OG&E-Horseshoe Lake

NPDES permit OK0000442 · Major NON-POTW · effective, expires 2027-02-28 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
33required values missing, on 6 form(s)
11of 100 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (88)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only May, Jun, Jul, Aug, Sep
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9.6 SU all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedDAILY MX <= 100 mg/L all year
002Solids, total suspendedMO AVG <= 33.78 lb/d all year
002Solids, total suspendedDAILY MX <= 112.59 lb/d all year
002Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
002Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
002Oil and grease, hexane extr methodMO AVG <= 16.89 lb/d all year
002Oil and grease, hexane extr methodDAILY MX <= 22.52 lb/d all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
003pHMINIMUM >= 6.5 SU all year
003pHMAXIMUM <= 9 SU all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Chlorine, total residualINST MAX <= .099 mg/L all year
003Chlorine, free availableMO AVG <= .2 mg/L all year
003Chlorine, free availableDAILY MX <= .5 mg/L all year
004pHMINIMUM >= 6.5 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Solids, total suspendedDAILY MX <= 100 mg/L all year
004Solids, total suspendedMO AVG <= 18.01 lb/d all year
004Solids, total suspendedDAILY MX <= 60.05 lb/d all year
004Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
004Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
004Oil and grease, hexane extr methodMO AVG <= 9.01 lb/d all year
004Oil and grease, hexane extr methodDAILY MX <= 12.01 lb/d all year
004Selenium, total [as Se]MO AVG <= 31.8 ug/L all year
004Selenium, total [as Se]DAILY MX <= 55.2 ug/L all year
004Selenium, total [as Se]MO AVG <= .019 lb/d all year
004Selenium, total [as Se]DAILY MX <= .033 lb/d all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
009Copper, total [as Cu]MO AVG report only all year
009Copper, total [as Cu]DAILY MX report only all year
009Copper, total [as Cu]MO AVG report only all year
009Copper, total [as Cu]DAILY MX report only all year
009Flow, in conduit or thru treatment plantMO AVG report only all year
009Flow, in conduit or thru treatment plantDAILY MX report only all year
009Chlorine, total residualINST MAX <= .099 mg/L all year
009Chlorine, free availableMO AVG <= .2 mg/L all year
009Chlorine, free availableDAILY MX <= .5 mg/L all year
012Temperature, water deg. centigradeDAILY MX report only May, Jun, Jul, Aug, Sep
012pHMINIMUM >= 6.5 SU all year
012pHMAXIMUM <= 9.6 SU all year
012Flow, in conduit or thru treatment plantMO AVG report only all year
012Flow, in conduit or thru treatment plantDAILY MX report only all year
IF01Copper, total [as Cu]DAILY MX report only all year
IF02Copper, total [as Cu]DAILY MX report only all year
TX3Whole effluent toxicity - retest #148HR MIN report only all year
TX3Whole effluent toxicity - retest #148HR MIN report only all year
TX3Whole effluent toxicity - retest #248HR MIN report only all year
TX3Whole effluent toxicity - retest #248HR MIN report only all year
TX3LC50 Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
TX3LC50 Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
TX3LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX3LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX3LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX3LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX3LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX3LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX3%Mortality Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX3%Mortality Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX3% Mortality Static Renewal 48 Hr Pimephales promelas or use TJA6C48HR MIN report only all year
TX3% Mortality Static Renewal 48 Hr Pimephales promelas or use TJA6C48HR MIN report only all year
TX9Whole effluent toxicity - retest #148HR MIN report only all year
TX9Whole effluent toxicity - retest #148HR MIN report only all year
TX9Whole effluent toxicity - retest #248HR MIN report only all year
TX9Whole effluent toxicity - retest #248HR MIN report only all year
TX9LC50 Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
TX9LC50 Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
TX9LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX9LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX9LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX9LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX9LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX9LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX9%Mortality Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX9%Mortality Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX9% Mortality Static Renewal 48 Hr Pimephales promelas or use TJA6C48HR MIN report only all year
TX9% Mortality Static Renewal 48 Hr Pimephales promelas or use TJA6C48HR MIN report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states