Clean Water Act discharge permit · NPDES WI0023981
FENNIMORE WASTEWATER TREATMENT FACILITY, Fennimore, WI: NPDES WI0023981 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 7Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
FENNIMORE WASTEWATER TREATMENT FACILITY, held by CITY OF FENNIMORE, holds NPDES permit WI0023981, which discharges to Grant R Via Greg. EPA’s file records it issued August 26, 2013 and expiring September 30, 2018. 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 | FENNIMORE WASTEWATER TREATMENT FACILITY |
|---|---|
| Permittee as filed | CITY OF FENNIMORE |
| NPDES ID | WI0023981 |
| 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 | August 26, 2013 |
| Expiration date | September 30, 2018 |
| Address | Fennimore, WI 53809 |
| Receiving water | GRANT R VIA GREG |
| Subwatershed | Headwaters Grant River (HUC 070600030104) |
| 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
- 10Pollutants on file
- 7Under a numeric limit
- 9With 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 | 4 | 39 | 15 | June 30, 2026 | 113% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 34 | 10 | April 30, 2026 | 99,999% over the limit |
| Phosphorus, total [as P] | 1 | 21 | 9 | March 31, 2025 | 239% over the limit |
| Oxygen, dissolved [DO] | 1 | 9 | 3 | October 31, 2025 | 5% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 2 | 2 | April 30, 2023 | 77% over the limit |
| pH | 2 | 13 | 1 | June 30, 2025 | |
| Zinc, total recoverable | 0 | 143 | 0 | ||
| Chloride [as Cl] | 3 | 42 | 0 | ||
| Coliform, fecal general | 0 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 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
- 9Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 21, 2024 | WW SSO - Discharge to Waters | ST6 |
| July 2, 2024 | WW SSO - Discharge to Waters | ST6 |
| January 20, 2024 | WW SSO - Discharge to Waters | ST6 |
| January 15, 2024 | WW SSO - Discharge to Waters | ST6 |
| January 2, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| February 15, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| January 24, 2023 | Effluent Violations - Failed Toxicity Test | ST6 |
| January 5, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| June 9, 2018 | WW SSO - Discharge to Waters | 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 WI0023981 there.
Nearby on the register
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- Every permit record in Fennimore, A to Z
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- Every permit record in Wisconsin, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.