Clean Water Act discharge permit · NPDES MI0020389
ST CLAIR COUNTY-ALGONAC WWTP, Algonac, MI: NPDES MI0020389 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 28Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
- 2Inspections on file
- 0Formal enforcement actions
ST CLAIR COUNTY-ALGONAC WWTP, held by St. Clair County, Department of Public Works, holds NPDES permit MI0020389, which discharges to St. Clair River. EPA’s file records it issued March 27, 2015 and expiring October 1, 2018.
ST CLAIR COUNTY-ALGONAC WWTP, Algonac, Michigan: Individual permit MI0020389, held by St. Clair County, Department of Public Works; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued March 27, 2015, term to October 1, 2018, by State; discharges to St. Clair River; Sewage Treatment Facilities.
- Chlorine, total residual: 1 limit, 6 violations of any kind, 2 effluent exceedances, latest October 31, 2014, largest 689% over the limit.
- pH: 2 limits, 15 violations of any kind, 1 effluent exceedance, latest February 28, 2011.
- Coliform, fecal general: 2 limits, 15 violations of any kind, 1 effluent exceedance, latest November 30, 2011, largest 25% over the limit.
- Phosphorus, total [as P]: 4 limits, 9 violations of any kind, 1 effluent exceedance, latest December 31, 2013, largest 410% over the limit.
- Oxygen, dissolved [DO]: 1 limit, 9 violations of any kind, 1 effluent exceedance, latest August 31, 2014, largest 50% over the limit.
- Solids, suspended percent removal: 2 limits, 8 violations of any kind, 1 effluent exceedance, latest June 30, 2019, largest 15% over the limit.
- Mercury, total [as Hg]: 6 limits, 48 violations of any kind, 0 effluent exceedances.
- Zinc, total [as Zn]: 0 limits, 40 violations of any kind, 0 effluent exceedances.
- Solids, total suspended: 4 limits, 16 violations of any kind, 0 effluent exceedances.
- BOD, carbonaceous [5 day, 20 C]: 4 limits, 16 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 2 limits, 16 violations of any kind, 0 effluent exceedances.
- Nitrogen, ammonia total [as N]: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- BOD, carb-5 day, 20 deg C, percent removal: 2 limits, 7 violations of any kind, 0 effluent exceedances.
- Copper, total [as Cu]: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Chromium, total [as Cr]: 0 limits, 6 violations of any kind, 0 effluent exceedances.
- Solids, total: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Nitrogen, total Kjeldahl: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Nitrogen, sludge, total, dry weight [as N]: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Potassium, sludge, total, dry weight [as K]: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Phosphorus, sludge, total, dry weight [as P]: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Cyanide [A]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- August 26, 2026: Evaluation (S).
- March 24, 2026: Evaluation (S).
Michigan holds 200 Publicly owned treatment works coverages of this permit type in EPA’s file; 23 were issued before MI0020389.
Coverages issued nearest MI0020389
- October 21, 2014: ST CLAIR RIVER SA WWTP, East China, MI0022845, held by St. Clair River Sewer Authority
- January 15, 2015: SOUTH LYON WWTP, South Lyon, MI0020273, held by City of South Lyon
- January 21, 2015: MATCH-BE-NASH-SHE-WISH BAND OF POTTAWATOMI INDIANS TRIBAL UTILITY AUTHORITY WWTF, Wayland, MI0058661, held by GUN LAKE GAMING/ENTERTAINMENT
- February 9, 2015: ST JOHNS WWTP, St Johns, MI0026468, held by City of St. Johns
- March 24, 2015: MT PLEASANT WWTP, Mount Pleasant, MI0023655
- April 3, 2015: IRON MOUNTAIN-KINGSFORD WWTP, Kingsford, MI0023205, held by Iron Mountain/Kingsford Joint Sewage Authority
- April 3, 2015: MILFORD WWTP, Milford, MI0023604, held by Village of Milford
- April 24, 2015: HANNAHVILLE INDIAN COMM. WWTP, Wilson, MI0057366, held by Hannahville Community WWTP
- June 18, 2015: ROCKWOOD WWTP, Rockwood, MI0021181, held by City of Rockwood
- September 24, 2015: GREENVILLE WWTP, Greenville, MI0020397, held by City of Greenville
ST CLAIR COUNTY-ALGONAC WWTP among its neighbors
EPA’s permit file holds 9 discharge permits in the Swartout Creek-Frontal Anchor Bay subwatershed (HUC 040900020101), MI0020389 among them. Its county holds 17, 4 of them major permits; MI0020389 is a major permit.
Other permits in the Swartout Creek-Frontal Anchor Bay subwatershed (HUC 040900020101)
- ALGONAC MS4-ST CLAIR, Algonac: MI0060153, minor permit, permit term to October 1, 2028
- ALGONAC SAND & SUPPLY LLC, Algonac: MIG490324, minor permit, discharging to North Channel Saint Clair River, permit term to April 1, 2020
- BUDS GARAGE & AUTO MORTUARY, Algonac: MIS520067, minor permit, discharging to St. Clair River, permit term to April 1, 2025
- CLAY TWP MS4-ST CLAIR, Clay: MI0060152, minor permit, permit term to October 1, 2024
- MARINE CITY WWTP, Marine City: MI0020893, major permit, discharging to St. Clair River, permit term to October 1, 2023
- MONNIER-ALGONAC, Algonac: MIS510857, minor permit, discharging to Saint Clair River, permit term to April 1, 2025
- RIVERSIDE SPLINE & GEAR INC, Marine City: MIS410850, minor permit, permit term to April 1, 2024
- SASSY MARINE-ALGONAC, Algonac: MIS510851, minor permit, discharging to North Channel Saint Clair River, permit term to April 1, 2025
Identity
| Facility as filed | ST CLAIR COUNTY-ALGONAC WWTP |
|---|---|
| Permittee as filed | St. Clair County, Department of Public Works |
| NPDES ID | MI0020389 |
| 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 | March 27, 2015 |
| Expiration date | October 1, 2018 |
| Issuing agency | State |
| Address | Algonac, MI 48001 |
| Receiving water | St. Clair River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Swartout Creek-Frontal Anchor Bay (HUC 040900020101) |
| Program components on file | Biosolids, POTW |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 30Pollutants on file
- 28Under a numeric limit
- 29With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 1 | 6 | 2 | October 31, 2014 | 689% over the limit |
| pH | 2 | 15 | 1 | February 28, 2011 | |
| Coliform, fecal general | 2 | 15 | 1 | November 30, 2011 | 25% over the limit |
| Phosphorus, total [as P] | 4 | 9 | 1 | December 31, 2013 | 410% over the limit |
| Oxygen, dissolved [DO] | 1 | 9 | 1 | August 31, 2014 | 50% over the limit |
| Solids, suspended percent removal | 2 | 8 | 1 | June 30, 2019 | 15% over the limit |
| Mercury, total [as Hg] | 6 | 48 | 0 | ||
| Zinc, total [as Zn] | 0 | 40 | 0 | ||
| Solids, total suspended | 4 | 16 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 16 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 16 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 10 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 7 | 0 | ||
| Copper, total [as Cu] | 2 | 6 | 0 | ||
| Chromium, total [as Cr] | 0 | 6 | 0 | ||
| Solids, total | 3 | 5 | 0 | ||
| Arsenic, dry weight | 3 | 5 | 0 | ||
| Selenium, dry weight | 3 | 5 | 0 | ||
| Copper, dry weight | 3 | 5 | 0 | ||
| Cadmium, dry weight | 3 | 5 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 5 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 5 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 5 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 5 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 5 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 5 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 5 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 5 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 5 | 0 | ||
| Cyanide [A] | 2 | 0 | 0 |
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MI0020389.
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| August 26, 2026 | Evaluation | S |
| March 24, 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
EPA’s informal enforcement file holds no action for NPDES MI0020389.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.