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Clean Water Act discharge permit · NPDES WI0021938

WINNECONNE WASTEWATER TREATMEN, Winneconne, WI: NPDES WI0021938 discharge permit, effluent exceedances, inspections, penalties

WINNECONNE WASTEWATER TREATMEN holds NPDES permit WI0021938, which discharges to Wolf R. EPA’s file records it issued September 20, 2010 and expiring September 30, 2015. 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 filedWINNECONNE WASTEWATER TREATMEN
Permittee as filedWINNECONNE WASTEWATER TREATMEN
NPDES IDWI0021938
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedSeptember 20, 2010
Expiration dateSeptember 30, 2015
AddressWinneconne, WI 54986
Receiving waterWOLF R
SubwatershedLake Poygan (HUC 040302022106)
SIC4952 – Sewerage Systems
Other EPA IDs (FRS)RCRA handler WID980795207

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Chlorine, total residual011August 31, 19898% over the limit
BOD, 5-day, 20 deg. C0560
Solids, total suspended0560
Flow, in conduit or thru treatment plant0560
pH0280
Nitrogen, ammonia total [as N]0280
Phosphorus, total [as P]0280

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

DateWhat EPA recordedAgency
May 20, 2025WW SSO - Discharge to WatersST6
July 15, 2021WW SSO - Discharge to WatersST6
March 30, 2020WW SSO - Discharge to WatersST6
June 12, 2019WW SSO - Discharge to WatersST6
April 11, 2018WW SSO - Discharge to WatersST6
February 15, 2018WW SSO - Discharge to WatersST6

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 WI0021938 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers NPDES permit WI0021938, held by WINNECONNE WASTEWATER TREATMEN in Winneconne, WI, which discharges to Wolf R in the Lake Poygan subwatershed (HUC 040302022106). The permit is listed as administratively continued, with a Minor discharger class, 0 pollutants under a numeric limit, and 1 pollutant with an effluent exceedance.