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Sewage treatment plant, major discharger, Cadillac, Michigan. NPDES permit MI0020257, in force until Oct 1, 2027. Last 12 months: over a limit 5 times (last September 2026), 2 required values missing, 3 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| April 2026 | Coliform, fecal general, 7-day geometric mean | 670.88 | ≤ 400 #/100mL | 68% |
| April 2026 | Coliform, fecal general, monthly geometric mean | 222.99 | ≤ 200 #/100mL | 11% |
| June 2026 | BOD, carbonaceous [5 day, 20 C], daily maximum | 12.3 | ≤ 10 mg/L | 23% |
| August 2026 | BOD, carbonaceous [5 day, 20 C], daily maximum | 12.7 | ≤ 10 mg/L | 27% |
| September 2026 | BOD, carbonaceous [5 day, 20 C], daily maximum | 16.7 | ≤ 10 mg/L | 67% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | May–Nov | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Jan, Feb, Mar, Apr, Dec | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | Jun–Sep | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | 7-day average | ≤ 30 mg/L | Jun–Sep | 001 |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 530 lb/d | Jun–Sep | 001 |
| Solids, total suspended | monthly average | ≤ 800 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, total suspended | 7-day average | ≤ 800 lb/d | Jun–Sep | 001 |
| Solids, total suspended | 7-day average | ≤ 1200 lb/d | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .9 mg/L | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.6 mg/L | Oct, Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2 mg/L | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.8 mg/L | Oct, Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 24 lb/d | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 43 lb/d | Oct, Nov | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | ≤ 53 lb/d | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | 7-day average | = 75 lb/d | Oct, Nov | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .5 mg/L | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .65 mg/L | Apr | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Apr | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 13 lb/d | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 17 lb/d | Apr | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec | 001 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | Apr | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | monthly average | = 16 ug/L | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 001 |
| Arsenic, total [as As] | monthly average | = .43 lb/d | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (lb/d) | all year | 001 |
| Beryllium, total [as Be] | monthly average | = 4.1 ug/L | all year | 001 |
| Beryllium, total [as Be] | daily maximum | report only (ug/L) | all year | 001 |
| Beryllium, total [as Be] | monthly average | = .11 lb/d | all year | 001 |
| Beryllium, total [as Be] | daily maximum | report only (lb/d) | all year | 001 |
| Cadmium, total [as Cd] | monthly average | = 4.1 ug/L | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | = 12 ug/L | all year | 001 |
| Cadmium, total [as Cd] | monthly average | = .11 lb/d | all year | 001 |
| Cadmium, total [as Cd] | 7-day average | = .32 lb/d | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 001 |
| Silver, total [as Ag] | monthly average | = 1.4 ug/L | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (ug/L) | all year | 001 |
| Silver, total [as Ag] | monthly average | = .037 lb/d | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (lb/d) | all year | 001 |
| Cyanide [A] | monthly average | = 5.9 ug/L | all year | 001 |
| Cyanide [A] | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide [A] | monthly average | = .16 lb/d | all year | 001 |
| Cyanide [A] | daily maximum | report only (lb/d) | all year | 001 |
| Toxicity, choice of species | monthly average | = 1.1 tox chronic | all year | 001 |
| Toxicity, choice of species | value | report only (tox chronic) | all year | 001 |
| Bromomethane | daily maximum | report only (ug/L) | all year | 001 |
| Benzidine | monthly average | = .12 ug/L | all year | 001 |
| Benzidine | daily maximum | report only (ug/L) | all year | 001 |
| Benzidine | monthly average | = .0032 lb/d | all year | 001 |
| Benzidine | daily maximum | report only (lb/d) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Perfluorooctanesulfonate | daily maximum | report only (ng/L) | all year | 001 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | all year | 001 |
| Mercury, total [as Hg] | monthly average | report only (ng/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 001 |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year | 001 |
| Mercury, total [as Hg] | 12-month average | ≤ 2 ng/L | all year | 001 |
| Mercury, total [as Hg] | 12-month average | ≤ .000053 lb/d | all year | 001 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | 001 |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 17 mg/L | Apr, May | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 11 mg/L | Oct, Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 7 mg/L | Jun–Sep | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 23 mg/L | Jan, Feb, Mar, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 25 mg/L | Apr, May | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 17 mg/L | Oct, Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 10 mg/L | Jun–Sep | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 34 mg/L | Jan, Feb, Mar, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 450 lb/d | Apr, May | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 290 lb/d | Oct, Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 190 lb/d | Jun–Sep | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 610 lb/d | Jan, Feb, Mar, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 670 lb/d | Apr, May | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 450 lb/d | Oct, Nov | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 270 lb/d | Jun–Sep | 001 |
| BOD, carbonaceous [5 day, 20 C] | 7-day average | ≤ 910 lb/d | Jan, Feb, Mar, Dec | 001 |
| Solids, suspended percent removal | minimum | ≥ 85 % | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| Solids, suspended percent removal | daily minimum | report only (%) | Jan, Feb, Mar, Apr, May, Oct, Nov, Dec | 001 |
| TU Static 24 Hr Acute Pimephales promelas | daily maximum | report only (tox acute) | all year | 001 |
| Static 48 Hr Chronic Pimphales Promelas | monthly average | = 1.1 tox chronic | all year | 001 |
| Static 48 Hr Chronic Pimphales Promelas | value | report only (tox chronic) | all year | 001 |
| Solids, total | monthly minimum | report only (%) | all year | SLD |
| Solids, total | monthly average | report only (%) | all year | SLD |
| Solids, total | monthly maximum | report only (%) | all year | SLD |
| Arsenic, dry weight | monthly minimum | report only (mg/kg) | all year | SLD |
| Arsenic, dry weight | monthly average | report only (mg/kg) | all year | SLD |
| Arsenic, dry weight | monthly maximum | ≤ 75 mg/kg | all year | SLD |
| Selenium, dry weight | monthly minimum | report only (mg/kg) | all year | SLD |
| Selenium, dry weight | monthly average | report only (mg/kg) | all year | SLD |
| Selenium, dry weight | monthly maximum | ≤ 100 mg/kg | all year | SLD |
| Copper, dry weight | monthly minimum | report only (mg/kg) | all year | SLD |
| Copper, dry weight | monthly average | report only (mg/kg) | all year | SLD |
| Copper, dry weight | monthly maximum | ≤ 4300 mg/kg | all year | SLD |
| Cadmium, dry weight | monthly minimum | report only (mg/kg) | all year | SLD |
| Cadmium, dry weight | monthly average | report only (mg/kg) | all year | SLD |
| Cadmium, dry weight | monthly maximum | ≤ 85 mg/kg | all year | SLD |
| Nitrogen, total Kjeldahl | monthly minimum | report only (mg/kg) | all year | SLD |
| Nitrogen, total Kjeldahl | monthly average | report only (mg/kg) | all year | SLD |
| Nitrogen, total Kjeldahl | monthly maximum | report only (mg/kg) | all year | SLD |
| Molybdenum, sludge, total, dry weight [as Mo] | monthly minimum | report only (mg/kg) | all year | SLD |
| Molybdenum, sludge, total, dry weight [as Mo] | monthly average | report only (mg/kg) | all year | SLD |
| Molybdenum, sludge, total, dry weight [as Mo] | monthly maximum | ≤ 75 mg/kg | all year | SLD |
| Zinc, sludge, total, dry weight [as Zn] | monthly minimum | report only (mg/kg) | all year | SLD |
| Zinc, sludge, total, dry weight [as Zn] | monthly average | report only (mg/kg) | all year | SLD |
| Zinc, sludge, total, dry weight [as Zn] | monthly maximum | ≤ 7500 mg/kg | all year | SLD |
| Lead, sludge, total, dry weight [as Pb] | monthly minimum | report only (mg/kg) | all year | SLD |
| Lead, sludge, total, dry weight [as Pb] | monthly average | report only (mg/kg) | all year | SLD |
| Lead, sludge, total, dry weight [as Pb] | monthly maximum | ≤ 840 mg/kg | all year | SLD |
| Nickel, sludge, total, dry weight [as Ni] | monthly minimum | report only (mg/kg) | all year | SLD |
| Nickel, sludge, total, dry weight [as Ni] | monthly average | report only (mg/kg) | all year | SLD |
| Nickel, sludge, total, dry weight [as Ni] | monthly maximum | ≤ 420 mg/kg | all year | SLD |
| Nitrogen, sludge, total, dry weight [as N] | monthly minimum | report only (mg/kg) | all year | SLD |
| Nitrogen, sludge, total, dry weight [as N] | monthly average | report only (mg/kg) | all year | SLD |
| Nitrogen, sludge, total, dry weight [as N] | monthly maximum | report only (mg/kg) | all year | SLD |
| Mercury, sludge, total, dry weight [as Hg] | monthly minimum | report only (mg/kg) | all year | SLD |
| Mercury, sludge, total, dry weight [as Hg] | monthly average | report only (mg/kg) | all year | SLD |
| Mercury, sludge, total, dry weight [as Hg] | monthly maximum | ≤ 57 mg/kg | all year | SLD |
| Potassium, sludge, total, dry weight [as K] | monthly minimum | report only (mg/kg) | all year | SLD |
| Potassium, sludge, total, dry weight [as K] | monthly average | report only (mg/kg) | all year | SLD |
| Potassium, sludge, total, dry weight [as K] | monthly maximum | report only (mg/kg) | all year | SLD |
| Phosphorus, sludge, total, dry weight [as P] | monthly minimum | report only (mg/kg) | all year | SLD |
| Phosphorus, sludge, total, dry weight [as P] | monthly average | report only (mg/kg) | all year | SLD |
| Phosphorus, sludge, total, dry weight [as P] | monthly maximum | report only (mg/kg) | all year | SLD |
Cited limits by parameter: Michigan's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/MI0020257 · MCP: https://passage-data.com/mcp