Clean Water Act discharge permit · NPDES MN0025259
WILLMAR WWTP, Willmar, MN: NPDES MN0025259 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 26Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
WILLMAR WWTP, held by Willmar WWTF, holds NPDES permit MN0025259, which discharges to Hawk Cr Via Co Dt 46 & Co Dt 19. EPA’s file records it issued June 1, 2015 and expiring May 31, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WILLMAR WWTP |
|---|---|
| Permittee as filed | Willmar WWTF |
| NPDES ID | MN0025259 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 1, 2015 |
| Expiration date | May 31, 2020 |
| Address | Willmar, MN 56201 |
| Receiving water | HAWK CR VIA CO DT 46 & CO DT 19 |
| Subwatershed | Town of Priam-Hawk Creek (HUC 070200040702) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 26Pollutants on file
- 26Under a numeric limit
- 7With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 11 | 3 | 3 | August 31, 2016 | 56% over the limit |
| Oxygen, dissolved [DO] | 4 | 3 | 2 | August 31, 2010 | 47% over the limit |
| Solids, suspended percent removal | 1 | 2 | 2 | December 31, 2012 | 560% over the limit |
| Phosphorus, total [as P] | 9 | 1 | 1 | August 31, 2016 | 24% over the limit |
| Chloride [as Cl] | 2 | 1 | 1 | January 31, 2016 | 7% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 1 | 1 | December 31, 2012 | 560% over the limit |
| Flow, in conduit or thru treatment plant | 18 | 1 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 10 | 0 | 0 | ||
| pH | 6 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 0 | 0 | ||
| Nitrogen, total [as N] | 3 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 3 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 3 | 0 | 0 | ||
| Bicarbonate ion- [as HCO3] | 2 | 0 | 0 | ||
| Silver, total [as Ag] | 2 | 0 | 0 | ||
| Hardness, Ca Mg Calculated [mg/L as CaCO3] | 2 | 0 | 0 | ||
| Solids, total dissolved | 2 | 0 | 0 | ||
| Specific conductance | 1 | 0 | 0 | ||
| Precipitation, total defined period/in | 1 | 0 | 0 | ||
| Calcium, total [as Ca] | 1 | 0 | 0 | ||
| Magnesium, total [as Mg] | 1 | 0 | 0 | ||
| Sodium, total [as Na] | 1 | 0 | 0 | ||
| Potassium, total [as K] | 1 | 0 | 0 | ||
| Coliform, fecal MPN + membrane ftl 44.5 C | 1 | 0 | 0 | ||
| Mercury, dissolved [as Hg] | 1 | 0 | 0 | ||
| Mercury, total [as Hg] | 1 | 0 | 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 MN0025259.
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
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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 MN0025259 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.