Clean Water Act discharge permit · NPDES MI0023531
MARQUETTE WWTP, Marquette, MI: NPDES MI0023531 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 33Pollutants under a numeric limit
- 13Pollutants with an effluent exceedance
MARQUETTE WWTP, held by City of Marquette, holds NPDES permit MI0023531. EPA’s file records it issued February 26, 2019 and expiring October 1, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MARQUETTE WWTP |
|---|---|
| Permittee as filed | City of Marquette |
| NPDES ID | MI0023531 |
| 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 | February 26, 2019 |
| Expiration date | October 1, 2022 |
| Issuing agency | State |
| Address | Marquette, MI 49855 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Carp River (HUC 040201050102) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 35Pollutants on file
- 33Under a numeric limit
- 34With a violation of any kind
- 13With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 4 | 114 | 36 | February 28, 2026 | 366% over the limit |
| Oxygen, dissolved [DO] | 2 | 65 | 19 | May 31, 2023 | 60% over the limit |
| Solids, total suspended | 4 | 164 | 16 | May 31, 2023 | 355% over the limit |
| Nitrogen, ammonia total [as N] | 12 | 102 | 12 | June 30, 2011 | 76% over the limit |
| pH | 2 | 87 | 11 | March 31, 2026 | |
| Silver, total [as Ag] | 4 | 16 | 8 | December 31, 2014 | 2,866% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 160 | 4 | May 31, 2023 | 185% over the limit |
| Solids, suspended percent removal | 2 | 43 | 4 | May 31, 2019 | 117% over the limit |
| Mercury, total [as Hg] | 6 | 150 | 2 | February 28, 2009 | 99,900% over the limit |
| Coliform, fecal general | 2 | 82 | 2 | April 30, 2024 | 20% over the limit |
| Chlorine, total residual | 1 | 43 | 2 | May 31, 2026 | 797% over the limit |
| Toxicity, choice of species | 2 | 12 | 1 | April 30, 2014 | 147% over the limit |
| Toxicity [acute], Ceriodaphnia dubia | 1 | 11 | 1 | April 30, 2014 | 60% over the limit |
| Hexachlorobenzene | 0 | 94 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 78 | 0 | ||
| Solids, total | 3 | 66 | 0 | ||
| Arsenic, dry weight | 3 | 66 | 0 | ||
| Selenium, dry weight | 3 | 66 | 0 | ||
| Copper, dry weight | 3 | 66 | 0 | ||
| Cadmium, dry weight | 3 | 66 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 66 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 66 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 66 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 66 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 66 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 66 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 66 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 66 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 66 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 39 | 0 | ||
| Copper, total [as Cu] | 1 | 34 | 0 | ||
| Static 48 Hr Chronic Pimphales Promelas | 2 | 11 | 0 | ||
| TU Static 24 Hr Acute Pimephales promelas | 1 | 10 | 0 | ||
| Vanadium, total [as V] | 0 | 6 | 0 | ||
| Cyanide [A] | 4 | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 31, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 31, 2024 | Reporting Violations - Late Submittal of DMRs | ST6 |
| April 21, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 24, 2018 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| May 30, 2018 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| April 15, 2018 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| May 4, 2017 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | 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.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.