLOW RIVER WWTP |
|---|---|
| Permittee as filed | WILLOW RIVER |
| NPDES ID | MN0021971 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 10, 2017 |
| Expiration date | July 31, 2022 |
| Address | Willow River, MN 55795 |
| Receiving water | KETTLE R |
| Subwatershed | City of Willow River-Kettle River (HUC 070300030601) |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 11Pollutants on file
- 0Under a numeric limit
- 11With a violation of any kind
- 1With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Coliform, fecal MPN + membrane ftl 44.5 C | 0 | 4 | 1 | September 30, 2022 | 63% over the limit |
| Solids, total suspended | 0 | 18 | 0 | ||
| Flow, in conduit or thru treatment plant | 0 | 18 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 0 | 18 | 0 | ||
| pH | 0 | 8 | 0 | ||
| Phosphorus, total [as P] | 0 | 7 | 0 | ||
| Precipitation, total defined period/in | 0 | 5 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 4 | 0 | ||
| Nitrogen, total [as N] | 0 | 4 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 4 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MN0021971.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MN0021971.
Start the watch
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- One watershed — $2,990/year
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MN0021971 there.
Nearby on the register
- Discharge permits in Willow River
- Every permit record in Willow River, A to Z
- Discharge permits in Minnesota
- Every permit record in Minnesota, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.