Clean Water Act discharge permit · NPDES WI0025593
SUPERIOR SEWAGE DISPOSAL SYSTEM, Superior, WI: NPDES WI0025593 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 20Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
SUPERIOR SEWAGE DISPOSAL SYSTEM holds NPDES permit WI0025593, which discharges to Superior Bay-St. EPA’s file records it issued February 5, 2013 and expiring March 31, 2018. 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 | SUPERIOR SEWAGE DISPOSAL SYSTEM |
|---|---|
| Permittee as filed | SUPERIOR SEWAGE DISPOSAL SYSTEM |
| NPDES ID | WI0025593 |
| 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 | February 5, 2013 |
| Expiration date | March 31, 2018 |
| Address | Superior, WI 54880 |
| Receiving water | SUPERIOR BAY-ST |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Saint Louis River (HUC 040102011604) |
| Program components on file | Biosolids, CSO, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler WID000495028 |
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
- 21Pollutants on file
- 20Under a numeric limit
- 10With a violation of any kind
- 8With 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 | 139 | 38 | July 31, 2024 | 479% over the limit |
| BOD, 5-day, 20 deg. C | 15 | 235 | 34 | August 31, 2024 | 68% over the limit |
| Chlorine, total residual | 4 | 104 | 26 | August 31, 2017 | 2,503% over the limit |
| Phosphorus, total [as P] | 10 | 117 | 17 | August 31, 2024 | 742% over the limit |
| pH | 8 | 157 | 9 | August 31, 2024 | |
| Coliform, fecal general | 6 | 162 | 8 | October 31, 2018 | 1,068% over the limit |
| Mercury, total recoverable | 4 | 5 | 3 | June 30, 2014 | 754% over the limit |
| BOD, carbonaceous [5 day, 5 C] | 5 | 1 | 1 | August 31, 2014 | 26% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 52 | 0 | ||
| Arsenic, total recoverable | 0 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 8 | 0 | 0 | ||
| E. coli | 8 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 0 | 0 | ||
| Cyanide, total [as CN] | 2 | 0 | 0 | ||
| Nickel, total recoverable | 2 | 0 | 0 | ||
| Zinc, total recoverable | 2 | 0 | 0 | ||
| Cadmium, total recoverable | 2 | 0 | 0 | ||
| Lead, total recoverable | 2 | 0 | 0 | ||
| Chromium, total recoverable | 2 | 0 | 0 | ||
| Copper, total recoverable | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 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
- 15Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 4, 2025 | WW SSO - Discharge to Waters | ST6 |
| August 21, 2024 | WW SSO - Discharge to Waters | ST6 |
| May 22, 2024 | WW SSO - Discharge to Waters | ST6 |
| September 24, 2023 | WW SSO - Discharge to Waters | ST6 |
| July 25, 2023 | WW SSO - Discharge to Waters | ST6 |
| April 12, 2023 | WW SSO - Discharge to Waters | ST6 |
| October 27, 2020 | WW SSO - Discharge to Waters | ST6 |
| April 29, 2020 | WW SSO - Discharge to Waters | ST6 |
| October 10, 2019 | WW SSO - Discharge to Waters | ST6 |
| April 2, 2019 | WW SSO - Discharge to Waters | ST6 |
| December 31, 2018 | WW SSO - Discharge to Waters | ST6 |
| October 10, 2018 | WW SSO - Discharge to Waters | ST6 |
| June 18, 2018 | WW SSO - Discharge to Waters | ST6 |
| October 3, 2017 | WW SSO - Discharge to Waters | ST6 |
| August 26, 2017 | 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 WI0025593 there.
Nearby on the register
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- Every permit record in Superior, A to Z
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- Every permit record in Wisconsin, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.