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Electric Services, major discharger, Oologah, Oklahoma. NPDES permit OK0034380, in force until Dec 31, 2026. Last 12 months: no values over a limit, 6 required values missing, 3 of 92 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 004 |
| Oil and grease, hexane extr method | monthly average | ≤ 10 mg/L | all year | 004 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Chlorine, total residual | instantaneous maximum | ≤ .099 mg/L | all year | 004 |
| Temperature, water deg. centigrade | monthly average | report only (deg C) | all year | 005 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 005 |
| pH | minimum | ≥ 6.5 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 005 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 005 |
| Copper, total [as Cu] | monthly average | report only (lb/d) | all year | 005 |
| Copper, total [as Cu] | daily maximum | report only (lb/d) | all year | 005 |
| Selenium, total [as Se] | monthly average | ≤ 4.94 ug/L | all year | 005 |
| Selenium, total [as Se] | daily maximum | ≤ 6.74 ug/L | all year | 005 |
| Selenium, total [as Se] | monthly average | ≤ .122 lb/d | all year | 005 |
| Selenium, total [as Se] | daily maximum | ≤ .165 lb/d | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Chlorine, total residual | instantaneous maximum | ≤ .099 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 101 |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 101 |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 101 |
| Chlorine, free available | monthly average | ≤ 2 lb/d | all year | 101 |
| Chlorine, free available | daily maximum | ≤ 4 lb/d | all year | 101 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 102 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 102 |
| Solids, total suspended | monthly average | ≤ 290 lb/d | all year | 102 |
| Solids, total suspended | daily maximum | ≤ 480 lb/d | all year | 102 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 102 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 102 |
| Oil and grease, hexane extr method | monthly average | ≤ 140 lb/d | all year | 102 |
| Oil and grease, hexane extr method | daily maximum | ≤ 190 lb/d | all year | 102 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 102 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 102 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 103 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 103 |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 103 |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 103 |
| Chlorine, free available | monthly average | ≤ 2 lb/d | all year | 103 |
| Chlorine, free available | daily maximum | ≤ 5 lb/d | all year | 103 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 104 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 104 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 104 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 104 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 104 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 104 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 105 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 105 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 105 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 105 |
| Copper, total [as Cu] | monthly average | ≤ 1 mg/L | all year | 105 |
| Copper, total [as Cu] | daily maximum | ≤ 1 mg/L | all year | 105 |
| Iron, total [as Fe] | monthly average | ≤ 1 mg/L | all year | 105 |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 105 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 105 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 105 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Whole effluent toxicity - retest #1 | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Whole effluent toxicity - retest #2 | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| %Mortality 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX5 |
| %Mortality Static Renewal 7Day Chronic Pimephales Promelas | 7-day minimum | report only (%) | all year | TX5 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (pass=0;fail=1) | all year | TX5 |
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX5 |
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX5 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX5 |
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX5 |
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 7-day minimum | report only (%) | all year | TX5 |
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 7-day minimum | report only (%) | all year | TX5 |
Cited limits by parameter: Oklahoma's rules and the federal ones.
Same industry: the 25 Electric Services permits in Oklahoma.
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