Clean Water Act discharge permit · NPDES MIG570202

HURON RIVER MHC ESTATES LLC, S Rockwood, MI: NPDES MIG570202 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
24Pollutants under a numeric limit
9Pollutants with an effluent exceedance

HURON RIVER MHC ESTATES LLC, held by Huron River Mobile Home Park & Marina, holds NPDES permit MIG570202. EPA’s file records it issued January 26, 2018 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 filed	HURON RIVER MHC ESTATES LLC
Permittee as filed	Huron River Mobile Home Park & Marina
NPDES ID	MIG570202
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	January 26, 2018
Expiration date	April 1, 2020
Issuing agency	State
Address	S Rockwood, MI 48179
Receiving water impaired	303(D) Listed
Subwatershed	Bancroft Noles Drain-Huron River (HUC 040900050407)
NAICS	531190 – Lessors of Other Real Estate Property
SIC	4493 – Marinas

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

26Pollutants on file
24Under a numeric limit
24With a violation of any kind
9With an effluent exceedance

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 measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
pH	2	101	69	April 30, 2017
Chlorine, total residual	1	75	59	August 31, 2020	60,689% over the limit
Phosphorus, total [as P]	2	108	16	June 30, 2022	108% over the limit
Coliform, fecal general	2	48	16	October 31, 2015	11,546% over the limit
Oxygen, dissolved [DO]	1	29	13	February 28, 2013	73% over the limit
Solids, suspended percent removal	0	86	10	September 30, 2015	222% over the limit
BOD, 5-day, percent removal	0	85	9	September 30, 2015	246% over the limit
BOD, 5-day, 20 deg. C	4	192	8	December 31, 2020	433% over the limit
Solids, total suspended	4	190	6	December 31, 2020	38% over the limit
Flow, in conduit or thru treatment plant	2	32	0
Solids, total	3	15	0
Arsenic, dry weight	3	15	0
Selenium, dry weight	3	15	0
Copper, dry weight	3	15	0
Cadmium, dry weight	3	15	0
Nitrogen, total Kjeldahl	3	15	0
Molybdenum, sludge, total, dry weight [as Mo]	3	15	0
Zinc, sludge, total, dry weight [as Zn]	3	15	0
Lead, sludge, total, dry weight [as Pb]	3	15	0
Nickel, sludge, total, dry weight [as Ni]	3	15	0
Nitrogen, sludge, total, dry weight [as N]	3	15	0
Mercury, sludge, total, dry weight [as Hg]	3	15	0
Potassium, sludge, total, dry weight [as K]	3	15	0
Phosphorus, sludge, total, dry weight [as P]	3	15	0
Nitrogen, ammonia total [as N]	2	0	0
Outfall observation,visual, y/n response	1	0	0

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

15Single-event violations

Date	What EPA recorded	Agency
August 30, 2024	Monitoring Violations - Invalid/Unrepresentative Sample	ST6
June 7, 2024	Management Practice Violations - Failure to Maintain Records	ST6
June 2, 2024	Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements	ST6
March 28, 2024	Management Practice Violations - Failure to Maintain Records	ST6
March 24, 2024	Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements	ST6
December 15, 2023	Management Practice Violations - Failure to Maintain Records	ST6
December 10, 2023	Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements	ST6
September 21, 2023	Management Practice Violations - Failure to Maintain Records	ST6
September 17, 2023	Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements	ST6
October 31, 2020	Reporting Violations - Late Submittal of DMRs	ST6
October 31, 2019	Reporting Violations - Late Submittal of DMRs	ST6
May 21, 2019	Reporting Violations - Late Submittal of DMRs	ST6
October 31, 2018	Reporting Violations - Late Submittal of DMRs	ST6
August 23, 2017	Monitoring Violations - Improper Analysis or Lab Error	ST6
August 23, 2017	Management Practice Violations - Improper Operation and Maintenance	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.

This public-records page covers Clean Water Act discharge permit NPDES MIG570202, held by HURON RIVER MHC ESTATES LLC in S Rockwood, MI, with its status as loaded on October 14, 2026. The figures listed are 24 for the discharger class, 9 pollutants under a numeric limit, and 9 pollutants with an effluent exceedance, within watershed 040900050407.