Clean Water Act discharge permit · NPDES WI0000922

WI ELECTRIC POWER CO PORT WASH, Port Washington, WI: NPDES WI0000922 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
9Pollutants under a numeric limit
3Pollutants with an effluent exceedance

WI ELECTRIC POWER CO PORT WASH, held by WE - PORT WASHINGTON GENERATIN, holds NPDES permit WI0000922, which discharges to L Michigan. EPA’s file records it issued September 18, 2015 and expiring September 30, 2020. 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	WI ELECTRIC POWER CO PORT WASH
Permittee as filed	WE - PORT WASHINGTON GENERATIN
NPDES ID	WI0000922
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 18, 2015
Expiration date	September 30, 2020
Address	Port Washington, WI 53074
Receiving water	L MICHIGAN
Subwatershed	Sauk Creek (HUC 040301011204)
SIC	4911 – Electric Services
Other EPA IDs (FRS)	RCRA handler WID000710996; ICIS-AIR source WI0000005508900004

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

11Pollutants on file
9Under a numeric limit
10With 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
Solids, total suspended	10	149	4	August 31, 2003	127% over the limit
pH	2	13	3	March 31, 2014
Oil and grease, hexane extr method	24	108	2	February 28, 2005	60% over the limit
Flow, in conduit or thru treatment plant	18	150	0
Phosphorus, total [as P]	3	67	0
BOD, 5-day, 20 deg. C	8	12	0
Heat [summer] [per hour]	2	9	0
Mercury, total recoverable	0	6	0
Arsenic, total recoverable	2	4	0
Oil & Grease	0	3	0
Temperature, water deg. fahrenheit	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 WI0000922.

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 WI0000922 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 WI0000922, held by WI ELECTRIC POWER CO PORT WASH in Port Washington, WI, which discharges to L Michigan. The permit is classed as a Major Discharger, is administratively continued, and lists 9 pollutants under a numeric limit, 3 of which show an effluent exceedance.