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 (September 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) |
Cited to the EPA ICIS-NPDES permit file (ECHO 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 | Largest exceedance, as filed |
|---|---|---|---|---|---|
| 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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MI0005100.
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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 September 14, 2026.