Clean Water Act discharge permit · NPDES WI0031054
PLYMOUTH TOWN SANITARY DISTRICT #1 WWTF, Hanover, WI: NPDES WI0031054 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
PLYMOUTH TOWN SANITARY DISTRICT #1 WWTF, held by PLYMOUTH TOWN SANITARY DISTRIC, holds NPDES permit WI0031054, which discharges to Bass Cr. EPA’s file records it issued March 24, 2004 and expiring March 31, 2009. 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 | PLYMOUTH TOWN SANITARY DISTRICT #1 WWTF |
|---|---|
| Permittee as filed | PLYMOUTH TOWN SANITARY DISTRIC |
| NPDES ID | WI0031054 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | March 24, 2004 |
| Expiration date | March 31, 2009 |
| Address | Hanover, WI 53548 |
| Receiving water | BASS CR |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Bass Creek (HUC 070900021202) |
| 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
- 4Pollutants on file
- 0Under a numeric limit
- 4With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 0 | 93 | 3 | March 31, 2026 | 10% over the limit |
| pH | 0 | 43 | 3 | April 30, 2022 | |
| Flow, in conduit or thru treatment plant | 0 | 222 | 0 | ||
| Solids, total suspended | 0 | 44 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 16, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| June 10, 2019 | Permit Violations - Violation Specified in Comment | ST6 |
| July 20, 2017 | WW SSO - Discharge to Waters | ST6 |
| February 1, 2017 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | 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 WI0031054 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.