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Sewage treatment plant, major discharger, Cincinnati, Ohio. NPDES permit OH0025453, in force until Jun 30, 2030. 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 | 003 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 003 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | weekly maximum | ≤ 45 mg/L | all year | 003 |
| Solids, total suspended | monthly average | ≤ 6245 kg/d | all year | 003 |
| Solids, total suspended | weekly maximum | ≤ 9368 kg/d | all year | 003 |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | 003 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 003 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Phosphate, ortho, dissolved [as P] | monthly average | report only (mg/L) | all year | 003 |
| Phosphate, ortho, dissolved [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Silver total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Silver total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (ug/L) | all year | 003 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 003 |
| Coliform, fecal MF, MFC broth, 44.5 C | monthly geometric mean | ≤ 1000 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| Coliform, fecal MF, MFC broth, 44.5 C | weekly geometric mean | ≤ 2000 #/100mL | Jan, Feb, Mar, Apr, Nov, Dec | 003 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 MPN/100mL | May–Oct | 003 |
| E. coli, MTEC-MF | weekly geometric mean | ≤ 240 MPN/100mL | May–Oct | 003 |
| Dichlorobromomethane | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Dichlorobromomethane | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Dibromochloromethane | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Dibromochloromethane | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Chloroform | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Chloroform | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Benzo[b]fluoranthene | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Benzo[b]fluoranthene | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Benzo[k]fluoranthene | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Benzo[k]fluoranthene | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Benzo[a]pyrene | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Benzo[a]pyrene | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Chrysene | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Chrysene | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Indeno[1,2,3-cd]pyrene | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Indeno[1,2,3-cd]pyrene | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Methyl bromide [Bromomethane] | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Methyl bromide [Bromomethane] | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Benzo[a]anthracene | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Benzo[a]anthracene | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Di[2-ethylhexyl] phthalate [DEHP] | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Polychlorinated biphenyls [PCBs] | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Polychlorinated biphenyls [PCBs] | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ .038 mg/L | all year | 003 |
| Mercury, total low level | monthly average | report only (ng/L) | all year | 003 |
| Mercury, total low level | daily maximum | report only (ng/L) | all year | 003 |
| Carcinogen additivity factor | monthly average | report only (col unit) | Mar, Jun, Aug, Dec | 003 |
| Carcinogen additivity factor | daily maximum | report only (col unit) | Mar, Jun, Aug, Dec | 003 |
| Cyanide, free available | monthly average | report only (ug/L) | all year | 003 |
| Cyanide, free available | daily maximum | report only (ug/L) | all year | 003 |
| Toxicity [acute], Ceriodaphnia dubia | monthly average | report only (tox acute) | Aug | 003 |
| Toxicity [acute], Ceriodaphnia dubia | daily maximum | report only (tox acute) | Aug | 003 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | monthly average | report only (tox acute) | Aug | 003 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | daily maximum | report only (tox acute) | Aug | 003 |
| pH, maximum | daily maximum | ≤ 9 SU | all year | 003 |
| pH, minimum | daily minimum | ≥ 6 SU | all year | 003 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 003 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 40 mg/L | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 5204 kg/d | all year | 003 |
| BOD, carbonaceous [5 day, 20 C] | weekly maximum | ≤ 8327 kg/d | 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 |
| Bypass Volume | monthly average | report only (Mgal) | all year | 004 |
| Bypass 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 |
| Bypass valve | monthly average | report only (occur/mo) | all year | 004 |
| Bypass valve | daily maximum | report only (occur/mo) | all year | 004 |
| Bypass of treatment | monthly average | report only (hr/mo) | all year | 004 |
| Bypass of treatment | daily maximum | report only (hr/mo) | all year | 004 |
| E. coli, MTEC-MF | monthly geometric mean | report only (MPN/100mL) | all year | 098 |
| E. coli, MTEC-MF | daily maximum | report only (MPN/100mL) | all year | 098 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 098 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 098 |
| 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 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 601 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 601 |
| Cyanide, total [as CN] | monthly average | report only (mg/L) | all year | 601 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 601 |
| Selenium, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Nickel, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Nickel, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Cadmium, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Lead, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Chromium, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 601 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 601 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 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 |
| Benzo[a]pyrene | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Benzo[a]pyrene | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Polychlorinated biphenyls [PCBs] | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 601 |
| Polychlorinated biphenyls [PCBs] | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 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 |
| pH, maximum | daily maximum | report only (SU) | all year | 601 |
| pH, minimum | daily minimum | report only (SU) | 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 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 602 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 602 |
| Bypass Volume | monthly average | report only (Mgal) | all year | 602 |
| Bypass Volume | daily maximum | report only (Mgal) | all year | 602 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 602 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 602 |
| Bypass valve | monthly average | report only (occur/mo) | all year | 602 |
| Bypass valve | daily maximum | report only (occur/mo) | all year | 602 |
| Bypass of treatment | monthly average | report only (hr/mo) | all year | 602 |
| Bypass of treatment | daily maximum | report only (hr/mo) | all year | 602 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 610 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 610 |
| Mercury, total low level | daily maximum | report only (ng/L) | all year | 610 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | May–Oct | 801 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May–Oct | 801 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | May–Oct | 801 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | May–Oct | 801 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | May–Oct | 801 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | May–Oct | 801 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | May–Oct | 801 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | May–Oct | 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 |
| %Effect Static Renewal 48Hr Acute Ceriodaphnia dubia | monthly average | report only (%) | Aug | 801 |
| %Effect Static Renewal 48Hr Acute Ceriodaphnia dubia | daily maximum | report only (%) | Aug | 801 |
| %Effect Static Renewal 96Hr Acute Pimephales promelas | monthly average | report only (%) | Aug | 801 |
| %Effect Static Renewal 96Hr Acute Pimephales promelas | daily maximum | report only (%) | Aug | 801 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | May–Oct | 901 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | May–Oct | 901 |
| Oxygen, dissolved [DO] | daily minimum | report only (mg/L) | May–Oct | 901 |
| pH | daily minimum | report only (SU) | May–Oct | 901 |
| pH | daily maximum | report only (SU) | May–Oct | 901 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | May–Oct | 901 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May–Oct | 901 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | May–Oct | 901 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | May–Oct | 901 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | May–Oct | 901 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | May–Oct | 901 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | May–Oct | 901 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | May–Oct | 901 |
| Hardness, total [as CaCO3] | monthly average | report only (mg/L) | May–Oct | 901 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | May–Oct | 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 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Benzo[a]pyrene, monthly average | 0.013 kg/d (Mar, Jun, Aug, Dec) | new | — | — |
| Benzo[a]pyrene, monthly average | 0.061 ug/L (Mar, Jun, Aug, Dec) | new | — | — |
| Carcinogen additivity factor, daily maximum | 1 col unit (Mar, Jun, Aug, Dec) | new | 0 col unit (4 values) | 0× |
Cited limits by parameter: Ohio's rules and the federal ones.
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