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Electric Services, major discharger, Cheshire, Ohio. NPDES permit OH0028762 expired Aug 31, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | Mar, Jun, Aug, Dec | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 12 mg/L | Mar, Jun, Aug, Dec | 002 |
| Solids, total suspended | daily maximum | ≤ 18 mg/L | Mar, Jun, Aug, Dec | 002 |
| Solids, total suspended | monthly average | ≤ 1.09 kg/d | Mar, Jun, Aug, Dec | 002 |
| Solids, total suspended | daily maximum | ≤ 1.64 kg/d | Mar, Jun, Aug, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | Jun, Aug | 002 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3 mg/L | Jun, Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Dec | 002 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .18 kg/d | Jun, Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ .27 kg/d | Jun, Aug | 002 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 002 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 002 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Turbidity [severity] | monthly average | report only (severity) | all year | 002 |
| Turbidity [severity] | daily maximum | report only (severity) | all year | 002 |
| Coliform, fecal MF, MFC broth, 44.5 C | monthly geometric mean | ≤ 1000 #/100mL | Mar, Dec | 002 |
| Coliform, fecal MF, MFC broth, 44.5 C | daily maximum | ≤ 2000 #/100mL | Mar, Dec | 002 |
| E. coli, MTEC-MF | monthly geometric mean | ≤ 126 MPN/100mL | Jun, Aug | 002 |
| E. coli, MTEC-MF | weekly geometric mean | ≤ 240 MPN/100mL | Jun, Aug | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 10 mg/L | Mar, Jun, Aug, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 15 mg/L | Mar, Jun, Aug, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ .91 kg/d | Mar, Jun, Aug, Dec | 002 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 1.36 kg/d | Mar, Jun, Aug, Dec | 002 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 004 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 004 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 004 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Mar, Jun, Aug, Dec | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Mar, Jun, Aug, Dec | 004 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Aug, Dec | 004 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Aug, Dec | 004 |
| Zinc, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 005 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 005 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 005 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | Mar, Jun, Aug, Dec | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | Mar, Jun, Aug, Dec | 005 |
| Mercury, total low level | monthly average | report only (ng/L) | Mar, Jun, Aug, Dec | 005 |
| Mercury, total low level | daily maximum | report only (ng/L) | Mar, Jun, Aug, Dec | 005 |
| pH | daily minimum | ≥ 6.5 SU | all year | 006 |
| pH | daily maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 99 mg/L | all year | 006 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 006 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 006 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 006 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 006 |
| Copper, total recoverable | daily maximum | ≤ 33 ug/L | all year | 006 |
| Copper, total recoverable | daily maximum | ≤ 1.5 kg/d | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Chlorine, total residual | daily maximum | ≤ .038 mg/L | all year | 006 |
| Mercury, total low level | monthly average | report only (ng/L) | all year | 006 |
| Mercury, total low level | daily maximum | report only (ng/L) | all year | 006 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 006 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 006 |
| pH | daily minimum | ≥ 6 SU | all year | 007 |
| pH | daily maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 007 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 007 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.2 mg/L | May–Oct | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15.1 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17.3 kg/d | May–Oct | 007 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 007 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 007 |
| Fluoride, total [as F] | monthly average | report only (mg/L) | all year | 007 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 007 |
| Arsenic, total recoverable | monthly average | ≤ 118 ug/L | all year | 007 |
| Arsenic, total recoverable | daily maximum | ≤ 344 ug/L | all year | 007 |
| Arsenic, total recoverable | monthly average | ≤ .155 kg/d | all year | 007 |
| Arsenic, total recoverable | daily maximum | ≤ .452 kg/d | all year | 007 |
| Iron, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 007 |
| Iron, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 007 |
| Selenium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 007 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 007 |
| Boron, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 007 |
| Boron, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 007 |
| Barium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 007 |
| Barium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 007 |
| Toxicity, choice of species | daily maximum | ≤ 1 tox acute | Mar, Jun, Aug, Dec | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Mercury, total low level | monthly average | ≤ 30.8 ng/L | all year | 007 |
| Mercury, total low level | daily maximum | ≤ 242 ng/L | all year | 007 |
| Mercury, total low level | monthly average | ≤ .00004 kg/d | all year | 007 |
| Mercury, total low level | daily maximum | ≤ .000318 kg/d | all year | 007 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 007 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 007 |
| pH | daily minimum | ≥ 6 SU | all year | 008 |
| pH | daily maximum | ≤ 9 SU | all year | 008 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 008 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 008 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 008 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 008 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 008 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 008 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 008 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 008 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 008 |
| Fluoride, total [as F] | monthly average | report only (mg/L) | all year | 008 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 008 |
| Arsenic, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 008 |
| Arsenic, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 008 |
| Iron, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 008 |
| Iron, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 008 |
| Selenium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 008 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 008 |
| Boron, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 008 |
| Boron, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 008 |
| Toxicity, choice of species | daily maximum | ≤ 1.6 tox acute | Mar, Jun, Aug, Dec | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| Mercury, total low level | monthly average | ≤ 28.8 ng/L | all year | 008 |
| Mercury, total low level | daily maximum | ≤ 242 ng/L | all year | 008 |
| Mercury, total low level | monthly average | ≤ .000041 kg/d | all year | 008 |
| Mercury, total low level | daily maximum | ≤ .000348 kg/d | all year | 008 |
| Number of Events | daily maximum | ≤ 40 # exceed | Jun, Dec | 008 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | all year | 008 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 008 |
| pH | daily minimum | ≥ 6.5 SU | all year | 009 |
| pH | daily maximum | ≤ 9 SU | all year | 009 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 009 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 009 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 009 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 009 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.6 mg/L | May–Oct | 009 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.8 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 009 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20.9 kg/d | May–Oct | 009 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21.2 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 009 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 009 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 009 |
| Arsenic, total recoverable | monthly average | ≤ 151 ug/L | all year | 009 |
| Arsenic, total recoverable | daily maximum | ≤ 479 ug/L | all year | 009 |
| Arsenic, total recoverable | monthly average | ≤ .232 kg/d | all year | 009 |
| Arsenic, total recoverable | daily maximum | ≤ .736 kg/d | all year | 009 |
| Selenium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 009 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 009 |
| Boron, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 009 |
| Boron, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 009 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 009 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 009 |
| Toxicity, choice of species | daily maximum | ≤ 1 tox acute | Mar, Jun, Aug, Dec | 009 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 009 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 009 |
| Mercury, total low level | monthly average | ≤ 66.4 ng/L | all year | 009 |
| Mercury, total low level | daily maximum | ≤ 242 ng/L | all year | 009 |
| Mercury, total low level | monthly average | ≤ .000102 kg/d | all year | 009 |
| Mercury, total low level | daily maximum | ≤ .000372 kg/d | all year | 009 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 009 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 009 |
| pH | daily minimum | ≥ 6 SU | all year | 011 |
| pH | daily maximum | ≤ 9 SU | all year | 011 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 011 |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year | 011 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 011 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 13.2 mg/L | May–Oct | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.5 kg/d | May–Oct | 011 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17 kg/d | Jan, Feb, Mar, Apr, Nov, Dec | 011 |
| Chloride [as Cl] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 011 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 011 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 011 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 011 |
| Fluoride, total [as F] | monthly average | report only (mg/L) | all year | 011 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 011 |
| Arsenic, total recoverable | monthly average | ≤ 118 ug/L | all year | 011 |
| Arsenic, total recoverable | daily maximum | ≤ 344 ug/L | all year | 011 |
| Arsenic, total recoverable | monthly average | ≤ .174 kg/d | all year | 011 |
| Arsenic, total recoverable | daily maximum | ≤ .508 kg/d | all year | 011 |
| Iron, total recoverable | monthly average | ≤ 5752 ug/L | all year | 011 |
| Iron, total recoverable | monthly average | ≤ 7.55 kg/d | all year | 011 |
| Selenium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 011 |
| Selenium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 011 |
| Boron, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 011 |
| Boron, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 011 |
| Barium, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 011 |
| Barium, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 011 |
| Copper, total recoverable | monthly average | report only (ug/L) | Mar, Jun, Aug, Dec | 011 |
| Copper, total recoverable | daily maximum | report only (ug/L) | Mar, Jun, Aug, Dec | 011 |
| Toxicity, choice of species | daily maximum | ≤ 1 tox acute | Mar, Jun, Aug, Dec | 011 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| Mercury, total low level | monthly average | report only (ng/L) | all year | 011 |
| Mercury, total low level | daily maximum | report only (ng/L) | all year | 011 |
| Solids, total dissolved- 180 deg. C | monthly average | report only (mg/L) | Mar, Jun, Aug, Dec | 011 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | Mar, Jun, Aug, Dec | 011 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 021 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 021 |
| Specific conductance | monthly average | report only (umho/cm) | all year | 022 |
| Specific conductance | daily maximum | report only (umho/cm) | all year | 022 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 022 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 022 |
| Sludge weight, dry | monthly average | report only (dry ton) | Dec | 588 |
| Sludge weight, dry | 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 | 606 |
| pH | daily maximum | report only (SU) | all year | 606 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 606 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 606 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 606 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 606 |
| Iron, total [as Fe] | monthly average | report only (ug/L) | all year | 606 |
| Iron, total [as Fe] | daily maximum | report only (ug/L) | all year | 606 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 606 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 606 |
| Number of Events | daily maximum | ≤ 0 # exceed | all year | 616 |
| Cycles Of Concentration | monthly average | report only (c) | all year | 800 |
| Cycles Of Concentration | daily maximum | report only (c) | all year | 800 |
Cited limits by parameter: Ohio's rules and the federal ones.
Same industry: the 31 Electric Services permits in Ohio.
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