Clean Water Act discharge permit · NPDES WI0035581

RIB MOUNTAIN METRO SEWAGE DISTRICT WWTF, Schofield, WI: NPDES WI0035581 discharge permit, effluent exceedances, inspections, penalties

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

RIB MOUNTAIN METRO SEWAGE DISTRICT WWTF, held by Rib Mountain Metro Sewage District WWTF, holds NPDES permit WI0035581, which discharges to Wisconsin R. EPA’s file records it issued December 13, 2010 and expiring December 31, 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 filed	RIB MOUNTAIN METRO SEWAGE DISTRICT WWTF
Permittee as filed	Rib Mountain Metro Sewage District WWTF
NPDES ID	WI0035581
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	December 13, 2010
Expiration date	December 31, 2015
Address	Schofield, WI 54401
Receiving water	WISCONSIN R
Receiving water impaired	303(D) Listed
Subwatershed	Mosinee Flowage-Wisconsin River (HUC 070700021803)
Program components on file	Biosolids, POTW
SIC	4952 – Sewerage Systems
Other EPA IDs (FRS)	RCRA handler WIR000037895

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

12Pollutants on file
8Under a numeric limit
11With 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
Chlorine, total residual	0	11	11	September 30, 2002	47% over the limit
pH	2	4	4	September 30, 2025
Phosphorus, total [as P]	2	4	4	February 28, 2023	1,450% over the limit
BOD, 5-day, 20 deg. C	10	13	1	January 31, 2024	9% over the limit
Solids, total suspended	5	13	1	February 28, 2011	3% over the limit
Mercury, total recoverable	2	11	1	October 31, 2022	71% over the limit
Coliform, fecal general	1	42	0
Flow, in conduit or thru treatment plant	4	12	0
Nitrogen, total [as N]	0	6	0
Nitrogen, Kjeldahl, total [as N]	0	6	0
Nitrite + Nitrate total [as N]	0	6	0
Nitrogen, ammonia total [as N]	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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES WI0035581.

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 WI0035581 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 WI0035581 for the RIB MOUNTAIN METRO SEWAGE DISTRICT WWTF in Schofield, WI, which discharges to WISCONSIN R, with the permit shown as administratively continued and classed as a Major Discharger. The page lists 8 pollutants under a numeric limit and 6 pollutants with an effluent exceedance, with the permit's issue and expiration dates recorded as December 13, 2010 and December 31, 2015.