Velarion Records

Clean Water Act discharge permit · NPDES MIG640263

GREEN OAK WATER CO-HIDDEN LAKE, South Lyon, MI: NPDES MIG640263 discharge permit, effluent exceedances, inspections, penalties

GREEN OAK WATER CO-HIDDEN LAKE, held by Green Oak Water Company, holds NPDES permit MIG640263, which discharges to Hidden Lake. EPA’s file records it issued September 24, 2019 and expiring April 1, 2020. 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 filedGREEN OAK WATER CO-HIDDEN LAKE
Permittee as filedGreen Oak Water Company
NPDES IDMIG640263
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedSeptember 24, 2019
Expiration dateApril 1, 2020
Issuing agencyState
AddressSouth Lyon, MI 48178
Receiving waterHidden Lake
SubwatershedOre Lake-Huron River (HUC 040900050112)
NAICS221310 – Water Supply and Irrigation Systems
SIC4941 – Water Supply

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
Solids, total suspended0531January 31, 202551% over the limit
Chlorine, total residual0780
Phosphorus, total [as P]0520
Iron, total [as Fe]0520
Flow, in conduit or thru treatment plant0520
Chlorination duration0520
pH0400
Outfall observation,visual, y/n response0260

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
December 21, 2025Reporting Violations - Late Submittal of DMRsST6
January 23, 2025Monitoring Violations - Invalid/Unrepresentative SampleST6
January 23, 2025Monitoring Violations - Failure to Monitor for Non-Toxicity RequirementsST6
January 23, 2025Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)ST6
January 21, 2025Reporting Violations - Late Submittal of DMRsST6
December 21, 2024Reporting Violations - Late Submittal of DMRsST6
November 21, 2024Reporting Violations - Late Submittal of DMRsST6
October 21, 2024Reporting Violations - Late Submittal of DMRsST6
September 21, 2024Reporting Violations - Late Submittal of DMRsST6
August 21, 2024Reporting Violations - Late Submittal of DMRsST6
July 21, 2024Reporting Violations - Late Submittal of DMRsST6
June 21, 2024Reporting Violations - Late Submittal of DMRsST6
May 21, 2024Reporting Violations - Late Submittal of DMRsST6
April 21, 2024Reporting Violations - Late Submittal of DMRsST6
March 21, 2024Reporting Violations - Late Submittal of DMRsST6
February 21, 2024Reporting Violations - Late Submittal of DMRsST6
January 21, 2024Reporting Violations - Late Submittal of DMRsST6
December 21, 2023Reporting Violations - Late Submittal of DMRsST6
November 21, 2023Reporting Violations - Late Submittal of DMRsST6
October 21, 2023Reporting Violations - Late Submittal of DMRsST6
September 21, 2023Reporting Violations - Late Submittal of DMRsST6
August 21, 2023Reporting Violations - Late Submittal of DMRsST6
July 21, 2023Reporting Violations - Late Submittal of DMRsST6
June 21, 2023Reporting Violations - Late Submittal of DMRsST6
May 21, 2023Reporting Violations - Late Submittal of DMRsST6
April 21, 2023Reporting Violations - Late Submittal of DMRsST6
March 21, 2023Reporting Violations - Late Submittal of DMRsST6
February 21, 2023Reporting Violations - Late Submittal of DMRsST6
December 21, 2022Reporting Violations - Late Submittal of DMRsST6
June 1, 2018Monitoring Violations - Failure to Monitor for Non-Toxicity RequirementsST6
June 1, 2018Management Practice Violations - Failure to Maintain RecordsST6

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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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MIG640263 there.

Nearby on the register

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

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