Clean Water Act discharge permit · NPDES WI0000914
WI ELECTRIC POWER CO OAK CREEK, Oak Creek, WI: NPDES WI0000914 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 11Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
WI ELECTRIC POWER CO OAK CREEK, held by WE ENERGIES OAK CREEK POWER PL, holds NPDES permit WI0000914, which discharges to L Michigan. EPA’s file records it issued March 30, 2005 and expiring March 29, 2010. 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 OAK CREEK |
|---|---|
| Permittee as filed | WE ENERGIES OAK CREEK POWER PL |
| NPDES ID | WI0000914 |
| 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 | March 30, 2005 |
| Expiration date | March 29, 2010 |
| Address | Oak Creek, WI 53154 |
| Receiving water | L MICHIGAN |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Wind Point-Frontal Lake Michigan (HUC 040400020101) |
| SIC | 4911 – Electric Services |
| Other EPA IDs (FRS) | RCRA handler WIR000116889 |
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
- 17Pollutants on file
- 11Under a numeric limit
- 15With 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 | 19 | 660 | 4 | September 30, 2025 | 83% over the limit |
| Heat [summer] [per hour] | 8 | 215 | 3 | May 31, 2019 | 26% over the limit |
| Chlorine, total residual [dsg. time] | 0 | 21 | 1 | August 31, 1997 | 317% over the limit |
| Flow, in conduit or thru treatment plant | 24 | 763 | 0 | ||
| Oil and grease, hexane extr method | 4 | 380 | 0 | ||
| pH | 10 | 348 | 0 | ||
| Phosphorus, total [as P] | 10 | 159 | 0 | ||
| Mercury, total recoverable | 10 | 101 | 0 | ||
| Arsenic, total recoverable | 0 | 99 | 0 | ||
| Temperature, water deg. fahrenheit | 9 | 50 | 0 | ||
| Rainfall | 2 | 50 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 44 | 0 | ||
| Selenium, total recoverable | 0 | 44 | 0 | ||
| Chlorine, total residual | 0 | 31 | 0 | ||
| Oil & Grease | 0 | 4 | 0 | ||
| Aluminum, total recoverable | 10 | 0 | 0 | ||
| Copper, total recoverable | 10 | 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
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 1, 2022 | Monitoring Violations - Analysis not Conducted | ST6 |
| February 28, 2022 | Monitoring Violations - Analysis not Conducted | ST6 |
| February 19, 2022 | Monitoring Violations - Analysis not Conducted | ST6 |
| July 8, 2021 | Monitoring Violations - Analysis not Conducted | ST6 |
| February 23, 2021 | Monitoring Violations - Analysis not Conducted | 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 WI0000914 there.
Nearby on the register
- Discharge permits in Oak Creek
- Every permit record in Oak Creek, A to Z
- Discharge permits in Wisconsin
- Every permit record in Wisconsin, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.