Clean Water Act discharge permit · NPDES WI0020605

BARABOO WASTEWATER TREATMENT FACILITY, Baraboo, WI: NPDES WI0020605 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
7Pollutants under a numeric limit
1Pollutants with an effluent exceedance

BARABOO WASTEWATER TREATMENT FACILITY, held by BARABOO WASTEWATER TREATMENT F, holds NPDES permit WI0020605, which discharges to Baraboo R Lower. EPA’s file records it issued December 13, 2006 and expiring December 31, 2011. 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	BARABOO WASTEWATER TREATMENT FACILITY
Permittee as filed	BARABOO WASTEWATER TREATMENT F
NPDES ID	WI0020605
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, 2006
Expiration date	December 31, 2011
Address	Baraboo, WI 53913
Receiving water	BARABOO R LOWER
Subwatershed	Boulder Creek-Baraboo River (HUC 070700040404)
Other EPA IDs (FRS)	RCRA handler WID084228527

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

8Pollutants on file
7Under a numeric limit
8With a violation of any kind
1With 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	1	1	September 30, 2005	50% over the limit
Mercury, total recoverable	4	158	0
BOD, 5-day, 20 deg. C	6	30	0
Solids, total suspended	6	30	0
Coliform, fecal general	2	28	0
pH	2	12	0
Flow, in conduit or thru treatment plant	2	12	0
Phosphorus, total [as P]	2	6	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

2Single-event violations

Date	What EPA recorded	Agency
August 9, 2025	WW SSO - Discharge to Waters	ST6
July 1, 2023	Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)	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 WI0020605 there.

Nearby on the register

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

This public-records page covers the Clean Water Act NPDES permit WI0020605 held by Baraboo Wastewater Treatment Facility in Baraboo, WI, which discharges to Baraboo R Lower, with a status of administratively continued and a discharger class of 7 and a Major Discharger classification. The permit was issued December 13, 2006 and expired December 31, 2011, and the page lists 1 pollutant under a numeric limit and 1 pollutant with an effluent exceedance, as of September 15, 2026.