Clean Water Act discharge permit · NPDES MI0021008
SOUTHERN CLINTON CO WWTP, Dewitt, MI: NPDES MI0021008 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 26Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
SOUTHERN CLINTON CO WWTP, held by Southern Clinton County Municipal Utilities Authority, holds NPDES permit MI0021008, which discharges to Looking Glass River. EPA’s file records it issued July 7, 2014 and expiring October 1, 2018.
SOUTHERN CLINTON CO WWTP, Dewitt, Michigan: Individual permit MI0021008, held by Southern Clinton County Municipal Utilities Authority; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued July 7, 2014, term to October 1, 2018, by State; discharges to Looking Glass River.
- Nitrogen, ammonia total [as N]: 6 limits, 17 violations of any kind, 11 effluent exceedances, latest June 30, 2026, largest 390% over the limit.
- Chlorine, total residual: 1 limit, 13 violations of any kind, 4 effluent exceedances, latest October 31, 2017, largest 111% over the limit.
- pH: 2 limits, 21 violations of any kind, 3 effluent exceedances, latest January 31, 2022.
- BOD, carbonaceous [5 day, 20 C]: 12 limits, 53 violations of any kind, 2 effluent exceedances, latest April 30, 2021, largest 192% over the limit.
- Coliform, fecal general: 2 limits, 17 violations of any kind, 1 effluent exceedance, latest January 31, 2006, largest 2% over the limit.
- Mercury, total [as Hg]: 4 limits, 105 violations of any kind, 0 effluent exceedances.
- Perfluorooctanesulfonate: 0 limits, 46 violations of any kind, 0 effluent exceedances.
- Solids, total suspended: 8 limits, 40 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 2 limits, 20 violations of any kind, 0 effluent exceedances.
- Phosphorus, total [as P]: 4 limits, 18 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 0 limits, 10 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 2 limits, 9 violations of any kind, 0 effluent exceedances.
- Solids, suspended percent removal: 2 limits, 8 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.
- Vanadium, total [as V]: 0 limits, 7 violations of any kind, 0 effluent exceedances.
- Solids, total: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Nitrogen, total Kjeldahl: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 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.
- 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.
- Potassium, sludge, total, dry weight [as K]: 3 limits, 5 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 3 limits, 4 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 4 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 4 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 4 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 4 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 4 violations of any kind, 0 effluent exceedances.
- Phosphorus, sludge, total, dry weight [as P]: 3 limits, 4 violations of any kind, 0 effluent exceedances.
- Copper, total [as Cu]: 0 limits, 4 violations of any kind, 0 effluent exceedances.
- January 9, 2026: Letter of Violation/ Warning Letter (State).
- July 17, 2024: Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements (ST6).
- July 17, 2024: Management Practice Violations - Failure to Maintain Records (ST6).
- March 7, 2023: Pretreatment - Failure to Enforce Against I/U (ST6).
- March 7, 2023: Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements (ST6).
- March 7, 2023: Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) (ST6).
- March 3, 2022: Monitoring Violations - Frequency of Sampling Violation (ST6).
- August 29, 2019: Effluent Violations - Numeric effluent violation (ST6).
- January 1, 2019: Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements (ST6).
- January 1, 2017: Pretreatment - Failure to Develop/Enforce Standards (ST6).
- January 1, 2017: Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) (ST6).
Michigan holds 200 Publicly owned treatment works coverages of this permit type in EPA’s file; 14 were issued before MI0021008.
Coverages issued nearest MI0021008
- September 26, 2013: DOWAGIAC WWTP, Dowagiac, MI0022837, held by City of Dowagiac
- September 30, 2013: TRENTON WWTP, Trenton, MI0021164, held by City of Trenton
- May 16, 2014: DEARBORN CSO, Dearborn, MI0025542, held by City of Dearborn
- June 25, 2014: BRIGHTON WWTP, Brighton, MI0020877, held by City of Brighton
- July 1, 2014: NORTHFIELD TWP WWTP, Whitmore Lake, MI0023710, held by Northfield Township
- August 5, 2014: MENOMINEE WWTP, Menominee, MI0025631, held by City of Menominee
- September 30, 2014: ST CLAIR WWTP, St. Clair, MI0020591, held by City of St. Clair
- September 30, 2014: BRIGHTON TWP WWTP, Brighton, MI0054968, held by Brighton Township
- 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
SOUTHERN CLINTON CO WWTP among its neighbors
EPA’s permit file holds 6 discharge permits in the Summers Drain-Looking Glass River subwatershed (HUC 040500040610), MI0021008 among them. Its county holds 16, 2 of them major permits; MI0021008 is a major permit.
Other permits in the Summers Drain-Looking Glass River subwatershed (HUC 040500040610)
- DEWITT MS4-CLINTON, Dewitt: MI0059716, minor permit, permit term to October 1, 2024
- DEWITT TWP MS4-CLINTON, Dewitt: MI0059738, minor permit, permit term to October 1, 2024
- LYDEN OIL COMPANY-NATIONAL PARKWAY, Lansing: MIS410811, minor permit, discharging to Looking Glass River, permit term to April 1, 2024
- MARATHON PETRO CO-LANSING, Lansing: MIG670293, minor permit, discharging to LOOKING GLASS RIVER, permit term to April 1, 2013
- MPLX TERMINALS LLC-LANSING TERMINAL, Lansing: MIS420035, minor permit, permit term to April 1, 2024
Identity
| Facility as filed | SOUTHERN CLINTON CO WWTP |
|---|---|
| Permittee as filed | Southern Clinton County Municipal Utilities Authority |
| NPDES ID | MI0021008 |
| 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 | July 7, 2014 |
| Expiration date | October 1, 2018 |
| Issuing agency | State |
| Address | Dewitt, MI 48820 |
| Receiving water | Looking Glass River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Summers Drain-Looking Glass River (HUC 040500040610) |
| Other EPA IDs (FRS) | RCRA handler MID981089089 |
Effluent limits and exceedances
- 30Pollutants on file
- 26Under a numeric limit
- 30With a violation of any kind
- 5With 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] | 6 | 17 | 11 | June 30, 2026 | 390% over the limit |
| Chlorine, total residual | 1 | 13 | 4 | October 31, 2017 | 111% over the limit |
| pH | 2 | 21 | 3 | January 31, 2022 | |
| BOD, carbonaceous [5 day, 20 C] | 12 | 53 | 2 | April 30, 2021 | 192% over the limit |
| Coliform, fecal general | 2 | 17 | 1 | January 31, 2006 | 2% over the limit |
| Mercury, total [as Hg] | 4 | 105 | 0 | ||
| Perfluorooctanesulfonate | 0 | 46 | 0 | ||
| Solids, total suspended | 8 | 40 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 20 | 0 | ||
| Phosphorus, total [as P] | 4 | 18 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 0 | 10 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 9 | 0 | ||
| Solids, suspended percent removal | 2 | 8 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 7 | 0 | ||
| Vanadium, total [as V] | 0 | 7 | 0 | ||
| Solids, total | 3 | 6 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 6 | 0 | ||
| Cadmium, dry weight | 3 | 5 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 5 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 5 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 5 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 5 | 0 | ||
| Arsenic, dry weight | 3 | 4 | 0 | ||
| Selenium, dry weight | 3 | 4 | 0 | ||
| Copper, dry weight | 3 | 4 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 4 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 4 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 4 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 4 | 0 | ||
| Copper, total [as Cu] | 0 | 4 | 0 |
Inspections, violations and enforcement
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 17, 2024 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| July 17, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| March 7, 2023 | Pretreatment - Failure to Enforce Against I/U | ST6 |
| March 7, 2023 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| March 7, 2023 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
| March 3, 2022 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| August 29, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| January 1, 2019 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| January 1, 2017 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| January 1, 2017 | Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II) | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES MI0021008.
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 |
|---|---|---|
| January 9, 2026 | Letter of Violation/ Warning Letter | State |
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.