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Clean Water Act discharge permit · NPDES MI0023531

MARQUETTE WWTP, Marquette, MI: NPDES MI0023531 discharge permit, effluent exceedances, inspections, penalties

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 (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedMARQUETTE WWTP
Permittee as filedCity of Marquette
NPDES IDMI0023531
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedFebruary 26, 2019
Expiration dateOctober 1, 2022
Issuing agencyState
AddressMarquette, MI 49855
Receiving water impaired303(D) Listed
SubwatershedCarp River (HUC 040201050102)
Program components on fileBiosolids, POTW
NAICS221320 – Sewage Treatment Facilities
SIC4952 – 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

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Phosphorus, total [as P]411436February 28, 2026366% over the limit
Oxygen, dissolved [DO]26519May 31, 202360% over the limit
Solids, total suspended416416May 31, 2023355% over the limit
Nitrogen, ammonia total [as N]1210212June 30, 201176% over the limit
pH28711March 31, 2026
Silver, total [as Ag]4168December 31, 20142,866% over the limit
BOD, carbonaceous [5 day, 20 C]41604May 31, 2023185% over the limit
Solids, suspended percent removal2434May 31, 2019117% over the limit
Mercury, total [as Hg]61502February 28, 200999,900% over the limit
Coliform, fecal general2822April 30, 202420% over the limit
Chlorine, total residual1432May 31, 2026797% over the limit
Toxicity, choice of species2121April 30, 2014147% over the limit
Toxicity [acute], Ceriodaphnia dubia1111April 30, 201460% over the limit
Hexachlorobenzene0940
Flow, in conduit or thru treatment plant2780
Solids, total3660
Arsenic, dry weight3660
Selenium, dry weight3660
Copper, dry weight3660
Cadmium, dry weight3660
Nitrogen, total Kjeldahl3660
Molybdenum, sludge, total, dry weight [as Mo]3660
Zinc, sludge, total, dry weight [as Zn]3660
Lead, sludge, total, dry weight [as Pb]3660
Nickel, sludge, total, dry weight [as Ni]3660
Nitrogen, sludge, total, dry weight [as N]3660
Mercury, sludge, total, dry weight [as Hg]3660
Potassium, sludge, total, dry weight [as K]3660
Phosphorus, sludge, total, dry weight [as P]3660
BOD, carb-5 day, 20 deg C, percent removal2390
Copper, total [as Cu]1340
Static 48 Hr Chronic Pimphales Promelas2110
TU Static 24 Hr Acute Pimephales promelas1100
Vanadium, total [as V]060
Cyanide [A]400

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

DateWhat EPA recordedAgency
October 31, 2025Reporting Violations - Late Submittal of DMRsST6
October 31, 2024Reporting Violations - Late Submittal of DMRsST6
April 21, 2022Reporting Violations - Late Submittal of DMRsST6
October 24, 2018Permit Violations - Discharge Without a Valid PermitST6
May 30, 2018Monitoring Violations - Failure to Monitor for Non-Toxicity RequirementsST6
April 15, 2018Permit Violations - Discharge Without a Valid PermitST6
May 4, 2017Monitoring Violations - Failure to Monitor for Non-Toxicity RequirementsST6

Inspections

EPA’s inspection file holds no inspection for NPDES MI0023531.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES MI0023531.

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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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers the Clean Water Act discharge permit NPDES MI0023531 for the Marquette WWTP in Marquette, MI, held by the City of Marquette, which is administratively continued and listed as a Major Discharger. The facts list 13 pollutants under a numeric limit and 13 pollutants with an effluent exceedance, and the permit's issue and expiration dates are February 26, 2019 and October 1, 2022.