Clean Water Act discharge permit · NPDES MNG585128
PORTER WWTP, Porter, MN: NPDES MNG585128 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
PORTER WWTP, held by Porter city of, holds NPDES permit MNG585128. EPA’s file records it issued November 1, 2022 and expiring November 30, 2023. 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 | PORTER WWTP |
|---|---|
| Permittee as filed | Porter city of |
| NPDES ID | MNG585128 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 1, 2022 |
| Expiration date | November 30, 2023 |
| Issuing agency | STA |
| Address | Porter, MN 56280 |
| Subwatershed | Mud Creek (HUC 070200040306) |
| 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
- 11Under a numeric limit
- 6With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 4 | 2 | 2 | June 30, 2024 | 394% over the limit |
| Coliform, fecal MPN + membrane ftl 44.5 C | 1 | 1 | 1 | July 31, 2025 | 778% over the limit |
| Nitrogen, total [as N] | 2 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 2 | 0 | ||
| pH | 3 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 9 | 0 | 0 | ||
| Solids, total suspended | 5 | 0 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 5 | 0 | 0 | ||
| Precipitation, total defined period/in | 1 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 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 MNG585128.
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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- 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 MNG585128 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.