Clean Water Act discharge permit · NPDES WI0030881

WATERLOO WASTEWATER TREATMENT FACILITY, Waterloo, WI: NPDES WI0030881 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
0Pollutants under a numeric limit
4Pollutants with an effluent exceedance

WATERLOO WASTEWATER TREATMENT FACILITY, held by WATERLOO WASTEWATER TREATMENT, holds NPDES permit WI0030881, which discharges to Maunesha R. EPA’s file records it issued December 22, 2003 and expiring December 31, 2008. 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	WATERLOO WASTEWATER TREATMENT FACILITY
Permittee as filed	WATERLOO WASTEWATER TREATMENT
NPDES ID	WI0030881
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 22, 2003
Expiration date	December 31, 2008
Address	Waterloo, WI 53594
Receiving water	MAUNESHA R
Subwatershed	Maunesha River (HUC 070900010804)
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

8Pollutants on file
0Under a numeric limit
8With a violation of any kind
4With 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	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Chloride [as Cl]	76	22	September 30, 2024	72% over the limit
Chlorine, total residual	22	22	August 31, 1993	2,000% over the limit
pH	51	15	January 31, 1993
Oxygen, dissolved [DO]	19	1	August 31, 1991	2% over the limit
Phosphorus, total [as P]	54	0
BOD, 5-day, 20 deg. C	36	0
Solids, total suspended	36	0
Flow, in conduit or thru treatment plant	36	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
January 9, 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 WI0030881 there.

Nearby on the register

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

This public-records page covers the Clean Water Act discharge permit NPDES WI0030881 for the Waterloo Wastewater Treatment Facility in Waterloo, WI, which discharges to the Maunesha R and is administratively continued. The page lists 0 for discharger class, 4 pollutants under a numeric limit, and 4 pollutants with an effluent exceedance. The permit's issue and expiration dates are shown as December 22, 2003 and December 31, 2008, respectively, as of October 14, 2026.