Clean Water Act discharge permit · NPDES MI0044423
ISHPEMING AREA WWTP, Ishpeming, MI: NPDES MI0044423 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 32Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
ISHPEMING AREA WWTP, held by Ishpeming Area Joint Wastewater Authority Board, holds NPDES permit MI0044423, which discharges to Carp Creek. EPA’s file records it issued February 21, 2019 and expiring October 1, 2022.
ISHPEMING AREA WWTP, Ishpeming, Michigan: Individual permit MI0044423, held by Ishpeming Area Joint Wastewater Authority Board; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued February 21, 2019, term to October 1, 2022, by State; discharges to Carp Creek; Sewage Treatment Facilities.
- Mercury, total [as Hg]: 6 limits, 114 violations of any kind, 15 effluent exceedances, latest April 30, 2022, largest 129% over the limit.
- Solids, total suspended: 8 limits, 22 violations of any kind, 14 effluent exceedances, latest April 30, 2026, largest 295% over the limit.
- Solids, suspended percent removal: 2 limits, 8 violations of any kind, 6 effluent exceedances, latest April 30, 2026, largest 173% over the limit.
- Phosphorus, total [as P]: 5 limits, 8 violations of any kind, 3 effluent exceedances, latest March 31, 2024, largest 500% over the limit.
- pH: 2 limits, 7 violations of any kind, 3 effluent exceedances, latest November 30, 2023.
- Chlorine, total residual: 1 limit, 5 violations of any kind, 2 effluent exceedances, latest September 30, 2024, largest 558% over the limit.
- Toxicity, choice of species: 2 limits, 3 violations of any kind, 2 effluent exceedances, latest May 31, 2024, largest 99,999% over the limit.
- Toxicity [chronic], Ceriodaphnia dubia: 0 limits, 3 violations of any kind, 2 effluent exceedances, latest June 30, 2006, largest 379% over the limit.
- Oxygen, dissolved [DO]: 3 limits, 18 violations of any kind, 1 effluent exceedance, latest August 31, 2022, largest 1% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 16 limits, 48 violations of any kind, 0 effluent exceedances.
- Nitrogen, ammonia total [as N]: 12 limits, 24 violations of any kind, 0 effluent exceedances.
- BOD, carb-5 day, 20 deg C, percent removal: 2 limits, 9 violations of any kind, 0 effluent exceedances.
- Nitrogen, total Kjeldahl: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Coliform, fecal general: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Solids, total: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Nitrogen, sludge, total, dry weight [as N]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Potassium, sludge, total, dry weight [as K]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Phosphorus, sludge, total, dry weight [as P]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- Toxicity [acute], Ceriodaphnia dubia: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Di[2-ethylhexyl] phthalate [DEHP]: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Copper, total [as Cu]: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- Static 48 Hr Chronic Pimphales Promelas: 2 limits, 0 violations of any kind, 0 effluent exceedances.
- TU Static 24 Hr Acute Pimephales promelas: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- September 4, 2026: Letter of Violation/ Warning Letter (State).
- October 31, 2024: Reporting Violations - Late Submittal of DMRs (ST6).
Michigan holds 200 Publicly owned treatment works coverages of this permit type in EPA’s file; 121 were issued before MI0044423.
Coverages issued nearest MI0044423
- December 21, 2018: ONAWAY WWTP, Onaway, MI0055522, held by City of Onaway
- December 28, 2018: ESCANABA WWTP, Escanaba, MI0025381, held by City of Escanaba
- December 28, 2018: DENTON TWP WWTP, Houghton Lake, MI0053317, held by Denton Township
- January 9, 2019: DELHI TWP WWTP, Holt, MI0022781, held by Delhi Charter Township
- January 24, 2019: GEORGE W KUHN DR DIST CSO RTB, Madison Heights, MI0026115, held by Oakland County Water Resources Commissioner
- February 22, 2019: BIG RAPIDS WWTP, Big Rapids, MI0022381, held by City of Big Rapids
- February 26, 2019: MARQUETTE WWTP, Marquette, MI0023531, held by City of Marquette
- February 28, 2019: OTTER LAKE WWTP, Otter Lake, MI0056979, held by Village of Otter Lake
- March 22, 2019: SAGANING WWTP, Standish, MI0058582, held by Saginaw Chippewa Indian Tribe of Michigan
- March 25, 2019: PINCONNING WWTP, Pinconning, MI0020711, held by City of Pinconning
ISHPEMING AREA WWTP among its neighbors
EPA’s permit file holds 5 discharge permits in the Deer Lake-Carp Creek subwatershed (HUC 040201050101), MI0044423 among them. Its county holds 15, 5 of them major permits; MI0044423 is a major permit.
Other permits in the Deer Lake-Carp Creek subwatershed (HUC 040201050101)
- CLEVELAND-CLIFFS-SALISBURY, Ishpeming: MIS210039, minor permit, discharging to Ely Creek, permit term to March 31, 2027
- ISHPEMING YARD, Ishpeming: MIS310818, minor permit, permit term to April 1, 2028
- MICH ANG-ISHPEMING-OMS 16, Ishpeming: MIS310163, minor permit, permit term to April 1, 2023
- NEGAUNEE/ISHPEMING WTP, Ishpeming: MIG640261, minor permit, discharging to Carp River, permit term to April 1, 2020
Identity
| Facility as filed | ISHPEMING AREA WWTP |
|---|---|
| Permittee as filed | Ishpeming Area Joint Wastewater Authority Board |
| NPDES ID | MI0044423 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | February 21, 2019 |
| Expiration date | October 1, 2022 |
| Issuing agency | State |
| Address | Ishpeming, MI 49849 |
| Receiving water | Carp Creek |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Deer Lake-Carp Creek (HUC 040201050101) |
| Program components on file | Biosolids, POTW |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler MID153543491 |
Effluent limits and exceedances
- 33Pollutants on file
- 32Under a numeric limit
- 29With 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 |
|---|---|---|---|---|---|
| Mercury, total [as Hg] | 6 | 114 | 15 | April 30, 2022 | 129% over the limit |
| Solids, total suspended | 8 | 22 | 14 | April 30, 2026 | 295% over the limit |
| Solids, suspended percent removal | 2 | 8 | 6 | April 30, 2026 | 173% over the limit |
| Phosphorus, total [as P] | 5 | 8 | 3 | March 31, 2024 | 500% over the limit |
| pH | 2 | 7 | 3 | November 30, 2023 | |
| Chlorine, total residual | 1 | 5 | 2 | September 30, 2024 | 558% over the limit |
| Toxicity, choice of species | 2 | 3 | 2 | May 31, 2024 | 99,999% over the limit |
| Toxicity [chronic], Ceriodaphnia dubia | 0 | 3 | 2 | June 30, 2006 | 379% over the limit |
| Oxygen, dissolved [DO] | 3 | 18 | 1 | August 31, 2022 | 1% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 16 | 48 | 0 | ||
| Nitrogen, ammonia total [as N] | 12 | 24 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 9 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Coliform, fecal general | 2 | 4 | 0 | ||
| Solids, total | 3 | 3 | 0 | ||
| Arsenic, dry weight | 3 | 3 | 0 | ||
| Selenium, dry weight | 3 | 3 | 0 | ||
| Copper, dry weight | 3 | 3 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 3 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 3 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 3 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 3 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 4 | 0 | 0 | ||
| Copper, total [as Cu] | 2 | 0 | 0 | ||
| Static 48 Hr Chronic Pimphales Promelas | 2 | 0 | 0 | ||
| TU Static 24 Hr Acute Pimephales promelas | 1 | 0 | 0 |
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 31, 2024 | Reporting Violations - Late Submittal of DMRs | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES MI0044423.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| September 4, 2026 | Letter of Violation/ Warning Letter | State |
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.