Clean Water Act discharge permit · NPDES MI0023825
OAKLAND CO-PONTIAC WWTP, Pontiac, MI: NPDES MI0023825 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 27Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
OAKLAND CO-PONTIAC WWTP, held by The Pontiac Wastewater Treatment Facility Drainage District, holds NPDES permit MI0023825, which discharges to Clinton River. EPA’s file records it issued August 1, 2016 and expiring October 1, 2020.
OAKLAND CO-PONTIAC WWTP, Pontiac, Michigan: Individual permit MI0023825, held by The Pontiac Wastewater Treatment Facility Drainage District; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued August 1, 2016, term to October 1, 2020, by State; discharges to Clinton River; Sewage Treatment Facilities.
- Nitrogen, ammonia total [as N]: 12 limits, 7 violations of any kind, 7 effluent exceedances, latest June 30, 2013, largest 348% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 12 limits, 7 violations of any kind, 7 effluent exceedances, latest April 30, 2026, largest 250% over the limit.
- Coliform, fecal general: 2 limits, 1 violation of any kind, 1 effluent exceedance, latest October 31, 2023, largest 47% over the limit.
- Solids, total suspended: 12 limits, 0 violations of any kind, 0 effluent exceedances.
- Mercury, total [as Hg]: 6 limits, 0 violations of any kind, 0 effluent exceedances.
- Phosphorus, total [as P]: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Solids, total: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Nitrogen, total Kjeldahl: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Nitrogen, sludge, total, dry weight [as N]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Potassium, sludge, total, dry weight [as K]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Phosphorus, sludge, total, dry weight [as P]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- pH: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Copper, total [as Cu]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Cyanide [A]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Solids, suspended percent removal: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- May 22, 2026: Notice of Violation (State).
- March 20, 2026: Letter of Violation/ Warning Letter (State).
- February 26, 2026: Monitoring Violations - Analysis not Conducted (ST6).
- February 26, 2026: Monitoring Violations - Improper Analysis or Lab Error (ST6).
- February 26, 2026: Evaluation (S).
- October 16, 2025: Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) (ST6).
- June 3, 2025: Monitoring Violations - Improper Analysis or Lab Error (ST6).
- August 18, 2021: Pretreatment - Failure to Develop/Enforce Standards (ST6).
- August 18, 2021: Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) (ST6).
- January 10, 2019: Effluent Violations - Narrative Effluent Violation (ST6).
Michigan holds 200 Publicly owned treatment works coverages of this permit type in EPA’s file; 42 were issued before MI0023825.
Coverages issued nearest MI0023825
- July 19, 2016: KALAMAZOO WWTP, Kalamazoo, MI0023299, held by City of Kalamazoo
- July 29, 2016: IONIA WWTP, Ionia, MI0021041, held by Ionia Regional Utilities Authority
- July 29, 2016: GRANDVILLE WWTP, Jenison, MI0023027, held by City of Grandville
- July 29, 2016: GROSSE ILE TWP WWTP, Grosse Ile Township, MI0026191, held by Grosse Ile Township
- August 1, 2016: WEST BRANCH WWTP, West Branch, MI0020095, held by City of West Branch
- August 3, 2016: CHARLOTTE WWTP, Charlotte, MI0020788, held by Britani Wisniewski
- September 16, 2016: HASTINGS WWTP, Hastings, MI0020575, held by City of Hastings
- September 16, 2016: PORT HURON WWTP, Port Huron, MI0023833, held by City of Port Huron
- September 26, 2016: MANISTIQUE WWTP, Manistique, MI0023515, held by City of Manistique
- September 27, 2016: EAST LANSING WRRF, East Lansing, MI0022853, held by City of East Lansing
OAKLAND CO-PONTIAC WWTP among its neighbors
EPA’s permit file holds 39 discharge permits in the Pontiac Creek-Clinton River subwatershed (HUC 040900030108), MI0023825 among them. Its county holds 124, 6 of them major permits; MI0023825 is a major permit.
Other permits in the Pontiac Creek-Clinton River subwatershed (HUC 040900030108)
- AKZO NOBEL COATINGS-PONTIAC, Pontiac: MIS120650, minor permit, discharging to Clinton River, permit term to March 31, 2026
- ALUMINUM BLANKING CO INC, Pontiac: MIS111717, minor permit, permit term to April 1, 2026
- AMAZON.COM SERVICES LLC - DET3, Pontiac: MIS112075, minor permit, permit term to April 1, 2026
- AMAZON.COM SERVICES LLC-DDT6, Pontiac: MIS112038, minor permit, discharging to Clinton River, permit term to April 1, 2026
- ANDROID INDUSTRIES-AUBURN HILL, Auburn Hills: MIS111874, minor permit, discharging to Clinton River, permit term to April 1, 2026
- AUTO PARTS CITY, Pontiac: MIS120668, minor permit, discharging to Osmun Lake, permit term to April 1, 2026
- BALDWIN PONTIAC TRANSFER STATION, Pontiac: MIS120680, minor permit, permit term to April 1, 2021
- CHRYSLER TECHNOLOGY CENTER, Auburn Hills: MIS120637, minor permit, permit term to April 1, 2021
- EASTERN OIL CO, Pontiac: MIS120663, minor permit, permit term to April 1, 2021
- FANUC AMERICA CORPORATION, Rochester Hills: MIS112123, minor permit, discharging to Clinton River, permit term to April 1, 2026
Identity
| Facility as filed | OAKLAND CO-PONTIAC WWTP |
|---|---|
| Permittee as filed | The Pontiac Wastewater Treatment Facility Drainage District |
| NPDES ID | MI0023825 |
| 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 1, 2016 |
| Expiration date | October 1, 2020 |
| Issuing agency | State |
| Address | Pontiac, MI 48342 |
| Receiving water | Clinton River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Pontiac Creek-Clinton River (HUC 040900030108) |
| Program components on file | Biosolids, POTW |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | ICIS-AIR source MI00000000000B1950 |
Effluent limits and exceedances
- 27Pollutants on file
- 27Under a numeric limit
- 3With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 12 | 7 | 7 | June 30, 2013 | 348% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 12 | 7 | 7 | April 30, 2026 | 250% over the limit |
| Coliform, fecal general | 2 | 1 | 1 | October 31, 2023 | 47% over the limit |
| Solids, total suspended | 12 | 0 | 0 | ||
| Mercury, total [as Hg] | 6 | 0 | 0 | ||
| Phosphorus, total [as P] | 4 | 0 | 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 | ||
| pH | 2 | 0 | 0 | ||
| Copper, total [as Cu] | 2 | 0 | 0 | ||
| Cyanide [A] | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 0 | 0 | ||
| Solids, suspended percent removal | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Chlorine, total residual | 1 | 0 | 0 |
Inspections, violations and enforcement
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 26, 2026 | Monitoring Violations - Analysis not Conducted | ST6 |
| February 26, 2026 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| October 16, 2025 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| June 3, 2025 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| August 18, 2021 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| August 18, 2021 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| January 10, 2019 | Effluent Violations - Narrative Effluent Violation | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| February 26, 2026 | Evaluation | 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 |
|---|---|---|
| May 22, 2026 | Notice of Violation | State |
| March 20, 2026 | Letter of Violation/ Warning Letter | State |
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.