Clean Water Act discharge permit · NPDES WI0022870

OCONTO FALLS WASTEWATER TREATMENT FACILITY, Oconto Falls, WI: NPDES WI0022870 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
8Pollutants under a numeric limit
5Pollutants with an effluent exceedance

OCONTO FALLS WASTEWATER TREATMENT FACILITY, held by City of Oconto Falls, holds NPDES permit WI0022870, which discharges to Oconto R. EPA’s file records it issued March 22, 2012 and expiring March 31, 2017. 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	OCONTO FALLS WASTEWATER TREATMENT FACILITY
Permittee as filed	City of Oconto Falls
NPDES ID	WI0022870
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 22, 2012
Expiration date	March 31, 2017
Address	Oconto Falls, WI 54154
Receiving water	OCONTO R
Subwatershed	Machicknee Flowage-Oconto River (HUC 040301040505)
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
8Under a numeric limit
9With 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
Phosphorus, total percent removal	0	12	7	October 31, 1993	561% over the limit
Chlorine, total residual	1	6	6	August 31, 1993	174% over the limit
BOD, 5-day, 20 deg. C	4	70	2	October 31, 1993	47% over the limit
Solids, total suspended	4	69	1	March 31, 2021	99,999% over the limit
pH	2	35	1	February 28, 2018
Nitrogen, ammonia total [as N]	1	40	0
Flow, in conduit or thru treatment plant	2	24	0
Phosphorus, total [as P]	1	17	0
Coliform, fecal general	0	4	0
BOD, carbonaceous [5 day, 5 C]	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

4Single-event violations

Date	What EPA recorded	Agency
September 4, 2022	WW SSO - Discharge to Waters	ST6
March 21, 2021	WW SSO - Discharge to Waters	ST6
July 24, 2018	WW SSO - Discharge to Waters	ST6
June 25, 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 WI0022870 there.

Nearby on the register

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

This public-records page covers the NPDES WI0022870 Clean Water Act discharge permit held by City of Oconto Falls for the OCONTO FALLS WASTEWATER TREATMENT FACILITY in Oconto Falls, WI, which discharges to the Oconto R within the Machicknee Flowage-Oconto River subwatershed (HUC 040301040505). The permit is listed as administratively continued, with a discharger class of 8 and 5 pollutants under a numeric limit, and 5 pollutants with an effluent exceedance.