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Clean Water Act discharge permit · NPDES MI0020397

GREENVILLE WWTP, Greenville, MI: NPDES MI0020397 discharge permit, effluent exceedances, inspections, penalties

GREENVILLE WWTP, held by City of Greenville, holds NPDES permit MI0020397, which discharges to Flat River. EPA’s file records it issued September 24, 2015 and expiring October 1, 2019. 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 filedGREENVILLE WWTP
Permittee as filedCity of Greenville
NPDES IDMI0020397
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 24, 2015
Expiration dateOctober 1, 2019
Issuing agencyState
AddressGreenville, MI 48838
Receiving waterFlat River
SubwatershedSanderson Lake-Flat River (HUC 040500060206)
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
Chlorine, total residual13126November 30, 20251,439% over the limit
Solids, total suspended44319December 31, 202381% over the limit
Phosphorus, total [as P]4208May 31, 2024138% over the limit
Nitrogen, ammonia total [as N]4138August 31, 2020385% over the limit
BOD, carbonaceous [5 day, 20 C]8317July 31, 2023393% over the limit
Solids, suspended percent removal2126July 31, 202279% over the limit
Oxygen, dissolved [DO]293July 31, 201967% over the limit
Mercury, total [as Hg]6292December 31, 2013247% over the limit
Coliform, fecal general2122August 31, 2012166% over the limit
Toxicity [acute], Ceriodaphnia dubia122November 30, 2017130% over the limit
pH2111May 31, 2025
Copper, total [as Cu]0180
Flow, in conduit or thru treatment plant2100
BOD, carb-5 day, 20 deg C, percent removal260
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
TU Static 24 Hr Acute Pimephales promelas100

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
September 4, 2024Reporting Violations - Failure to NotifyST6
May 30, 2024Management Practice Violations - Failure to Maintain RecordsST6
May 30, 2024Monitoring Violations - Invalid/Unrepresentative SampleST6
April 15, 2024Monitoring Violations - Analysis not ConductedST6
January 17, 2024Reporting Violations - Failure to NotifyST6
August 4, 2023Reporting Violations - Failure to NotifyST6
March 15, 2023Reporting Violations - Failure to NotifyST6
March 3, 2023Reporting Violations - Failure to NotifyST6
November 1, 2022Reporting Violations - Failure to NotifyST6
April 15, 2022Monitoring Violations - Analysis not ConductedST6
March 1, 2022Monitoring Violations - Failure to Monitor for Non-Toxicity RequirementsST6
February 17, 2022Monitoring Violations - Failure to Monitor for Non-Toxicity RequirementsST6
August 24, 2021WW SSO - Discharge to WatersST6
August 24, 2021Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environmentST6
August 11, 2021WW SSO - Discharge to WatersST6
August 11, 2021Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environmentST6
November 23, 2020Monitoring Violations - Failure to Monitor for Non-Toxicity RequirementsST6
March 25, 2020Monitoring Violations - Failure to Monitor for Non-Toxicity RequirementsST6
September 12, 2019Management Practice Violations - Improper Operation and MaintenanceST6
February 10, 2019WW SSO - Discharge to WatersST6
February 10, 2019Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environmentST6
February 8, 2018Management Practice Violations - Improper Operation and MaintenanceST6
February 8, 2018Monitoring Violations - Invalid/Unrepresentative SampleST6
August 31, 2017Monitoring Violations - Failure to Monitor for Non-Toxicity RequirementsST6
August 11, 2017Pretreatment - Failure to Enforce Against I/UST6
August 11, 2017Pretreatment - Failure to Develop/Enforce StandardsST6
August 11, 2017Failure to enforce standards, local limits, and reporting requirements (>15% SNC SIU) (Level II)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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Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES MI0020397 for GREENVILLE WWTP in Greenville, MI, held by City of Greenville, which discharges to Flat River. The permit is administratively continued and is classed as a Major Discharger, with 28 pollutants under a numeric limit and 11 pollutants with an effluent exceedance on file.