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Sewage treatment plant, Williamsport, Ohio. NPDES permit OH0022519 expired Apr 30, 2021; its limits still apply. Last 12 months: over a limit 11 times (last August 2026), 19 required values missing, 13 of 43 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Chlorine, total residual, daily maximum | .18 | ≤ .038 mg/L | 374% |
| October 2025 | E. coli, MTEC-MF, weekly geometric mean | 9800 | ≤ 284 MPN/100mL | 3351% |
| December 2025 | Solids, total suspended, monthly average | 730 | ≤ 17 kg/d | 4194% |
| December 2025 | Solids, total suspended, weekly maximum | 3300 | ≤ 25.5 kg/d | 12841% |
| December 2025 | pH, daily minimum | 6.23 | ≥ 6.5 SU | — |
| January 2026 | pH, daily maximum | 9.4 | ≤ 9 SU | — |
| May 2026 | Chlorine, total residual, daily maximum | 1.3 | ≤ .038 mg/L | 3321% |
| June 2026 | Chlorine, total residual, daily maximum | .9 | ≤ .038 mg/L | 2268% |
| July 2026 | Chlorine, total residual, daily maximum | .1 | ≤ .038 mg/L | 163% |
| July 2026 | E. coli, MTEC-MF, weekly geometric mean | 416 | ≤ 284 MPN/100mL | 46% |
| August 2026 | Chlorine, total residual, daily maximum | 2 | ≤ .038 mg/L | 5163% |
| 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 | ≥ 5 mg/L | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 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 | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 17 kg/d | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 25.5 kg/d | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | Mar, Jun, Aug, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia 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 |
| Nickel, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Lead, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Lead, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Chromium, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Copper, total recoverable | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | Jun, Dec | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | Jun, Dec | 001 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 MPN/100mL | May–Oct | 001 |
| E. coli, MTEC-MF | weekly geometric mean | ≤ 284 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 | ≤ .038 mg/L | May–Oct | 001 |
| Mercury, total low level | monthly average | report only (ng/L) | Jun, Dec | 001 |
| Mercury, total low level | daily maximum | report only (ng/L) | Jun, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 40 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 14.2 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 22.7 kg/d | all year | 001 |
| Overflows | monthly average | report only (occur/mo) | all year | 300 |
| Overflows | daily maximum | report only (occur/mo) | all year | 300 |
| Biosolids weight indluding admixtures | monthly average | report only (dry ton) | Dec | 586 |
| Biosolids weight indluding admixtures | daily maximum | report only (dry ton) | Dec | 586 |
| 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 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Mar, Jun, Aug, Dec | 801 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Mar, Jun, Aug, Dec | 801 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Mar, Jun, Aug, Dec | 801 |
| pH | daily minimum | report only (SU) | Mar, Jun, Aug, Dec | 801 |
| pH | daily maximum | report only (SU) | Mar, Jun, Aug, Dec | 801 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 801 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 801 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 801 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 801 |
| E. coli, MTEC-MF | monthly geometric mean | report only (MPN/100mL) | Jun, Aug | 801 |
| E. coli, MTEC-MF | daily maximum | report only (MPN/100mL) | Jun, Aug | 801 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | Mar, Jun, Aug, Dec | 901 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Mar, Jun, Aug, Dec | 901 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| pH | daily minimum | report only (SU) | Mar, Jun, Aug, Dec | 901 |
| pH | daily maximum | report only (SU) | Mar, Jun, Aug, Dec | 901 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| E. coli, MTEC-MF | monthly geometric mean | report only (MPN/100mL) | Jun, Aug | 901 |
| E. coli, MTEC-MF | daily maximum | report only (MPN/100mL) | Jun, Aug | 901 |
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/OH0022519 · MCP: https://passage-data.com/mcp