Clean Water Act discharge permit · NPDES MI0021377
HUDSON WWTP, Hudson, MI: NPDES MI0021377 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 25Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
HUDSON WWTP, held by City of Hudson, holds NPDES permit MI0021377, which discharges to Bean Creek. EPA’s file records it issued May 1, 2017 and expiring October 1, 2021. 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 | HUDSON WWTP |
|---|---|
| Permittee as filed | City of Hudson |
| NPDES ID | MI0021377 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 1, 2017 |
| Expiration date | October 1, 2021 |
| Issuing agency | State |
| Address | Hudson, MI 49247 |
| Receiving water | Bean Creek |
| Subwatershed | Covell Drain-Bean Creek (HUC 041000060106) |
| Program components on file | Biosolids, POTW |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 25Pollutants on file
- 25Under a numeric limit
- 25With a violation of any kind
- 9With 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 |
|---|---|---|---|---|---|
| BOD, carbonaceous [5 day, 20 C] | 12 | 128 | 20 | September 30, 2021 | 3,310% over the limit |
| Phosphorus, total [as P] | 4 | 47 | 15 | June 30, 2020 | 470% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 70 | 12 | June 30, 2020 | 520% over the limit |
| Solids, total suspended | 8 | 56 | 12 | May 31, 2019 | 841% over the limit |
| Coliform, fecal general | 2 | 40 | 6 | May 31, 2019 | 586% over the limit |
| Oxygen, dissolved [DO] | 2 | 30 | 3 | May 31, 2018 | 54% over the limit |
| pH | 2 | 36 | 2 | December 31, 2018 | |
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 6 | 2 | February 28, 2018 | 104% over the limit |
| Solids, suspended percent removal | 2 | 7 | 1 | April 30, 2017 | 127% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 34 | 0 | ||
| Chlorine, total residual | 1 | 17 | 0 | ||
| Solids, total | 3 | 3 | 0 | ||
| Arsenic, dry weight | 3 | 3 | 0 | ||
| Selenium, dry weight | 3 | 3 | 0 | ||
| Copper, dry weight | 3 | 3 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 3 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 3 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 3 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 3 | 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
- 9Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 31, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| March 5, 2025 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| March 5, 2025 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| January 15, 2025 | Management Practice Violations - Failure to Maintain Records | ST6 |
| October 16, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| July 3, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| March 6, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| February 14, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| June 21, 2023 | Reporting Violations - Late Submittal of DMRs | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| October 8, 2026 | Audit | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| October 29, 2026 | Letter of Violation/ Warning Letter | State |
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MI0021377.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MI0021377 there.
Nearby on the register
- Discharge permits in Hudson
- Every permit record in Hudson, A to Z
- Discharge permits in Michigan
- Every permit record in Michigan, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.