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Sewage treatment plant, Thornville, Ohio. NPDES permit OH0027723, in force until Feb 29, 2028. Last 12 months: over a limit 32 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Phosphorus, total [as P], monthly average | 2.25 | ≤ 1 mg/L | 125% |
| October 2025 | Phosphorus, total [as P], weekly maximum | 2.43 | ≤ 1.5 mg/L | 62% |
| November 2025 | Phosphorus, total [as P], monthly average | 1.03 | ≤ 1 mg/L | 3% |
| March 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 8.3 | ≤ 7.3 kg/d | 14% |
| March 2026 | BOD, carbonaceous [5 day, 20 C], weekly maximum | 14 | ≤ 10.9 kg/d | 28% |
| March 2026 | Solids, total suspended, monthly average | 21 | ≤ 19 kg/d | 11% |
| March 2026 | Solids, total suspended, weekly maximum | 42 | ≤ 28 kg/d | 50% |
| April 2026 | Phosphorus, total [as P], monthly average | 1.21 | ≤ 1 mg/L | 21% |
| May 2026 | E. coli, MTEC-MF, weekly geometric mean | 695 | ≤ 284 MPN/100mL | 145% |
| May 2026 | Phosphorus, total [as P], monthly average | 1.17 | ≤ 1 mg/L | 17% |
| June 2026 | E. coli, MTEC-MF, monthly geometric mean | 173 | ≤ 126 MPN/100mL | 37% |
| June 2026 | E. coli, MTEC-MF, weekly geometric mean | 1460 | ≤ 284 MPN/100mL | 414% |
| June 2026 | Phosphorus, total [as P], monthly average | 1.25 | ≤ 1 mg/L | 25% |
| July 2026 | BOD, carbonaceous [5 day, 20 C], weekly maximum | 11 | ≤ 10.9 kg/d | 1% |
| July 2026 | E. coli, MTEC-MF, weekly geometric mean | 1200 | ≤ 284 MPN/100mL | 323% |
| July 2026 | Phosphorus, total [as P], monthly average | 2.41 | ≤ 1 mg/L | 141% |
| July 2026 | Phosphorus, total [as P], monthly average | 9.16 | ≤ 1.6 kg/d | 473% |
| July 2026 | Phosphorus, total [as P], weekly maximum | 16.1 | ≤ 2.3 kg/d | 600% |
| July 2026 | Phosphorus, total [as P], weekly maximum | 2.44 | ≤ 1.5 mg/L | 63% |
| July 2026 | Solids, total suspended, weekly maximum | 32 | ≤ 28 kg/d | 14% |
| August 2026 | BOD, carbonaceous [5 day, 20 C], monthly average | 11 | ≤ 7.3 kg/d | 51% |
| August 2026 | BOD, carbonaceous [5 day, 20 C], weekly maximum | 21 | ≤ 10.9 kg/d | 93% |
| August 2026 | Phosphorus, total [as P], monthly average | 1.09 | ≤ 1 mg/L | 9% |
| August 2026 | Phosphorus, total [as P], monthly average | 1.69 | ≤ 1.6 kg/d | 6% |
| August 2026 | Phosphorus, total [as P], weekly maximum | 2.67 | ≤ 2.3 kg/d | 16% |
| August 2026 | Solids, total suspended, monthly average | 26 | ≤ 19 kg/d | 37% |
| August 2026 | Solids, total suspended, weekly maximum | 66 | ≤ 28 kg/d | 136% |
| September 2026 | Phosphorus, total [as P], monthly average | 1.81 | ≤ 1 mg/L | 81% |
| September 2026 | Phosphorus, total [as P], monthly average | 2.06 | ≤ 1.6 kg/d | 29% |
| September 2026 | Phosphorus, total [as P], weekly maximum | 2.19 | ≤ 1.5 mg/L | 46% |
| September 2026 | Phosphorus, total [as P], weekly maximum | 2.42 | ≤ 2.3 kg/d | 5% |
| September 2026 | Solids, total suspended, weekly maximum | 31 | ≤ 28 kg/d | 11% |
| 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 | ≥ 6 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 | ≤ 12 mg/L | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 18 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 19 kg/d | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 28 kg/d | all year | 001 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 10 mg/L | all year | 001 |
| Oil and grease [soxhlet extr.] tot. | daily maximum | ≤ 16 kg/d | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 1.3 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.8 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1.9 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 5.7 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.76 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 2.9 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 8.63 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 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 | ≤ 1 mg/L | all year | 001 |
| Phosphorus, total [as P] | weekly maximum | ≤ 1.5 mg/L | all year | 001 |
| Phosphorus, total [as P] | monthly average | ≤ 1.6 kg/d | all year | 001 |
| Phosphorus, total [as P] | weekly maximum | ≤ 2.3 kg/d | 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 | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 001 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, 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 |
| 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 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 4.8 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 7.2 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 7.3 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 10.9 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 |
| 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 |
| Carbonaceous BOD, 5 day, 20 deg C filtrd | monthly average | report only (mg/L) | all year | 601 |
| Carbonaceous BOD, 5 day, 20 deg C filtrd | daily maximum | report only (mg/L) | all year | 601 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 801 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 801 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 801 |
| pH | daily minimum | report only (SU) | all year | 801 |
| pH | daily maximum | report only (SU) | all year | 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) | May–Oct | 801 |
| E. coli, MTEC-MF | daily maximum | report only (MPN/100mL) | May–Oct | 801 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 901 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 901 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | all year | 901 |
| pH | daily minimum | report only (SU) | all year | 901 |
| pH | daily maximum | report only (SU) | all year | 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) | May–Oct | 901 |
| E. coli, MTEC-MF | daily maximum | report only (MPN/100mL) | May–Oct | 901 |
Cited limits by parameter: Ohio's rules and the federal ones.
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