Clean Water Act discharge permit · NPDES WI0020281

MOUNT HOREB WWTF, Mount Horeb, WI: NPDES WI0020281 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
7Pollutants under a numeric limit
3Pollutants with an effluent exceedance

MOUNT HOREB WWTF, held by MOUNT HOREB WASTEWATER TREATME, holds NPDES permit WI0020281, which discharges to Sugar R W Br. EPA’s file records it issued October 29, 2002 and expiring September 30, 2007. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	MOUNT HOREB WWTF
Permittee as filed	MOUNT HOREB WASTEWATER TREATME
NPDES ID	WI0020281
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	October 29, 2002
Expiration date	September 30, 2007
Address	Mount Horeb, WI 53572
Receiving water	SUGAR R W BR
Subwatershed	Primrose Branch-West Branch Sugar River (HUC 070900040102)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

9Pollutants on file
7Under a numeric limit
9With a violation of any kind
3With 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
Nitrogen, ammonia total [as N]	0	29	5	September 30, 2022	122% over the limit
Phosphorus, total [as P]	1	34	4	May 31, 2020	277% over the limit
Oxygen, dissolved [DO]	1	19	1	August 31, 2024	86% over the limit
BOD, 5-day, 20 deg. C	2	112	0
Solids, total suspended	2	112	0
Coliform, fecal general	0	50	0
Chloride [as Cl]	1	42	0
pH	2	36	0
Flow, in conduit or thru treatment plant	2	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

4Single-event violations

Date	What EPA recorded	Agency
July 31, 2025	WW SSO - Discharge to Waters	ST6
June 23, 2025	WW SSO - Discharge to Waters	ST6
January 21, 2019	WW SSO - Discharge to Waters	ST6
August 21, 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 WI0020281 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers the NPDES discharge permit WI0020281 for the Mount Horeb WWTF in Mount Horeb, WI, which discharges to the Sugar R W Br within the Primrose Branch-West Branch Sugar River watershed (HUC 070900040102). The page lists the permit as administratively continued, with a Minor discharger class, 7 pollutants under a numeric limit, and 3 pollutants with an effluent exceedance.