Clean Water Act discharge permit · NPDES WI0021946

TOMAHAWK CITY OF, Bradley, WI: NPDES WI0021946 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
8Pollutants under a numeric limit
6Pollutants with an effluent exceedance

TOMAHAWK CITY OF, held by CITY OF TOMAHAWK, holds NPDES permit WI0021946, which discharges to Wisconsin R. EPA’s file records it issued June 17, 2013 and expiring June 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	TOMAHAWK CITY OF
Permittee as filed	CITY OF TOMAHAWK
NPDES ID	WI0021946
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	June 17, 2013
Expiration date	June 30, 2018
Address	Bradley, WI 54487
Receiving water	WISCONSIN R
Receiving water impaired	303(D) Listed
Subwatershed	Lake Mohawksin-Wisconsin River (HUC 070700011306)
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

12Pollutants on file
8Under a numeric limit
12With 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	71	11	July 31, 2023	217% over the limit
Oxygen, dissolved [DO]	1	13	4	July 31, 2025	90% over the limit
Chlorine, total residual	0	4	4	August 31, 1995	140% over the limit
BOD, 5-day, 20 deg. C	4	62	2	November 30, 1995	20% over the limit
pH	2	22	2	December 31, 1994
Phosphorus, total [as P]	1	10	1	February 28, 2023	473% over the limit
Hardness, total [as CaCO3]	0	96	0
Copper, total recoverable	0	96	0
Coliform, fecal general	0	46	0
Flow, in conduit or thru treatment plant	2	18	0
Temperature, water deg. fahrenheit	1	2	0
Nitrogen, ammonia total [as N]	1	1	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

1Single-event violations

Date	What EPA recorded	Agency
July 8, 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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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 WI0021946 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES WI0021946, held by CITY OF TOMAHAWK for the TOMAHAWK CITY OF facility in Bradley, WI, which discharges to WISCONSIN R within the Lake Mohawksin-Wisconsin River subwatershed (HUC 070700011306). The page lists 8 for discharger class, 6 pollutants under a numeric limit, and 6 pollutants with an effluent exceedance, and it shows the permit as administratively continued.