Clean Water Act discharge permit · NPDES MI0021091
TAWAS UTILITY AUTHORITY WWTP, East Tawas, MI: NPDES MI0021091 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 28Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
TAWAS UTILITY AUTHORITY WWTP, held by Tawas Utility Authority, holds NPDES permit MI0021091, which discharges to Tawas River. EPA’s file records it issued April 29, 2020 and expiring October 1, 2024. 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 | TAWAS UTILITY AUTHORITY WWTP |
|---|---|
| Permittee as filed | Tawas Utility Authority |
| NPDES ID | MI0021091 |
| 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 | April 29, 2020 |
| Expiration date | October 1, 2024 |
| Issuing agency | State |
| Address | East Tawas, MI 48730 |
| Receiving water | Tawas River |
| Subwatershed | Tawas Lake-Tawas River (HUC 040801010105) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 30Pollutants on file
- 28Under a numeric limit
- 30With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 2 | 34 | 10 | April 30, 2026 | 9,877% over the limit |
| Solids, total suspended | 4 | 51 | 3 | September 30, 2020 | 113% over the limit |
| Solids, suspended percent removal | 2 | 15 | 3 | September 30, 2020 | 333% over the limit |
| Phosphorus, total [as P] | 4 | 26 | 2 | September 30, 2021 | 19% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 49 | 1 | November 30, 2022 | 5% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 13 | 1 | March 31, 2020 | 20% over the limit |
| Mercury, total [as Hg] | 6 | 56 | 0 | ||
| Perfluorooctanoic acid (PFOA) | 4 | 49 | 0 | ||
| pH | 2 | 24 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 24 | 0 | ||
| Nitrogen, ammonia total [as N] | 12 | 20 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 12 | 0 | ||
| Chlorine, total residual | 1 | 12 | 0 | ||
| Perfluorooctanesulfonate | 4 | 10 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 0 | 8 | 0 | ||
| Solids, total | 3 | 3 | 0 | ||
| Arsenic, dry weight | 3 | 3 | 0 | ||
| Selenium, dry weight | 3 | 3 | 0 | ||
| Copper, dry weight | 3 | 3 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 3 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 3 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 3 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 3 | 0 | ||
| Copper, total [as Cu] | 0 | 2 | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 29, 2023 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| October 19, 2022 | Monitoring Violations - Analysis not Conducted | ST6 |
| September 26, 2022 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| September 14, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| October 5, 2020 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| October 23, 2018 | Effluent Violations - Narrative Effluent Violation | ST6 |
| September 25, 2018 | Management Practice Violations - Improper Operation and Maintenance | 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
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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 MI0021091 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.