Clean Water Act discharge permit · NPDES MN0030147
WINONA WWTP, Winona, MN: NPDES MN0030147 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 18Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
WINONA WWTP, held by Winona WWTP, holds NPDES permit MN0030147, which discharges to Miss R. EPA’s file records it issued March 4, 2010 and expiring February 28, 2015. 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 | WINONA WWTP |
|---|---|
| Permittee as filed | Winona WWTP |
| NPDES ID | MN0030147 |
| 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 | March 4, 2010 |
| Expiration date | February 28, 2015 |
| Address | Winona, MN 55987 |
| Receiving water | MISS R |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Pleasant Valley Creek (HUC 070400030607) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 24Pollutants on file
- 18Under a numeric limit
- 12With a violation of any kind
- 5With 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 | 6 | 9 | 9 | June 30, 2024 | 138% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 6 | 5 | 5 | May 31, 2020 | 65% over the limit |
| Chlorine, total residual | 1 | 4 | 4 | May 31, 2020 | 163% over the limit |
| Solids, suspended percent removal | 1 | 4 | 4 | May 31, 2024 | 39% over the limit |
| pH | 4 | 2 | 2 | December 31, 2023 | |
| Sodium, total [as Na] | 0 | 2 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 1 | 0 | ||
| Bicarbonate ion- [as HCO3] | 0 | 1 | 0 | ||
| Calcium, total [as Ca] | 0 | 1 | 0 | ||
| Magnesium, total [as Mg] | 0 | 1 | 0 | ||
| Potassium, total [as K] | 0 | 1 | 0 | ||
| Hardness, Ca Mg Calculated [mg/L as CaCO3] | 0 | 1 | 0 | ||
| Phosphorus, total [as P] | 3 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 0 | 0 | ||
| Mercury, total [as Hg] | 2 | 0 | 0 | ||
| Precipitation, total defined period/in | 1 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 | ||
| Copper, total [as Cu] | 1 | 0 | 0 | ||
| Zinc, total [as Zn] | 1 | 0 | 0 | ||
| Coliform, fecal MPN + membrane ftl 44.5 C | 1 | 0 | 0 | ||
| Solids, total dissolved | 1 | 0 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 14, 2017 | Biosolids - Land Application: Facility Failed to Keep Records for Preparers and Appliers | ST6 |
| March 14, 2017 | Biosolids - Land Application: Failure to Notify State Permitting Authority | ST6 |
| March 14, 2017 | Biosolids - Land Application: Applied to Land at Greater than the Agronomic Rate Violation | 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.
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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 MN0030147 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.