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Sewage treatment plant, West Union, Ohio. NPDES permit OH0028088, in force until Feb 29, 2028. Last 12 months: over a limit 22 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Peracetic Acid, daily maximum | 767 | ≤ 330 ug/L | 132% |
| January 2026 | Solids, total suspended, monthly average | 10.3 | ≤ 10.25 mg/L | 0% |
| February 2026 | Solids, total suspended, monthly average | 12.9 | ≤ 10.25 mg/L | 26% |
| February 2026 | Solids, total suspended, monthly average | 34.1 | ≤ 27.1 kg/d | 26% |
| February 2026 | Solids, total suspended, weekly maximum | 23.2 | ≤ 15.5 mg/L | 50% |
| February 2026 | Solids, total suspended, weekly maximum | 46.4 | ≤ 41.1 kg/d | 13% |
| May 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 10.9 | ≤ 8.5 mg/L | 28% |
| May 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 26.1 | ≤ 22.6 kg/d | 15% |
| May 2026 | BOD, carbonaceous [5 day, 20 C], weekly maximum | 13.8 | ≤ 13 mg/L | 6% |
| May 2026 | Peracetic Acid, daily maximum | 3570 | ≤ 330 ug/L | 982% |
| August 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 28.9 | ≤ 22.6 kg/d | 28% |
| August 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 9.56 | ≤ 8.5 mg/L | 12% |
| August 2026 | BOD, carbonaceous [5 day, 20 C], weekly maximum | 16.1 | ≤ 13 mg/L | 24% |
| August 2026 | BOD, carbonaceous [5 day, 20 C], weekly maximum | 74.9 | ≤ 34.5 kg/d | 117% |
| August 2026 | E. coli, MTEC-MF, weekly geometric mean | 560 | ≤ 284 MPN/100mL | 97% |
| August 2026 | Nitrogen, ammonia total [as N], monthly average | 1.12 | ≤ .8 mg/L | 40% |
| August 2026 | Nitrogen, ammonia total [as N], monthly average | 4.86 | ≤ 2.12 kg/d | 129% |
| August 2026 | Nitrogen, ammonia total [as N], weekly maximum | 19.2 | ≤ 3.18 kg/d | 504% |
| August 2026 | Nitrogen, ammonia total [as N], weekly maximum | 4.32 | ≤ 1.2 mg/L | 260% |
| September 2026 | Nitrogen, ammonia total [as N], monthly average | 1.09 | ≤ .8 mg/L | 36% |
| September 2026 | Nitrogen, ammonia total [as N], weekly maximum | 2.09 | ≤ 1.2 mg/L | 74% |
| September 2026 | Nitrogen, ammonia total [as N], weekly maximum | 5.04 | ≤ 3.18 kg/d | 58% |
| 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 |
| Solids, total suspended | monthly average | ≤ 10.25 mg/L | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 15.5 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 27.1 kg/d | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 41.1 kg/d | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .8 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1.2 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2.12 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 3.18 kg/d | 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 |
| Nickel, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Lead, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Lead, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Chromium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Copper, total recoverable | daily maximum | ≤ 31 ug/L | Mar, Jun, Aug, Dec | 001 |
| Copper, total recoverable | daily maximum | ≤ .0822 kg/d | Mar, Jun, Aug, Dec | 001 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | Mar, Jun, Aug, 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 |
| 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 |
| Cyanide, free available | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Cyanide, free available | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Peracetic Acid | daily maximum | ≤ 330 ug/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 8.5 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 13 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 22.6 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 34.5 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 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 601 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 601 |
| 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 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 801 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 801 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 801 |
| Nitrite + Nitrate 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 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 901 |
| Phosphorus, total [as P] | 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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