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Sewage treatment plant, Gibsonburg, Ohio. NPDES permit OH0029122, in force until Oct 31, 2029. Last 12 months: over a limit 3 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| February 2026 | Nitrogen, ammonia total [as N], weekly maximum | 10.1 | ≤ 4.5 mg/L | 124% |
| June 2026 | Mercury, total low level, monthly average | .0000047 | ≤ .0000025 kg/d | 88% |
| June 2026 | Mercury, total low level, monthly average | 4.31 | ≤ 1.3 ng/L | 232% |
| 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 | ≤ 13.7 mg/L | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 26 kg/d | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 38 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 | ≤ 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 | ≤ 1.9 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5.68 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 2.84 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 8.52 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 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 |
| 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 |
| 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 |
| 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 | ≤ .019 mg/L | May–Oct | 001 |
| Mercury, total low level | monthly average | ≤ 1.3 ng/L | Mar, Jun, Aug, Dec | 001 |
| Mercury, total low level | daily maximum | ≤ 1700 ng/L | Mar, Jun, Aug, Dec | 001 |
| Mercury, total low level | monthly average | ≤ .0000025 kg/d | Mar, Jun, Aug, Dec | 001 |
| Mercury, total low level | daily maximum | ≤ .0032 kg/d | Mar, Jun, Aug, Dec | 001 |
| Solids, total dissolved- 180 deg. C | monthly average | ≤ 1500 mg/L | all year | 001 |
| Solids, total dissolved- 180 deg. C | monthly average | ≤ 2840 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 15.3 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 19 kg/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 29 kg/d | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Overflows | monthly average | report only (occur/mo) | all year | 003 |
| Overflows | daily maximum | report only (occur/mo) | all year | 003 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 003 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 003 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Overflows | monthly average | report only (occur/mo) | all year | 004 |
| Overflows | daily maximum | report only (occur/mo) | all year | 004 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 004 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 004 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 005 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 005 |
| Bypass Volume | monthly average | report only (Mgal) | all year | 005 |
| Bypass Volume | daily maximum | report only (Mgal) | all year | 005 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 005 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 005 |
| Bypass valve | monthly average | report only (occur/mo) | all year | 005 |
| Bypass valve | daily maximum | report only (occur/mo) | all year | 005 |
| Bypass of treatment | monthly average | report only (hr/mo) | all year | 005 |
| Bypass of treatment | daily maximum | report only (hr/mo) | all year | 005 |
| Overflows | monthly average | report only (occur/mo) | all year | 300 |
| Overflows | daily maximum | report only (occur/mo) | all year | 300 |
| Nitrogen, ammonia in bottom deposits | monthly average | report only (mg/kg) | Dec | 581 |
| Nitrogen, ammonia in bottom deposits | daily maximum | report only (mg/kg) | Dec | 581 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/kg) | Dec | 581 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/kg) | Dec | 581 |
| Phosphorous, total, in bottom deposits | monthly average | report only (mg/kg) | Dec | 581 |
| Phosphorous, total, in bottom deposits | daily maximum | report only (mg/kg) | Dec | 581 |
| Potassium, in bottom deposits | monthly average | report only (mg/kg) | Dec | 581 |
| Potassium, in bottom deposits | daily maximum | report only (mg/kg) | Dec | 581 |
| Arsenic, dry weight | daily maximum | ≤ 75 mg/kg | Dec | 581 |
| Cadmium, in bottom deposits [dry wgt] | daily maximum | ≤ 85 mg/kg | Dec | 581 |
| Copper in bottom deposits [dry wgt] | daily maximum | ≤ 4300 mg/kg | Dec | 581 |
| Lead, total dry weight [as Pb] | daily maximum | ≤ 840 mg/kg | Dec | 581 |
| Nickel, tot in bottom deposits [dry wgt] | daily maximum | ≤ 420 mg/kg | Dec | 581 |
| Zinc in bottom deposits [dry wgt] | daily maximum | ≤ 7500 mg/kg | Dec | 581 |
| Selenium, dry weight | daily maximum | ≤ 100 mg/kg | Dec | 581 |
| Biosolids weight indluding admixtures | monthly average | report only (dry ton) | Dec | 581 |
| Biosolids weight indluding admixtures | daily maximum | report only (dry ton) | Dec | 581 |
| Sludge weight, dry | monthly average | report only (dry ton) | Dec | 581 |
| Sludge weight, dry | daily maximum | report only (dry ton) | Dec | 581 |
| Solids, total, percent | monthly average | report only (%) | Dec | 581 |
| Solids, total, percent | daily maximum | report only (%) | Dec | 581 |
| Mercury, tot in bot deposits [dry wgt] | daily maximum | ≤ 57 mg/kg | Dec | 581 |
| Molybdenum, sludge, total, dry weight [as Mo] | daily maximum | ≤ 75 mg/kg | Dec | 581 |
| Biosolids weight indluding admixtures | monthly average | report only (dry ton) | Dec | 586 |
| Biosolids weight indluding admixtures | daily maximum | report only (dry ton) | Dec | 586 |
| Biosolids weight indluding admixtures | monthly average | report only (dry ton) | Dec | 588 |
| Biosolids weight indluding admixtures | daily maximum | report only (dry ton) | Dec | 588 |
| 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 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Aug, Dec | 601 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Aug, Dec | 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) | all year | 901 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | 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 |
| 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 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 902 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 902 |
| pH | daily minimum | report only (SU) | all year | 902 |
| pH | daily maximum | report only (SU) | all year | 902 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 902 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 902 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 902 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 902 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 902 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 902 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 902 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 902 |
| E. coli, MTEC-MF | monthly geometric mean | report only (MPN/100mL) | May–Oct | 902 |
| E. coli, MTEC-MF | daily maximum | report only (MPN/100mL) | May–Oct | 902 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Phosphorus, total [as P], monthly average | 1 mg/L | new | 2.56 mg/L (12 values) | 2.56× |
| Phosphorus, total [as P], monthly average | 1.9 kg/d | new | — | — |
| Phosphorus, total [as P], weekly maximum | 1.5 mg/L | new | — | — |
| Phosphorus, total [as P], weekly maximum | 2.8 kg/d | new | — | — |
Cited limits by parameter: Ohio's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/OH0029122 · MCP: https://passage-data.com/mcp