Clean Water Act discharge permit · NPDES MI0020583
TECUMSEH WWTP, Tecumseh, MI: NPDES MI0020583 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 25Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
TECUMSEH WWTP, held by City of Tecumseh, holds NPDES permit MI0020583, which discharges to River Raisin. EPA’s file records it issued November 2, 2016 and expiring October 1, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | TECUMSEH WWTP |
|---|---|
| Permittee as filed | City of Tecumseh |
| NPDES ID | MI0020583 |
| 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 | November 2, 2016 |
| Expiration date | October 1, 2022 |
| Issuing agency | State |
| Address | Tecumseh, MI 49286 |
| Receiving water | River Raisin |
| Subwatershed | Red Mill Pond-River Raisin (HUC 041000020108) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 33Pollutants on file
- 25Under a numeric limit
- 33With a violation of any kind
- 2With 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] | 10 | 72 | 4 | June 30, 2020 | 165% over the limit |
| Oxygen, dissolved [DO] | 3 | 29 | 1 | June 30, 2020 | 3% over the limit |
| Mercury, total [as Hg] | 6 | 361 | 0 | ||
| Solids, total suspended | 8 | 118 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 8 | 116 | 0 | ||
| Coliform, fecal general | 2 | 66 | 0 | ||
| Phosphorus, total [as P] | 4 | 58 | 0 | ||
| pH | 2 | 56 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 56 | 0 | ||
| Cyanide [A] | 0 | 28 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 16 | 0 | ||
| Solids, suspended percent removal | 2 | 14 | 0 | ||
| Chlorine, total residual | 0 | 13 | 0 | ||
| Selenium, dry weight | 3 | 5 | 0 | ||
| Boron, total [as B] | 0 | 5 | 0 | ||
| Copper, total [as Cu] | 0 | 5 | 0 | ||
| Solids, total | 3 | 4 | 0 | ||
| Arsenic, dry weight | 3 | 4 | 0 | ||
| Copper, dry weight | 3 | 4 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 4 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 4 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 4 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 4 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 4 | 0 | ||
| Toxicity, choice of species | 0 | 4 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 0 | 4 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 3 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 2 | 0 | ||
| Chloride [as Cl] | 0 | 1 | 0 | ||
| Sulfate, total [as SO4] | 0 | 1 | 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
- 12Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 3, 2025 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| March 11, 2025 | Management Practice Violations - Failure to Maintain Records | ST6 |
| November 22, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| July 16, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| April 3, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| January 26, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| January 10, 2024 | Management Practice Violations - Failure to Maintain Records | ST6 |
| September 20, 2022 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| August 25, 2017 | Reporting Violations - Improper/ Incorrect Reporting | EP6 |
| August 25, 2017 | Management Practice Violations - Failure to Maintain Records | EP6 |
| August 25, 2017 | Monitoring Violations - Invalid/Unrepresentative Sample | EP6 |
| August 25, 2017 | Monitoring Violations - Improper Analysis or Lab Error | EP6 |
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.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.