Clean Water Act discharge permit · NPDES MI0055808
UNION TWP WWTP, Mount Pleasant, MI: NPDES MI0055808 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 13Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
UNION TWP WWTP, held by UNION TOWNSHIP WWTP, holds NPDES permit MI0055808, which discharges to Chippewa River. EPA’s file records it issued May 30, 2017 and expiring May 16, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | UNION TWP WWTP |
|---|---|
| Permittee as filed | UNION TOWNSHIP WWTP |
| NPDES ID | MI0055808 |
| 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 | May 30, 2017 |
| Expiration date | May 16, 2022 |
| Address | Mount Pleasant, MI 48858 |
| Receiving water | CHIPPEWA RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Mission Creek-Chippewa River (HUC 040802020501) |
| Program components on file | Biosolids, POTW |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 15Pollutants on file
- 13Under a numeric limit
- 7With 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] | 12 | 5 | 5 | August 31, 2013 | 12,500% over the limit |
| pH | 12 | 1 | 1 | February 28, 2015 | |
| Mercury, total [as Hg] | 16 | 21 | 0 | ||
| Description of pathogen option used | 0 | 15 | 0 | ||
| BOD, 5-day, 20 deg. C | 12 | 8 | 0 | ||
| Selenium, total [as Se] | 0 | 8 | 0 | ||
| Solids, total suspended | 36 | 6 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 36 | 0 | 0 | ||
| Phosphorus, total [as P] | 12 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 9 | 0 | 0 | ||
| E. coli | 6 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 3 | 0 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 3 | 0 | 0 | ||
| Solids, suspended percent removal | 3 | 0 | 0 | ||
| Outfall observation,visual, y/n response | 3 | 0 | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 25, 2019 | Management Practice Violations - Improper Operation and Maintenance | EP6 |
| April 25, 2019 | Permit Violations - Violation Specified in Comment | EP6 |
| April 25, 2019 | Monitoring Violations - Invalid/Unrepresentative Sample | 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.
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 MI0055808 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.