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Clean Water Act discharge permit · NPDES MIG580290

MDNR-SLEEPY HOLLOW STATE PARK, Laingsburg, MI: NPDES MIG580290 discharge permit, effluent exceedances, inspections, penalties

MDNR-SLEEPY HOLLOW STATE PARK, held by Michigan Department of Natural Resources, holds NPDES permit MIG580290, which discharges to Little Maple River. EPA’s file records it issued August 26, 2021 and expiring April 1, 2024. 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 filedMDNR-SLEEPY HOLLOW STATE PARK
Permittee as filedMichigan Department of Natural Resources
NPDES IDMIG580290
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
IssuedAugust 26, 2021
Expiration dateApril 1, 2024
Issuing agencyState
AddressLaingsburg, MI 48848
Receiving waterLittle Maple River
SubwatershedLittle Maple River (HUC 040500050104)
NAICS721211 – Rv [Recreational Vehicle] Parks and Campgrounds
SIC7033 – Trailer Parks And Campsites

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
pH2582May 31, 2024
Phosphorus, total [as P]2462May 31, 201975% over the limit
Solids, total suspended4560
BOD, 5-day, 20 deg. C2560
Flow, in conduit or thru treatment plant2560
Coliform, fecal general2560
Nitrogen, ammonia total [as N]2430
Oxygen, dissolved [DO]1280
Solids, total330
Arsenic, dry weight330
Selenium, dry weight330
Copper, dry weight330
Cadmium, dry weight330
Nitrogen, total Kjeldahl330
Molybdenum, sludge, total, dry weight [as Mo]330
Zinc, sludge, total, dry weight [as Zn]330
Lead, sludge, total, dry weight [as Pb]330
Nickel, sludge, total, dry weight [as Ni]330
Nitrogen, sludge, total, dry weight [as N]330
Mercury, sludge, total, dry weight [as Hg]330
Potassium, sludge, total, dry weight [as K]330
Phosphorus, sludge, total, dry weight [as P]330

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
January 21, 2026Reporting Violations - Late Submittal of DMRsST6
December 21, 2025Reporting Violations - Late Submittal of DMRsST6
November 21, 2025Reporting Violations - Late Submittal of DMRsST6
July 11, 2025Management Practice Violations - Failure to Maintain RecordsST6
July 11, 2025Management Practice Violations - No Licensed/Certified OperatorST6
July 11, 2025Monitoring Violations - Failure to Monitor for Non-Toxicity RequirementsST6
July 11, 2025Monitoring Violations - Improper Analysis or Lab ErrorST6
July 11, 2025Monitoring Violations - Invalid/Unrepresentative SampleST6
May 21, 2025Reporting Violations - Late Submittal of DMRsST6
January 21, 2025Reporting Violations - Late Submittal of DMRsST6
November 21, 2024Reporting Violations - Late Submittal of DMRsST6
June 21, 2024Reporting Violations - Late Submittal of DMRsST6
December 21, 2022Reporting Violations - Late Submittal of DMRsST6
January 21, 2022Reporting Violations - Late Submittal of DMRsST6
April 21, 2021Reporting Violations - Late Submittal of DMRsST6
January 21, 2021Reporting Violations - Late Submittal of DMRsST6
December 21, 2020Reporting Violations - Late Submittal of DMRsST6
May 21, 2020Reporting Violations - Late Submittal of DMRsST6
November 21, 2019Reporting Violations - Late Submittal of DMRsST6
April 21, 2019Reporting Violations - Late Submittal of DMRsST6
June 21, 2018Reporting Violations - Late Submittal of DMRsST6
January 21, 2018Reporting Violations - Late Submittal of DMRsST6
December 21, 2017Reporting Violations - Late Submittal of DMRsST6
November 21, 2017Reporting Violations - Late Submittal of DMRsST6
April 21, 2017Reporting Violations - Late Submittal of DMRsST6
January 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 October 14, 2026.

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES MIG580290, held by Michigan Department of Natural Resources for MDNR-SLEEPY HOLLOW STATE PARK in Laingsburg, MI, and discharging to the Little Maple River within HUC 040500050104. The permit is listed as administratively continued, with a discharger class of 22 and 2 pollutants under a numeric limit, 2 of which have an effluent exceedance.