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Sewage treatment plant, West Jefferson, Ohio. NPDES permit OH0121134 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 10 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Nitrogen, ammonia total [as N], monthly average | .091 | ≤ .037 kg/d | 146% |
| December 2025 | Nitrogen, ammonia total [as N], monthly average | 8 | ≤ 3 mg/L | 167% |
| December 2025 | Nitrogen, ammonia total [as N], weekly maximum | .18 | ≤ .056 kg/d | 221% |
| December 2025 | Nitrogen, ammonia total [as N], weekly maximum | 16 | ≤ 4.5 mg/L | 256% |
| April 2026 | Nitrogen, ammonia total [as N], weekly maximum | 4.6 | ≤ 4.5 mg/L | 2% |
| May 2026 | Nitrogen, ammonia total [as N], monthly average | 1.1 | ≤ 1 mg/L | 10% |
| August 2026 | Nitrogen, ammonia total [as N], monthly average | .0674 | ≤ .012 kg/d | 462% |
| August 2026 | Nitrogen, ammonia total [as N], monthly average | 5.94 | ≤ 1 mg/L | 494% |
| August 2026 | Nitrogen, ammonia total [as N], weekly maximum | .134 | ≤ .019 kg/d | 605% |
| August 2026 | Nitrogen, ammonia total [as N], weekly maximum | 11.8 | ≤ 1.5 mg/L | 687% |
| 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 |
| 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 | ≥ 5 mg/L | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | Mar, Jun, Aug, Dec | 001 |
| pH | daily maximum | ≤ 9 SU | Mar, Jun, Aug, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 12 mg/L | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 18 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ .15 kg/d | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ .22 kg/d | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1.5 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 4.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .012 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .037 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ .019 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ .056 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 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 | ≤ 126 MPN/100mL | May–Oct | 001 |
| E. coli, MTEC-MF | weekly geometric mean | ≤ 284 MPN/100mL | May–Oct | 001 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 15 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ .12 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ .19 kg/d | all year | 001 |
| Sludge weight, dry | monthly average | report only (dry ton) | Dec | 588 |
| Sludge weight, dry | daily maximum | report only (dry ton) | Dec | 588 |
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/OH0121134 · MCP: https://passage-data.com/mcp