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Clean Water Act discharge permit · NPDES MI0020303

CHEBOYGAN WWTP, Cheboygan, MI: NPDES MI0020303 discharge permit, effluent exceedances, inspections, penalties

CHEBOYGAN WWTP, held by City of Cheboygan, holds NPDES permit MI0020303, which discharges to Cheboygan River. EPA’s file records it issued September 28, 2017 and expiring October 1, 2021. 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 filedCHEBOYGAN WWTP
Permittee as filedCity of Cheboygan
NPDES IDMI0020303
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
IssuedSeptember 28, 2017
Expiration dateOctober 1, 2021
Issuing agencyState
AddressCheboygan, MI 49721
Receiving waterCheboygan River
SubwatershedTannery Gully-Cheboygan River (HUC 040700040404)
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
BOD, carb-5 day, 20 deg C, percent removal2118106May 31, 2026567% over the limit
Solids, suspended percent removal210897May 31, 2026567% over the limit
BOD, carbonaceous [5 day, 20 C]48147February 28, 202398% over the limit
Mercury, total [as Hg]66244July 31, 2021150% over the limit
Coliform, fecal general23022April 30, 20231,424% over the limit
Solids, total suspended44713June 30, 202570% over the limit
pH2168March 31, 2023
Chlorine, total residual1117November 30, 202293,584% over the limit
Oxygen, dissolved [DO]184October 31, 201595% over the limit
Phosphorus, total [as P]4271March 31, 20037% over the limit
Flow, in conduit or thru treatment plant2260
Nitrogen, ammonia total [as N]2210
Chloride [as Cl]040
Sulfate, total [as SO4]040
Cyanide [A]220
Solids, total300
Arsenic, dry weight300
Selenium, dry weight300
Copper, dry weight300
Cadmium, dry weight300
Nitrogen, total Kjeldahl300
Molybdenum, sludge, total, dry weight [as Mo]300
Zinc, sludge, total, dry weight [as Zn]300
Lead, sludge, total, dry weight [as Pb]300
Nickel, sludge, total, dry weight [as Ni]300
Nitrogen, sludge, total, dry weight [as N]300
Mercury, sludge, total, dry weight [as Hg]300
Potassium, sludge, total, dry weight [as K]300
Phosphorus, sludge, total, dry weight [as P]300
Copper, total [as Cu]200

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
May 21, 2025Reporting Violations - Late Submittal of DMRsST6
April 21, 2025Reporting Violations - Late Submittal of DMRsST6
March 21, 2025Reporting Violations - Late Submittal of DMRsST6
July 17, 2024Monitoring Violations - Invalid/Unrepresentative SampleST6
July 17, 2024Monitoring Violations - Improper Analysis or Lab ErrorST6
May 21, 2024Reporting Violations - Late Submittal of DMRsST6
April 21, 2024Reporting Violations - Late Submittal of DMRsST6
March 21, 2024Reporting Violations - Late Submittal of DMRsST6
March 21, 2024Monitoring Violations - Analysis not ConductedST6
February 21, 2024Reporting Violations - Late Submittal of DMRsST6
January 21, 2024Reporting Violations - Late Submittal of DMRsST6
November 21, 2022Reporting Violations - Late Submittal of DMRsST6
October 31, 2022Reporting Violations - Late Submittal of DMRsST6
April 21, 2022Reporting Violations - Late Submittal of DMRsST6
October 26, 2021WW SSO - Discharge to WatersST6
October 26, 2021Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environmentST6
April 6, 2021Management Practice Violations - Improper Operation and MaintenanceST6
October 31, 2020Reporting Violations - Late Submittal of DMRsST6
January 21, 2020Reporting Violations - Late Submittal of DMRsST6
August 28, 2018Management Practice Violations - Improper Operation and MaintenanceST6
October 31, 2017Reporting Violations - Late Submittal of DMRsST6

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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Nearby on the register

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

What this page shows

This public-records page covers NPDES permit MI0020303 for the CHEBOYGAN WWTP in Cheboygan, MI, held by City of Cheboygan and discharging to the Cheboygan River, with its permit status listed as administratively continued. The page lists a major discharger class, 10 pollutants under a numeric limit, and 28 pollutants with an effluent exceedance.