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Sewage treatment plant, Crystal, Michigan. NPDES permit MI0057088 expired Oct 1, 2018; its limits still apply. Last 12 months: over a limit 6 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| June 2026 | 001 | Coliform, fecal general, 7-day geometric mean | 1120 | ≤ 400 #/100mL | 180% |
| July 2026 | 001 | Coliform, fecal general, 7-day geometric mean | 4840 | ≤ 400 #/100mL | 1110% |
| July 2026 | 001 | Coliform, fecal general, monthly geometric mean | 4840 | ≤ 200 #/100mL | 2320% |
| July 2026 | EQ1 | Chloride [as Cl], daily maximum | 578 | ≤ 500 mg/L | 16% |
| August 2026 | EQ1 | Chloride [as Cl], daily maximum | 634 | ≤ 500 mg/L | 27% |
| September 2026 | 001 | Coliform, fecal general, 7-day geometric mean | < 2419.7 | ≤ 400 #/100mL | 505% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 4 mg/L | May–Oct | 001 |
| pH | daily minimum | ≥ 6.5 SU | May–Oct | 001 |
| pH | daily maximum | ≤ 9 SU | May–Oct | 001 |
| Solids, total suspended | monthly average | ≤ 10 mg/L | May–Oct | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .5 mg/L | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun–Sep | 001 |
| Phosphorus, total [as P] | monthly average | ≤ .5 mg/L | May–Oct | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | May–Oct | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Jun–Sep | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | May–Oct | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | May–Oct | 001 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | May–Oct | 001 |
| Coliform, fecal general | 7-day geometric mean | ≤ 400 #/100mL | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 4 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | May–Oct | 001 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | May–Sep | EQ1 |
| BOD, 5-day, 20 deg. C | monthly maximum | report only (mg/L) | May–Sep | EQ1 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | May–Sep | EQ1 |
| Nitrogen, nitrite total [as N] | daily maximum | ≤ .5 mg/L | May–Sep | EQ1 |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | May–Sep | EQ1 |
| Nitrogen, inorganic total | daily maximum | ≤ 15 mg/L | May–Sep | EQ1 |
| Chloride [as Cl] | daily maximum | ≤ 500 mg/L | May–Sep | EQ1 |
| Nitrogen, ammonia [NH3-N] | daily maximum | report only (mg/L) | May–Sep | EQ1 |
| Phosphorus, Total | daily maximum | ≤ 5 mg/L | May–Sep | EQ1 |
| Flow, total | annual maximum | ≤ 35200000 gal | Dec | EQ1 |
| pH, maximum | daily maximum | report only (SU) | May–Sep | EQ1 |
| 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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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MI0057088 · MCP: https://passage-data.com/mcp