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Clean Water Act discharge permit · NPDES MI0046957

MANTHEI-PETOSKEY, Petoskey, MI: NPDES MI0046957 discharge permit, effluent exceedances, inspections, penalties

MANTHEI-PETOSKEY, held by Manthei, Incorporated, holds NPDES permit MI0046957, which discharges to Walloon Lake. EPA’s file records it issued March 31, 2020 and expiring October 1, 2024. 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 filedMANTHEI-PETOSKEY
Permittee as filedManthei, Incorporated
NPDES IDMI0046957
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedMarch 31, 2020
Expiration dateOctober 1, 2024
Issuing agencyState
AddressPetoskey, MI 49770
Receiving waterWalloon Lake
Receiving water impaired303(D) Listed
SubwatershedWalloon Lake-Bear River (HUC 040601050102)
Other EPA IDs (FRS)ICIS-AIR source MI00000000000A0998

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

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]4976July 31, 2026600% over the limit
pH21511March 31, 2015
Flow, in conduit or thru treatment plant21500
Outfall observation,visual, y/n response1760
Solids, total dissolved0320

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
November 21, 2025Reporting Violations - Late Submittal of DMRsST6
April 21, 2025Reporting Violations - Late Submittal of DMRsST6
April 10, 2025Management Practice Violations - Failure to Maintain RecordsST6
April 10, 2025Monitoring Violations - Improper Analysis or Lab ErrorST6
June 21, 2024Reporting Violations - Late Submittal of DMRsST6
August 21, 2022Reporting Violations - Late Submittal of DMRsST6
August 1, 2022Management Practice Violations - Failure to Maintain RecordsST6
February 21, 2022Reporting Violations - Late Submittal of DMRsST6
November 21, 2020Reporting Violations - Late Submittal of DMRsST6
September 17, 2020Monitoring Violations - Improper Analysis or Lab ErrorST6
September 17, 2020Monitoring Violations - Invalid/Unrepresentative SampleST6
October 21, 2019Reporting Violations - Late Submittal of DMRsST6
May 21, 2019Reporting Violations - Late Submittal of DMRsST6
April 21, 2019Reporting Violations - Late Submittal of DMRsST6
March 21, 2019Reporting Violations - Late Submittal of DMRsST6
February 21, 2019Reporting Violations - Late Submittal of DMRsST6
December 21, 2018Reporting Violations - Late Submittal of DMRsST6
September 21, 2018Reporting Violations - Late Submittal of DMRsST6
August 21, 2018Reporting Violations - Late Submittal of DMRsST6
May 21, 2018Reporting Violations - Late Submittal of DMRsST6
April 21, 2018Reporting Violations - Late Submittal of DMRsST6
March 21, 2018Reporting Violations - Late Submittal of DMRsST6
November 21, 2017Reporting Violations - Late Submittal of DMRsST6
October 21, 2017Reporting Violations - Late Submittal of DMRsST6
September 21, 2017Reporting Violations - Late Submittal of DMRsST6
August 21, 2017Reporting Violations - Late Submittal of DMRsST6
June 21, 2017Reporting Violations - Late Submittal of DMRsST6
May 21, 2017Reporting Violations - Late Submittal of DMRsST6
April 4, 2017Management Practice Violations - Failure to Maintain RecordsST6
April 4, 2017WW Storm Water Non-Construction - Failure to develop any or adequate SWPPP/SWMPST6
February 21, 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 September 15, 2026.

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES MI0046957 for MANTHEI-PETOSKEY in Petoskey, MI, held by Manthei, Incorporated, which discharges to Walloon Lake and is listed in subwatershed HUC 040601050102 (Walloon Lake-Bear River). The permit is classed as a minor discharger, is administratively continued, and the page reports 2 pollutants under a numeric limit and 2 pollutants with an effluent exceedance.