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Sewerage Systems, Wilmington, Ohio. NPDES permit OH0137634, in force until Jun 30, 2027. Last 12 months: no values over a limit, 2 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 001 |
| pH | daily minimum | report only (SU) | all year | 001 |
| pH | daily maximum | report only (SU) | all year | 001 |
| Residue, tot fltrble [dried at 105 C] | monthly average | report only (mg/L) | all year | 001 |
| Residue, tot fltrble [dried at 105 C] | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | weekly maximum | report only (mg/L) | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | report only (mg/L) | May–Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Turbidity [severity] | monthly average | report only (severity) | all year | 001 |
| Turbidity [severity] | daily maximum | report only (severity) | all year | 001 |
| E. coli, MTEC-MF | monthly geometric mean | report only (MPN/100mL) | May–Oct | 001 |
| E. coli, MTEC-MF | weekly geometric mean | report only (MPN/100mL) | May–Oct | 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 |
| Chlorine, total residual | daily maximum | report only (mg/L) | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | report only (mg/L) | all year | 001 |
| Sludge waste from secondary clarifiers | monthly average | report only (gal) | Dec | 588 |
| Sludge waste from secondary clarifiers | daily maximum | report only (gal) | Dec | 588 |
| pH | daily minimum | report only (SU) | all year | 601 |
| pH | daily maximum | report only (SU) | all year | 601 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 601 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 601 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 601 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 601 |
| Streamflow | monthly average | report only (cfs) | all year | 602 |
| Streamflow | daily maximum | report only (cfs) | all year | 602 |
| pH | daily minimum | report only (SU) | all year | 602 |
| pH | daily maximum | report only (SU) | all year | 602 |
| Solids, total suspended | monthly average | ≤ 12 mg/L | all year | 602 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | Jun, Dec | 602 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | Jun, Dec | 602 |
| Nitrogen, inorganic total | monthly average | report only (mg/L) | all year | 602 |
| Nitrogen, inorganic total | daily maximum | report only (mg/L) | all year | 602 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 602 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 602 |
| E. coli, MTEC-MF | daily maximum | ≤ 298 MPN/100mL | all year | 602 |
| Application rate area sprayed | monthly average | report only (in/d) | all year | 602 |
| Application rate area sprayed | daily maximum | report only (in/d) | all year | 602 |
| Chlorine, total residual | daily maximum | ≤ 10 mg/L | all year | 602 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 602 |
| Streamflow | monthly average | report only (cfs) | all year | 801 |
| Streamflow | daily maximum | report only (cfs) | all year | 801 |
Cited limits by parameter: Ohio'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/OH0137634 · MCP: https://passage-data.com/mcp