Clean Water Act discharge permit · NPDES MI0023787
PETOSKEY WWTP, Petoskey, MI: NPDES MI0023787 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 27Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
PETOSKEY WWTP, held by City of Petoskey, holds NPDES permit MI0023787, which discharges to Lake Michigan. EPA’s file records it issued June 28, 2020 and expiring October 1, 2024. 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 | PETOSKEY WWTP |
|---|---|
| Permittee as filed | City of Petoskey |
| NPDES ID | MI0023787 |
| 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 | June 28, 2020 |
| Expiration date | October 1, 2024 |
| Issuing agency | State |
| Address | Petoskey, MI 49770 |
| Receiving water | Lake Michigan |
| Subwatershed | Susan Creek-Frontal Lake Michigan (HUC 040601050607) |
| 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
- 29Pollutants on file
- 27Under a numeric limit
- 14With a violation of any kind
- 4With 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 | 11 | 9 | April 30, 2026 | 12,366% over the limit |
| Phosphorus, total [as P] | 4 | 12 | 1 | August 31, 2014 | 500% over the limit |
| Coliform, fecal general | 2 | 7 | 1 | November 30, 2017 | 61% over the limit |
| Hexachlorobenzene | 0 | 1 | 1 | March 31, 2026 | 99,900% over the limit |
| Solids, total suspended | 4 | 18 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 18 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 12 | 0 | ||
| pH | 2 | 6 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 3 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 3 | 0 | ||
| Solids, suspended percent removal | 2 | 3 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 3 | 0 | ||
| Barium, total [as Ba] | 0 | 3 | 0 | ||
| Mercury, total [as Hg] | 4 | 2 | 0 | ||
| Solids, total | 3 | 0 | 0 | ||
| Arsenic, dry weight | 3 | 0 | 0 | ||
| Selenium, dry weight | 3 | 0 | 0 | ||
| Copper, dry weight | 3 | 0 | 0 | ||
| Cadmium, dry weight | 3 | 0 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 0 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 0 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 0 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 0 | 0 | ||
| Copper, total [as Cu] | 2 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 18, 2025 | Monitoring Violations - Analysis not Conducted | ST6 |
| July 8, 2022 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| May 21, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| July 17, 2017 | Monitoring Violations - Improper Analysis or Lab Error | 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 MI0023787 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.