Clean Water Act discharge permit · NPDES WI0036021
FONTANA WALWORTH WATER POLLUTION CONT. COMM, Walworth, WI: NPDES WI0036021 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 12Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
FONTANA WALWORTH WATER POLLUTION CONT. COMM, held by Fontana Walworth Water Pollution Cont. Comm, holds NPDES permit WI0036021, which discharges to Piscasaw Cr. EPA’s file records it issued April 23, 2013 and expiring March 31, 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 | FONTANA WALWORTH WATER POLLUTION CONT. COMM |
|---|---|
| Permittee as filed | Fontana Walworth Water Pollution Cont. Comm |
| NPDES ID | WI0036021 |
| 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 | April 23, 2013 |
| Expiration date | March 31, 2018 |
| Address | Walworth, WI 53184 |
| Receiving water | PISCASAW CR |
| Subwatershed | Headwaters Piscasaw Creek (HUC 070900060303) |
| Program components on file | Biosolids, POTW |
| 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
- 15Pollutants on file
- 12Under a numeric limit
- 10With 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 |
|---|---|---|---|---|---|
| Chloride [as Cl] | 3 | 34 | 33 | June 30, 2026 | 900% over the limit |
| Solids, total suspended | 5 | 12 | 12 | April 30, 2025 | 917% over the limit |
| Nitrogen, ammonia total [as N] | 32 | 5 | 5 | January 31, 2015 | 57% over the limit |
| Phosphorus, total [as P] | 4 | 3 | 3 | January 31, 2011 | 24% over the limit |
| BOD, 5-day, 20 deg. C | 14 | 1 | 1 | January 31, 2025 | 27% over the limit |
| Mercury, total recoverable | 2 | 169 | 0 | ||
| Nitrogen, total [as N] | 0 | 85 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 85 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 85 | 0 | ||
| Coliform, fecal general | 1 | 42 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 4 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 24, 2025 | WW SSO - Discharge to Waters | ST6 |
| March 17, 2025 | 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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.