Clean Water Act discharge permit · NPDES MI0023833
PORT HURON WWTP, Port Huron, MI: NPDES MI0023833 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 25Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
PORT HURON WWTP, held by City of Port Huron, holds NPDES permit MI0023833, which discharges to St. Clair River. EPA’s file records it issued September 16, 2016 and expiring October 1, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PORT HURON WWTP |
|---|---|
| Permittee as filed | City of Port Huron |
| NPDES ID | MI0023833 |
| 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 | September 16, 2016 |
| Expiration date | October 1, 2021 |
| Issuing agency | State |
| Address | Port Huron, MI 48060 |
| Receiving water | St. Clair River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Milwaukee Creek-Frontal Lake Huron (HUC 040801040207) |
| Other EPA IDs (FRS) | RCRA handler MID985573484 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 27Pollutants on file
- 25Under a numeric limit
- 13With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 61 | 9 | August 31, 2021 | 84% over the limit |
| Mercury, total [as Hg] | 6 | 38 | 7 | October 31, 2013 | 63% over the limit |
| Phosphorus, total [as P] | 4 | 34 | 6 | July 31, 2022 | 10% over the limit |
| Oxygen, dissolved [DO] | 1 | 19 | 5 | September 30, 2018 | 25% over the limit |
| Solids, suspended percent removal | 2 | 15 | 1 | April 30, 2020 | 14% over the limit |
| Chlorine, total residual | 1 | 15 | 1 | October 31, 2015 | 17% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 56 | 0 | ||
| pH | 2 | 28 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 28 | 0 | ||
| Coliform, fecal general | 2 | 28 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 0 | 20 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 14 | 0 | ||
| Perfluorooctanesulfonate | 0 | 4 | 0 | ||
| Solids, total | 3 | 0 | 0 | ||
| Arsenic, dry weight | 3 | 0 | 0 | ||
| Selenium, dry weight | 3 | 0 | 0 | ||
| Copper, dry weight | 3 | 0 | 0 | ||
| Cadmium, dry weight | 3 | 0 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 0 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 0 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 0 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 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
- 21Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 21, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| June 22, 2023 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| June 22, 2023 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| May 25, 2023 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| May 25, 2023 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| September 22, 2021 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| September 22, 2021 | Reporting Violations - Failure to Notify | ST6 |
| July 1, 2020 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| July 1, 2020 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| March 8, 2019 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| February 21, 2019 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 31, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| July 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| June 26, 2018 | Effluent Violations - Narrative Effluent Violation | ST6 |
| June 4, 2018 | Pretreatment - Failure to Establish Local Limits | ST6 |
| June 4, 2018 | Failure to issue/reissue control mechanisms to at least 90% of SIU/CIUs w/in 6 months (Level II) | ST6 |
| May 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| February 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| February 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| January 21, 2017 | Reporting Violations - Late Submittal of DMRs | 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.
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, MI0023833.
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 MI0023833 there.
Nearby on the register
- Discharge permits in Port Huron
- Every permit record in Port Huron, A to Z
- Discharge permits in Michigan
- Every permit record in Michigan, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.