Clean Water Act discharge permit · NPDES MN0025267
WINNEBAGO WWTP, Winnebago, MN: NPDES MN0025267 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 26Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
WINNEBAGO WWTP, held by Winnebago WWTP, holds NPDES permit MN0025267, which discharges to Blue Earth R. EPA’s file records it issued November 1, 2012 and expiring October 31, 2017. 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 | WINNEBAGO WWTP |
|---|---|
| Permittee as filed | Winnebago WWTP |
| NPDES ID | MN0025267 |
| 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 | November 1, 2012 |
| Expiration date | October 31, 2017 |
| Issuing agency | MPCA |
| Address | Winnebago, MN 56098 |
| Receiving water | BLUE EARTH R |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | County Ditch No 24-Blue Earth River (HUC 070200091101) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 27Pollutants on file
- 26Under a numeric limit
- 18With 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, suspended percent removal | 1 | 9 | 9 | June 30, 2024 | 87% over the limit |
| Chlorine, total residual | 1 | 14 | 8 | April 30, 1993 | 2,900% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 6 | 17 | 5 | February 28, 2010 | 2,292% over the limit |
| Solids, total suspended | 7 | 16 | 4 | September 30, 2010 | 79% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 3 | 3 | October 31, 2012 | 93% over the limit |
| Chloride [as Cl] | 2 | 1 | 1 | July 31, 2015 | 28% over the limit |
| Flow, in conduit or thru treatment plant | 6 | 61 | 0 | ||
| pH | 4 | 12 | 0 | ||
| Coliform, fecal MPN + membrane ftl 44.5 C | 1 | 4 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 3 | 0 | ||
| Hardness, Ca Mg Calculated [mg/L as CaCO3] | 1 | 3 | 0 | ||
| Specific conductance | 1 | 2 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 2 | 0 | ||
| Nitrogen, total [as N] | 0 | 2 | 0 | ||
| Sodium, total [as Na] | 1 | 1 | 0 | ||
| Potassium, total [as K] | 1 | 1 | 0 | ||
| Phosphorus, total [as P] | 4 | 0 | 0 | ||
| Precipitation, total defined period/in | 1 | 0 | 0 | ||
| Bicarbonate ion- [as HCO3] | 1 | 0 | 0 | ||
| Calcium, total [as Ca] | 1 | 0 | 0 | ||
| Magnesium, total [as Mg] | 1 | 0 | 0 | ||
| Sulfate, total [as SO4] | 1 | 0 | 0 | ||
| Solids, total dissolved | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 7, 2019 | Effluent Violations - Unapproved Bypass | ST6 |
| May 4, 2017 | Permit Violations - Failure to Submit Timely Permit Renewal Application | ST6 |
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 MN0025267 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.