Clean Water Act discharge permit · NPDES WI0021016
DARLINGTON WASTEWATER TREATMENT FACILITY, Darlington, WI: NPDES WI0021016 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
DARLINGTON WASTEWATER TREATMENT FACILITY, held by DARLINGTON WASTEWATER TREATMEN, holds NPDES permit WI0021016, which discharges to Pecatonica R W B. EPA’s file records it issued December 11, 2006 and expiring December 31, 2011. 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 | DARLINGTON WASTEWATER TREATMENT FACILITY |
|---|---|
| Permittee as filed | DARLINGTON WASTEWATER TREATMEN |
| NPDES ID | WI0021016 |
| 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 | December 11, 2006 |
| Expiration date | December 31, 2011 |
| Address | Darlington, WI 53530 |
| Receiving water | PECATONICA R W B |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Vinegar Branch-Pecatonica River (HUC 070900030306) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 7Pollutants on file
- 0Under a numeric limit
- 7With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 0 | 19 | 1 | March 31, 2022 | 60% over the limit |
| BOD, 5-day, 20 deg. C | 0 | 72 | 0 | ||
| Solids, total suspended | 0 | 72 | 0 | ||
| Flow, in conduit or thru treatment plant | 0 | 72 | 0 | ||
| pH | 0 | 36 | 0 | ||
| Phosphorus, total [as P] | 0 | 18 | 0 | ||
| Chloride [as Cl] | 0 | 6 | 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
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 2, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| October 2, 2019 | WW SSO - Discharge to Waters | ST6 |
| March 14, 2019 | WW SSO - Discharge to Waters | ST6 |
| October 2, 2018 | WW SSO - Discharge to Waters | ST6 |
| July 20, 2017 | 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.
Watch this permit
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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 WI0021016 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.