Clean Water Act discharge permit · NPDES MIG580313
MDNR-PORCUPINE MOUNTAINS WILDERNESS STATE PARK, Ontonagon, MI: NPDES MIG580313 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 22Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
MDNR-PORCUPINE MOUNTAINS WILDERNESS STATE PARK, held by Michigan Department of Natural Resources, holds NPDES permit MIG580313, which discharges to Lake Superior. EPA’s file records it issued September 12, 2023 and expiring April 1, 2024. 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 | MDNR-PORCUPINE MOUNTAINS WILDERNESS STATE PARK |
|---|---|
| Permittee as filed | Michigan Department of Natural Resources |
| NPDES ID | MIG580313 |
| 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 | September 12, 2023 |
| Expiration date | April 1, 2024 |
| Issuing agency | State |
| Address | Ontonagon, MI 49953 |
| Receiving water | Lake Superior |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Union River-Frontal Lake Superior (HUC 040201010105) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 22Pollutants on file
- 22Under a numeric limit
- 22With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 69 | 5 | April 30, 2025 | 123% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 68 | 4 | May 31, 2026 | 30% over the limit |
| Coliform, fecal general | 2 | 65 | 1 | October 31, 2024 | 14% over the limit |
| pH | 2 | 64 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 64 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 48 | 0 | ||
| Phosphorus, total [as P] | 2 | 48 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 32 | 0 | ||
| Solids, total | 3 | 9 | 0 | ||
| Arsenic, dry weight | 3 | 9 | 0 | ||
| Selenium, dry weight | 3 | 9 | 0 | ||
| Copper, dry weight | 3 | 9 | 0 | ||
| Cadmium, dry weight | 3 | 9 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 9 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 9 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 9 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 9 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 9 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 9 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 9 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 9 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 9 | 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
- 22Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 21, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 21, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| April 21, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 31, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| April 21, 2020 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 31, 2019 | Reporting Violations - Late Submittal of DMRs | ST6 |
| July 21, 2019 | Reporting Violations - Late Submittal of DMRs | ST6 |
| January 21, 2019 | Reporting Violations - Late Submittal of DMRs | ST6 |
| December 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| November 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 31, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| July 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| June 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| April 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| January 21, 2018 | Reporting Violations - Late Submittal of DMRs | ST6 |
| December 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| July 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| June 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| May 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| April 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
| January 21, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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 MIG580313 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.