Clean Water Act discharge permit · NPDES WI0024279
HUDSON CITY WWTF, Hudson, WI: NPDES WI0024279 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 10Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
HUDSON CITY WWTF, held by HUDSON WASTEWATER TREATMENT FA, holds NPDES permit WI0024279, which discharges to St Croix R. EPA’s file records it issued August 12, 2010 and expiring June 30, 2015. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | HUDSON CITY WWTF |
|---|---|
| Permittee as filed | HUDSON WASTEWATER TREATMENT FA |
| NPDES ID | WI0024279 |
| 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 | August 12, 2010 |
| Expiration date | June 30, 2015 |
| Address | Hudson, WI 54016 |
| Receiving water | ST CROIX R |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Trout Brook-Lake Saint Croix (HUC 070300051205) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 10Under a numeric limit
- 10With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 2 | 70 | 70 | June 30, 2024 | 15,539% over the limit |
| Chlorine, total residual | 2 | 89 | 8 | September 30, 2020 | 163% over the limit |
| Solids, total suspended | 5 | 2 | 2 | June 30, 2018 | 370% over the limit |
| BOD, carbonaceous [5 day, 5 C] | 3 | 2 | 2 | June 30, 2018 | 47% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 2 | 2 | April 30, 2025 | 12% over the limit |
| Coliform, fecal general | 1 | 54 | 1 | June 30, 2018 | 5% over the limit |
| Mercury, total recoverable | 2 | 46 | 0 | ||
| Nitrogen, total [as N] | 0 | 23 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 23 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 23 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 21, 2022 | WW SSO - Discharge to Waters | ST6 |
| April 16, 2018 | WW SSO - Discharge to Waters | ST6 |
| April 1, 2018 | WW SSO - Discharge to Waters | ST6 |
| August 21, 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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Nearby on the register
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- Every permit record in Hudson, A to Z
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- Every permit record in Wisconsin, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.