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Electric Services, major discharger, Red Rock, Oklahoma. NPDES permit OK0035068, in force until Mar 31, 2027. Last 12 months: no values over a limit, 4 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | 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 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 101 |
| pH | maximum | ≤ 9 SU | all year | 101 |
| 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, total residual | instantaneous maximum | ≤ .099 mg/L | all year | 101 |
| Chlorine, total residual | daily maximum | ≤ 110 lb/d | 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 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 101 |
| pH | minimum | ≥ 6 SU | all year | 102 |
| pH | maximum | ≤ 9 SU | all year | 102 |
| Copper, total [as Cu] | monthly average | ≤ 1 mg/L | all year | 102 |
| Copper, total [as Cu] | daily maximum | ≤ 1 mg/L | all year | 102 |
| Iron, total [as Fe] | monthly average | ≤ 1 mg/L | all year | 102 |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | 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 |
| pH | minimum | ≥ 6 SU | all year | 103 |
| pH | maximum | ≤ 9 SU | all year | 103 |
| Copper, total [as Cu] | monthly average | ≤ 1 mg/L | all year | 103 |
| Copper, total [as Cu] | daily maximum | ≤ 1 mg/L | all year | 103 |
| Iron, total [as Fe] | monthly average | ≤ 1 mg/L | all year | 103 |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 103 |
| 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 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 106 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 106 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 3.5 lb/d | all year | 106 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 5.3 lb/d | all year | 106 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 106 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 106 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 106 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 106 |
| pH | minimum | ≥ 6.5 SU | all year | 301 |
| pH | maximum | ≤ 9 SU | all year | 301 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 301 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 301 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 301 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 301 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 301 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 301 |
| pH | daily minimum | ≥ 6.5 SU | all year | 501 |
| pH | daily maximum | ≤ 9 SU | all year | 501 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 501 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 501 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 501 |
| pH | daily minimum | ≥ 6.5 SU | all year | 601 |
| pH | daily maximum | ≤ 9 SU | all year | 601 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 601 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 601 |
| Oil and grease, hexane extr method | monthly average | ≤ 15 mg/L | all year | 601 |
| Oil and grease, hexane extr method | daily maximum | ≤ 20 mg/L | all year | 601 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 601 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 601 |
| Chromium, total [as Cr] | monthly average | ≤ 318.4 mg/L | all year | 601 |
| Chromium, total [as Cr] | daily maximum | ≤ 551.6 mg/L | all year | 601 |
| Di[2-ethylhexyl] phthalate [DEHP] | monthly average | ≤ 22 ug/L | all year | 601 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | ≤ 38.12 ug/L | all year | 601 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 601 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 601 |
| Solids, total dissolved- 180 deg. C | daily maximum | report only (mg/L) | all year | 601 |
| pH | minimum | ≥ 6.5 SU | all year | 701 |
| pH | maximum | ≤ 9 SU | all year | 701 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 701 |
| Copper, total [as Cu] | monthly average | ≤ 27.26 ug/L | all year | 701 |
| Copper, total [as Cu] | daily maximum | ≤ 54.27 ug/L | all year | 701 |
| Lead, total [as Pb] | monthly average | ≤ 12.36 ug/L | all year | 701 |
| Lead, total [as Pb] | daily maximum | ≤ 18.03 ug/L | all year | 701 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 701 |
| Phenolics, total recoverable | monthly average | ≤ 860 mg/L | all year | 701 |
| Phenolics, total recoverable | daily maximum | ≤ 1255 mg/L | all year | 701 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 701 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 701 |
| Whole effluent toxicity - retest #1 | 48-hour minimum | report only (pass=0;fail=1) | all year | TX1 |
| Whole effluent toxicity - retest #2 | 48-hour minimum | report only (pass=0;fail=1) | all year | TX1 |
| LC50 Static Renewal 48Hr Acute Daphnia pulex | 48-hour minimum | report only (%) | all year | TX1 |
| LC50 Static Renewal 48Hr Acute Pimephales promelas | 48-hour minimum | report only (%) | all year | TX1 |
| LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex | 48-hour minimum | report only (pass=0;fail=1) | all year | TX1 |
| LC50 Static Renewal 48Hr Acute Pimephales promelas | 48-hour minimum | report only (pass=0;fail=1) | all year | TX1 |
| %Mortality Static Renewal 48Hr Acute Daphnia Pulex | 48-hour minimum | report only (%) | all year | TX1 |
| % Mortality Static Renewal 48 Hr Pimephales promelas or use TJA6C | 48-hour minimum | report only (%) | all year | TX1 |
Cited limits by parameter: Oklahoma's rules and the federal ones.
Same industry: the 25 Electric Services permits in Oklahoma.
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On EPA ECHO: Facility report · DMR history
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