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Sewerage Systems, Conneaut, Ohio. NPDES permit OH0136824, in force until Oct 31, 2027. Last 12 months: over a limit 8 times (last August 2026), 1 of 23 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Nitrogen, ammonia total [as N], monthly average | 6.64 | ≤ 3 mg/L | 121% |
| December 2025 | Nitrogen, ammonia total [as N], weekly maximum | 7.55 | ≤ 4.5 mg/L | 68% |
| December 2025 | pH, daily maximum | 9.1 | ≤ 9 SU | — |
| March 2026 | Nitrogen, ammonia total [as N], monthly average | 6.59 | ≤ 3 mg/L | 120% |
| March 2026 | Nitrogen, ammonia total [as N], weekly maximum | 10.3 | ≤ 4.5 mg/L | 129% |
| August 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 27.1 | ≤ 10 mg/L | 171% |
| August 2026 | BOD, carbonaceous [5 day, 20 C], weekly maximum | 67.5 | ≤ 15 mg/L | 350% |
| August 2026 | Chlorine, total residual, daily maximum | .1 | ≤ .019 mg/L | 426% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Mar, Jun, Aug, Dec | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Mar, Jun, Aug, Dec | 001 |
| Flow rate | monthly average | report only (gal/d) | all year | 001 |
| Flow rate | daily maximum | report only (gal/d) | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Mar, Jun, Aug, Dec | 001 |
| pH | daily minimum | report only (SU) | Mar, Jun, Aug, Dec | 001 |
| pH | daily maximum | report only (SU) | Mar, Jun, Aug, Dec | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 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 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 602 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 602 |
| Flow rate | monthly average | report only (gal/d) | all year | 602 |
| Flow rate | daily maximum | report only (gal/d) | all year | 602 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 6 mg/L | Mar, Jun, Aug, Dec | 602 |
| pH | daily minimum | ≥ 6.5 SU | Mar, Jun, Aug, Dec | 602 |
| pH | daily maximum | ≤ 9 SU | Mar, Jun, Aug, Dec | 602 |
| Solids, total suspended | monthly average | ≤ 12 mg/L | Mar, Jun, Aug, Dec | 602 |
| Solids, total suspended | weekly maximum | ≤ 18 mg/L | Mar, Jun, Aug, Dec | 602 |
| Solids, total suspended | monthly average | ≤ .11 kg/d | Mar, Jun, Aug, Dec | 602 |
| Solids, total suspended | weekly maximum | ≤ .17 kg/d | Mar, Jun, Aug, Dec | 602 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3 mg/L | Mar, Dec | 602 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | Jun, Aug | 602 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 4.5 mg/L | Mar, Dec | 602 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1.5 mg/L | Jun, Aug | 602 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .028 kg/d | Mar, Dec | 602 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .0095 kg/d | Jun, Aug | 602 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ .043 kg/d | Mar, Dec | 602 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ .014 kg/d | Jun, Aug | 602 |
| Turbidity [severity] | monthly average | report only (severity) | all year | 602 |
| Turbidity [severity] | daily maximum | report only (severity) | all year | 602 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 MPN/100mL | Jun, Aug | 602 |
| E. coli, MTEC-MF | weekly geometric mean | ≤ 284 MPN/100mL | Jun, Aug | 602 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | Jun, Aug | 602 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | Mar, Jun, Aug, Dec | 602 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 15 mg/L | Mar, Jun, Aug, Dec | 602 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ .095 kg/d | Mar, Jun, Aug, Dec | 602 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ .14 kg/d | Mar, Jun, Aug, Dec | 602 |
Cited limits by parameter: Ohio's rules and the federal ones.
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