NPDES permit MI0021679 · Major POTW · administratively continued, expires 2025-10-01 · EPA's file as of 2026-09-19
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This permit expired on 2025-10-01 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.
Last period with anything received: 2026-07-31. Most often over: Toxicity, choice of species (1).
Reports are due about 21 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).
| Outfall | Parameter | Statistic | Limit | Months |
|---|---|---|---|---|
| 001 | Oxygen, dissolved [DO] | DAILY MN | >= 4 mg/L | Jan, Feb, Mar, Apr, Dec |
| 001 | Oxygen, dissolved [DO] | DAILY MN | >= 6 mg/L | Oct, Nov |
| 001 | Oxygen, dissolved [DO] | DAILY MN | >= 7 mg/L | May, Jun, Jul, Aug, Sep |
| 001 | pH | DAILY MN | >= 6.5 SU | all year |
| 001 | pH | DAILY MX | <= 9 SU | all year |
| 001 | Solids, total suspended | MO AVG | <= 20 mg/L | May, Jun, Jul, Aug, Sep |
| 001 | Solids, total suspended | MO AVG | <= 30 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| 001 | Solids, total suspended | 7 DA AVG | <= 30 mg/L | May, Jun, Jul, Aug, Sep |
| 001 | Solids, total suspended | 7 DA AVG | <= 45 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| 001 | Solids, total suspended | MO AVG | <= 350 lb/d | May, Jun, Jul, Aug, Sep |
| 001 | Solids, total suspended | MO AVG | <= 530 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| 001 | Solids, total suspended | 7 DA AVG | <= 530 lb/d | May, Jun, Jul, Aug, Sep |
| 001 | Solids, total suspended | 7 DA AVG | <= 790 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 7.9 mg/L | Jan, Feb, Mar, Dec |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 7.7 mg/L | Apr |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= .5 mg/L | May, Jun, Jul, Aug, Sep |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 4.3 mg/L | Oct, Nov |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | report only | Jan, Feb, Mar, Dec |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | report only | Apr |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 2 mg/L | May, Jun, Jul, Aug, Sep |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | <= 5.1 mg/L | Oct, Nov |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 140 lb/d | Jan, Feb, Mar, Dec |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 130 lb/d | Apr |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 8.8 lb/d | May, Jun, Jul, Aug, Sep |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 75 lb/d | Oct, Nov |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | report only | Jan, Feb, Mar, Dec |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | report only | Apr |
| 001 | Nitrogen, ammonia total [as N] | 7 DA AVG | <= 35 lb/d | May, Jun, Jul, Aug, Sep |
| 001 | Nitrogen, ammonia total [as N] | 7 DA AVG | <= 89 lb/d | Oct, Nov |
| 001 | Phosphorus, total [as P] | MO AVG | <= .76 mg/L | May, Jun, Jul, Aug, Sep |
| 001 | Phosphorus, total [as P] | MO AVG | <= 1 mg/L | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| 001 | Phosphorus, total [as P] | DAILY MX | report only | May, Jun, Jul, Aug, Sep |
| 001 | Phosphorus, total [as P] | DAILY MX | report only | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| 001 | Phosphorus, total [as P] | MO AVG | <= 13 lb/d | May, Jun, Jul, Aug, Sep |
| 001 | Phosphorus, total [as P] | MO AVG | <= 18 lb/d | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| 001 | Phosphorus, total [as P] | DAILY MX | report only | May, Jun, Jul, Aug, Sep |
| 001 | Phosphorus, total [as P] | DAILY MX | report only | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| 001 | Selenium, total [as Se] | MO AVG | = 5.9 ug/L | all year |
| 001 | Selenium, total [as Se] | DAILY MX | report only | all year |
| 001 | Selenium, total [as Se] | MO AVG | = .1 lb/d | all year |
| 001 | Selenium, total [as Se] | DAILY MX | report only | all year |
| 001 | Cyanide [A] | MO AVG | <= 6.1 ug/L | all year |
| 001 | Cyanide [A] | DAILY MX | report only | all year |
| 001 | Cyanide [A] | MO AVG | <= .11 lb/d | all year |
| 001 | Cyanide [A] | DAILY MX | report only | all year |
| 001 | Toxicity, choice of species | MO AVG | <= 1.2 tox chronic | all year |
| 001 | Toxicity, choice of species | VALUE | report only | all year |
| 001 | Flow, in conduit or thru treatment plant | MO AVG | report only | all year |
| 001 | Flow, in conduit or thru treatment plant | DAILY MX | report only | all year |
| 001 | Chlorine, total residual | DAILY MX | <= 38 ug/L | all year |
| 001 | Toxicity [acute], Ceriodaphnia dubia | DAILY MX | = 1 tox acute | all year |
| 001 | Mercury, total [as Hg] | MO AVG | report only | all year |
| 001 | Mercury, total [as Hg] | DAILY MX | report only | all year |
| 001 | Mercury, total [as Hg] | MO AVG | report only | all year |
| 001 | Mercury, total [as Hg] | DAILY MX | report only | all year |
| 001 | Coliform, fecal general | MO GEOMN | <= 200 #/100mL | all year |
| 001 | Coliform, fecal general | 7 DA GEO | <= 400 #/100mL | all year |
| 001 | BOD, carbonaceous [5 day, 20 C] | MO AVG | <= 4 mg/L | May, Jun, Jul, Aug, Sep |
| 001 | BOD, carbonaceous [5 day, 20 C] | MO AVG | <= 17 mg/L | Oct, Nov |
| 001 | BOD, carbonaceous [5 day, 20 C] | MO AVG | <= 25 mg/L | Jan, Feb, Mar, Apr, Dec |
| 001 | BOD, carbonaceous [5 day, 20 C] | DAILY MX | <= 10 mg/L | May, Jun, Jul, Aug, Sep |
| 001 | BOD, carbonaceous [5 day, 20 C] | DAILY MX | <= 25 mg/L | Oct, Nov |
| 001 | BOD, carbonaceous [5 day, 20 C] | 7 DA AVG | <= 40 mg/L | Jan, Feb, Mar, Apr, Dec |
| 001 | BOD, carbonaceous [5 day, 20 C] | MO AVG | <= 70 lb/d | May, Jun, Jul, Aug, Sep |
| 001 | BOD, carbonaceous [5 day, 20 C] | MO AVG | <= 300 lb/d | Oct, Nov |
| 001 | BOD, carbonaceous [5 day, 20 C] | MO AVG | <= 440 lb/d | Jan, Feb, Mar, Apr, Dec |
| 001 | BOD, carbonaceous [5 day, 20 C] | 7 DA AVG | <= 180 lb/d | May, Jun, Jul, Aug, Sep |
| 001 | BOD, carbonaceous [5 day, 20 C] | 7 DA AVG | <= 440 lb/d | Oct, Nov |
| 001 | BOD, carbonaceous [5 day, 20 C] | 7 DA AVG | <= 700 lb/d | Jan, Feb, Mar, Apr, Dec |
| 001 | BOD, carb-5 day, 20 deg C, percent removal | MINIMUM | >= 85 % | Jan, Feb, Mar, Apr, Dec |
| 001 | BOD, carb-5 day, 20 deg C, percent removal | DAILY MN | report only | Jan, Feb, Mar, Apr, Dec |
| 001 | Solids, suspended percent removal | MINIMUM | >= 85 % | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| 001 | Solids, suspended percent removal | DAILY MN | report only | Jan, Feb, Mar, Apr, Oct, Nov, Dec |
| 001 | TU Static 24 Hr Acute Pimephales promelas | DAILY MX | = 1 tox acute | all year |
| 001 | Static 48 Hr Chronic Pimphales Promelas | MO AVG | = 1.2 tox chronic | all year |
| 001 | Static 48 Hr Chronic Pimphales Promelas | VALUE | report only | all year |
| SLD | Solids, total | MO MIN | report only | all year |
| SLD | Solids, total | MO AVG | report only | all year |
| SLD | Solids, total | MO MAX | report only | all year |
| SLD | Arsenic, dry weight | MO MIN | report only | all year |
| SLD | Arsenic, dry weight | MO AVG | report only | all year |
| SLD | Arsenic, dry weight | MO MAX | <= 75 mg/kg | all year |
| SLD | Selenium, dry weight | MO MIN | report only | all year |
| SLD | Selenium, dry weight | MO AVG | report only | all year |
| SLD | Selenium, dry weight | MO MAX | <= 100 mg/kg | all year |
| SLD | Copper, dry weight | MO MIN | report only | all year |
| SLD | Copper, dry weight | MO AVG | report only | all year |
| SLD | Copper, dry weight | MO MAX | <= 4300 mg/kg | all year |
| SLD | Cadmium, dry weight | MO MIN | report only | all year |
| SLD | Cadmium, dry weight | MO AVG | report only | all year |
| SLD | Cadmium, dry weight | MO MAX | <= 85 mg/kg | all year |
| SLD | Nitrogen, total Kjeldahl | MO MIN | report only | all year |
| SLD | Nitrogen, total Kjeldahl | MO AVG | report only | all year |
| SLD | Nitrogen, total Kjeldahl | MO MAX | report only | all year |
| SLD | Molybdenum, sludge, total, dry weight [as Mo] | MO MIN | report only | all year |
| SLD | Molybdenum, sludge, total, dry weight [as Mo] | MO AVG | report only | all year |
| SLD | Molybdenum, sludge, total, dry weight [as Mo] | MO MAX | <= 75 mg/kg | all year |
| SLD | Zinc, sludge, total, dry weight [as Zn] | MO MIN | report only | all year |
| SLD | Zinc, sludge, total, dry weight [as Zn] | MO AVG | report only | all year |
| SLD | Zinc, sludge, total, dry weight [as Zn] | MO MAX | <= 7500 mg/kg | all year |
| SLD | Lead, sludge, total, dry weight [as Pb] | MO MIN | report only | all year |
| SLD | Lead, sludge, total, dry weight [as Pb] | MO AVG | report only | all year |
| SLD | Lead, sludge, total, dry weight [as Pb] | MO MAX | <= 840 mg/kg | all year |
| SLD | Nickel, sludge, total, dry weight [as Ni] | MO MIN | report only | all year |
| SLD | Nickel, sludge, total, dry weight [as Ni] | MO AVG | report only | all year |
| SLD | Nickel, sludge, total, dry weight [as Ni] | MO MAX | <= 420 mg/kg | all year |
| SLD | Nitrogen, sludge, total, dry weight [as N] | MO MIN | report only | all year |
| SLD | Nitrogen, sludge, total, dry weight [as N] | MO AVG | report only | all year |
| SLD | Nitrogen, sludge, total, dry weight [as N] | MO MAX | report only | all year |
| SLD | Mercury, sludge, total, dry weight [as Hg] | MO MIN | report only | all year |
| SLD | Mercury, sludge, total, dry weight [as Hg] | MO AVG | report only | all year |
| SLD | Mercury, sludge, total, dry weight [as Hg] | MO MAX | <= 57 mg/kg | all year |
| SLD | Potassium, sludge, total, dry weight [as K] | MO MIN | report only | all year |
| SLD | Potassium, sludge, total, dry weight [as K] | MO AVG | report only | all year |
| SLD | Potassium, sludge, total, dry weight [as K] | MO MAX | report only | all year |
| SLD | Phosphorus, sludge, total, dry weight [as P] | MO MIN | report only | all year |
| SLD | Phosphorus, sludge, total, dry weight [as P] | MO AVG | report only | all year |
| SLD | Phosphorus, sludge, total, dry weight [as P] | MO MAX | report only | all year |
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