Clean Water Act discharge permit · NPDES MI0005100

USDI-HAMMOND BAY BIOLOGICAL STATION, Millersburg, MI: NPDES MI0005100 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
5Pollutants under a numeric limit
1Pollutants with an effluent exceedance

USDI-HAMMOND BAY BIOLOGICAL STATION, held by US Dept. of Interior, US Geological Survey, Hammond Bay Biological Station, holds NPDES permit MI0005100, which discharges to Lake Huron. EPA’s file records it issued March 27, 2018 and expiring October 1, 2021. 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	USDI-HAMMOND BAY BIOLOGICAL STATION
Permittee as filed	US Dept. of Interior, US Geological Survey, Hammond Bay Biological Station
NPDES ID	MI0005100
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Federal facility
Issued	March 27, 2018
Expiration date	October 1, 2021
Issuing agency	State
Address	Millersburg, MI 49759
Receiving water	Lake Huron
Receiving water impaired	303(D) Listed
Subwatershed	Schmidt Creek-Frontal Lake Huron (HUC 040700030301)
NAICS	541715 – Research and Development in the Physical, Engineering and Life Sciences (exc Nanotech and Biotech)
SIC	8733 – Noncommercial Research Organizations

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

7Pollutants on file
5Under a numeric limit
7With a violation of any kind
1With 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
pH	4	110	4	June 30, 2026
Duration of discharge	0	159	0
Flow, in conduit or thru treatment plant	4	126	0
Chlorine, total residual	2	53	0
Outfall observation,visual, y/n response	2	53	0
3-TRIFLUOROMETHYL-4-NPNL [TFM]	0	48	0
Chlorination duration	2	38	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

5Single-event violations

Date	What EPA recorded	Agency
November 21, 2025	Reporting Violations - Late Submittal of DMRs	ST6
August 2, 2023	Management Practice Violations - No Licensed/Certified Operator	ST6
July 31, 2019	Monitoring Violations - Invalid/Unrepresentative Sample	ST6
July 31, 2019	Management Practice Violations - Failure to Maintain Records	ST6
January 21, 2017	Reporting Violations - Late Submittal of DMRs	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.

Watch this permit

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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 MI0005100 there.

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 MI0005100, held by USDI-HAMMOND BAY BIOLOGICAL STATION in Millersburg, MI, which discharges to Lake Huron and is listed as administratively continued with a minor discharger class of 5. The page lists 1 pollutant under a numeric limit and 1 pollutant with an effluent exceedance, and the permit's issue date of March 27, 2018 and expiration date of October 1, 2021 are as recorded when the file was loaded on October 14, 2026.