Clean Water Act discharge permit · NPDES MI0020699
ST IGNACE WWTP, St. Ignace, MI: NPDES MI0020699 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 28Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
ST IGNACE WWTP, held by City of St. Ignace, holds NPDES permit MI0020699, which discharges to Lake Huron. EPA’s file records it issued February 6, 2018 and expiring October 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 | ST IGNACE WWTP |
|---|---|
| Permittee as filed | City of St. Ignace |
| NPDES ID | MI0020699 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | February 6, 2018 |
| Expiration date | October 1, 2020 |
| Issuing agency | State |
| Address | St. Ignace, MI 49781 |
| Receiving water | Lake Huron |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Rabbit Back Creek-Frontal Lake Huron (HUC 040700020307) |
| Program components on file | Biosolids, POTW |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
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
- 28Pollutants on file
- 28Under a numeric limit
- 26With 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 |
|---|---|---|---|---|---|
| Solids, suspended percent removal | 2 | 131 | 54 | April 30, 2026 | 560% over the limit |
| Solids, total suspended | 4 | 320 | 22 | July 31, 2015 | 67% over the limit |
| Coliform, fecal general | 2 | 168 | 14 | March 31, 2026 | 202% over the limit |
| Phosphorus, total [as P] | 4 | 158 | 8 | March 31, 2005 | 40% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 99 | 8 | April 30, 2026 | 120% over the limit |
| Copper, total [as Cu] | 2 | 45 | 7 | January 31, 2016 | 88% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 317 | 4 | July 31, 2004 | 56% over the limit |
| Oxygen, dissolved [DO] | 1 | 79 | 4 | February 28, 2022 | 78% over the limit |
| pH | 2 | 150 | 2 | October 31, 2004 | |
| Mercury, total [as Hg] | 6 | 186 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 153 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 151 | 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 | ||
| 2,4,6-Trichlorophenol | 4 | 0 | 0 | ||
| Cyanide [A] | 2 | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 31, 2025 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 31, 2024 | Reporting Violations - Late Submittal of DMRs | ST6 |
| July 25, 2023 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| October 31, 2022 | Reporting Violations - Late Submittal of DMRs | ST6 |
| October 31, 2019 | Reporting Violations - Late Submittal of DMRs | ST6 |
| August 25, 2017 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| February 1, 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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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 MI0020699 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.