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Sewage treatment plant, major discharger, Findlay, Ohio. NPDES permit OH0025135, in force until Oct 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| 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 | ≥ 6.7 mg/L | May–Oct | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5.3 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 14 mg/L | May–Oct | 001 |
| Solids, total suspended | monthly average | ≤ 18 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | weekly maximum | ≤ 22 mg/L | May–Oct | 001 |
| Solids, total suspended | weekly maximum | ≤ 27 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | monthly average | ≤ 795 kg/d | May–Oct | 001 |
| Solids, total suspended | monthly average | ≤ 1030 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Solids, total suspended | weekly maximum | ≤ 1250 kg/d | May–Oct | 001 |
| Solids, total suspended | weekly maximum | ≤ 1540 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .91 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 3.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1.4 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 5.3 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 51.7 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 199 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 79.5 kg/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 301 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 | ≤ 56.8 kg/d | all year | 001 |
| Phosphorus, total [as P] | weekly maximum | ≤ 85.2 kg/d | all year | 001 |
| Phosphate, ortho, dissolved [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphate, ortho, dissolved [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 | 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) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | 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 |
| Rainfall | monthly average | report only (in) | all year | 001 |
| Rainfall | daily maximum | report only (in) | all year | 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 | ≤ 3.3 ng/L | all year | 001 |
| Mercury, total low level | daily maximum | ≤ 1700 ng/L | all year | 001 |
| Mercury, total low level | monthly average | ≤ .00019 kg/d | all year | 001 |
| Mercury, total low level | daily maximum | ≤ .0966 kg/d | all year | 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 |
| Toxicity [acute], Ceriodaphnia dubia | monthly average | report only (tox acute) | Oct | 001 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | Oct | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | monthly average | report only (tox chronic) | Oct | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | daily maximum | report only (tox chronic) | Oct | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox acute) | Oct | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | Oct | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox chronic) | Oct | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox chronic) | Oct | 001 |
| pH, maximum | daily maximum | ≤ 9 SU | all year | 001 |
| pH, minimum | daily minimum | ≥ 6.5 SU | all year | 001 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 001 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 13 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 15 mg/L | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 20 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 568 kg/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 739 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 852 kg/d | May–Oct | 001 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 1140 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Overflows | monthly average | report only (occur/mo) | all year | 002 |
| Overflows | daily maximum | report only (occur/mo) | all year | 002 |
| Overflows | monthly average | report only (occur/mo) | all year | 003 |
| Overflows | daily maximum | report only (occur/mo) | all year | 003 |
| 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 |
| Overflows | monthly average | report only (occur/mo) | all year | 005 |
| Overflows | daily maximum | report only (occur/mo) | all year | 005 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 005 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 005 |
| Overflows | monthly average | report only (occur/mo) | all year | 006 |
| Overflows | daily maximum | report only (occur/mo) | all year | 006 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 006 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 006 |
| Overflows | monthly average | report only (occur/mo) | all year | 007 |
| Overflows | daily maximum | report only (occur/mo) | all year | 007 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 007 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 007 |
| Overflows | monthly average | report only (occur/mo) | all year | 010 |
| Overflows | daily maximum | report only (occur/mo) | all year | 010 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 010 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 010 |
| Overflows | monthly average | report only (occur/mo) | all year | 011 |
| Overflows | daily maximum | report only (occur/mo) | all year | 011 |
| Overflows | monthly average | report only (occur/mo) | all year | 012 |
| Overflows | daily maximum | report only (occur/mo) | all year | 012 |
| Overflows | monthly average | report only (occur/mo) | all year | 013 |
| Overflows | daily maximum | report only (occur/mo) | all year | 013 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 013 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 013 |
| Overflows | monthly average | report only (occur/mo) | all year | 014 |
| Overflows | daily maximum | report only (occur/mo) | all year | 014 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 014 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 014 |
| Overflows | monthly average | report only (occur/mo) | all year | 015 |
| Overflows | daily maximum | report only (occur/mo) | all year | 015 |
| Overflows | monthly average | report only (occur/mo) | all year | 016 |
| Overflows | daily maximum | report only (occur/mo) | all year | 016 |
| Overflows | monthly average | report only (occur/mo) | all year | 018 |
| Overflows | daily maximum | report only (occur/mo) | all year | 018 |
| Overflows | monthly average | report only (occur/mo) | all year | 019 |
| Overflows | daily maximum | report only (occur/mo) | all year | 019 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 019 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 019 |
| Overflows | monthly average | report only (occur/mo) | all year | 022 |
| Overflows | daily maximum | report only (occur/mo) | all year | 022 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 022 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 022 |
| Overflows | monthly average | report only (occur/mo) | all year | 023 |
| Overflows | daily maximum | report only (occur/mo) | all year | 023 |
| Overflow volume [SS0 volume, CSO volume] | monthly average | report only (Mgal) | all year | 023 |
| Overflow volume [SS0 volume, CSO volume] | daily maximum | report only (Mgal) | all year | 023 |
| Overflows | monthly average | report only (occur/mo) | all year | 024 |
| Overflows | daily maximum | report only (occur/mo) | all year | 024 |
| Overflows | monthly average | report only (occur/mo) | all year | 025 |
| Overflows | daily maximum | report only (occur/mo) | all year | 025 |
| Overflows | monthly average | report only (occur/mo) | all year | 026 |
| Overflows | daily maximum | report only (occur/mo) | all year | 026 |
| 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 weight, dry | monthly average | report only (dry ton) | Dec | 588 |
| Sludge weight, dry | daily maximum | report only (dry ton) | 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 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 601 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 601 |
| Cyanide, total [as CN] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 601 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 601 |
| Nickel, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Lead, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Lead, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Chromium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | all year | 601 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 601 |
| Mercury, total low level | monthly average | report only (ng/L) | all year | 601 |
| Mercury, total low level | daily maximum | report only (ng/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 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 801 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 801 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 801 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 801 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 801 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 801 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 801 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 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 |
| %Effect Static Renewal 48Hr Acute Ceriodaphnia dubia | monthly average | report only (%) | Oct | 801 |
| %Effect Static Renewal 48Hr Acute Ceriodaphnia dubia | daily maximum | report only (%) | Oct | 801 |
| %Effect Static Renewal 96Hr Acute Pimephales promelas | monthly average | report only (%) | Oct | 801 |
| %Effect Static Renewal 96Hr Acute Pimephales promelas | daily maximum | report only (%) | Oct | 801 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | monthly average | report only (%) | Oct | 801 |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily maximum | report only (%) | Oct | 801 |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | monthly average | report only (%) | Oct | 801 |
| %Effect Static Renewal 7Day Chronic Pimephales promelas | daily maximum | report only (%) | 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 |
| 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) | all year | 901 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 901 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 901 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 901 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 901 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 901 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 901 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 901 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | all year | 901 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 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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