Clean Water Act discharge permit · NPDES WI0002402

WISCONSIN POWER AND LIGHT ROCK (WPL) - ROCK RIVER GENERATING, Beloit, WI: NPDES WI0002402 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
2Pollutants under a numeric limit
4Pollutants with an effluent exceedance

WISCONSIN POWER AND LIGHT ROCK (WPL) - ROCK RIVER GENERATING, held by WISCONSIN POWER AND LIGHT (WPL) - ROCK RIVER GENERATING STAT, holds NPDES permit WI0002402, which discharges to Rock R. EPA’s file records it issued September 30, 2011 and expiring September 30, 2016. 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	WISCONSIN POWER AND LIGHT ROCK (WPL) - ROCK RIVER GENERATING
Permittee as filed	WISCONSIN POWER AND LIGHT (WPL) - ROCK RIVER GENERATING STAT
NPDES ID	WI0002402
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Not a publicly owned treatment works
Issued	September 30, 2011
Expiration date	September 30, 2016
Address	Beloit, WI 53511
Receiving water	ROCK R
Receiving water impaired	303(D) Listed
Subwatershed	City of Beloit-Lower Rock River (HUC 070900021502)
SIC	4911 – Electric Services
Other EPA IDs (FRS)	RCRA handler WID044666881

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

9Pollutants on file
2Under a numeric limit
9With 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	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Solids, total suspended	0	19	19	May 31, 1999	80% over the limit
pH	0	10	8	June 30, 2000
Chlorine, total residual [dsg. time]	0	1	1	August 31, 1990	50% over the limit
Oil & Grease	0	1	1	July 31, 1998	280% over the limit
Flow, in conduit or thru treatment plant	2	24	0
Temperature, water deg. fahrenheit	1	13	0
Chlorine, total residual	0	4	0
Water treatment additives	0	4	0
Thermal Discharge	0	2	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 WI0002402.

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 WI0002402 there.

Nearby on the register

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

This public-records page covers Clean Water Act NPDES discharge permit WI0002402 for Wisconsin Power and Light's Rock River Generating facility in Beloit, WI, which discharges to the Rock R. The facts list 2 as the discharger class, 4 pollutants under a numeric limit, and 4 pollutants with an effluent exceedance, and the permit is shown as administratively continued.