OG&E-Seminole Generating Station

NPDES permit OK0000451 · Major NON-POTW · effective, expires 2030-01-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

0values over a limit
0required values missing, on 0 form(s)
0of 59 forms filed late

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

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among OK permits in EPA's filings — check your permit).

Limits in force (39)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMO AVG <= 51.3 deg C all year
001Temperature, water deg. centigradeDAILY MX <= 52 deg C all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 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
002Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
002Oil and grease, hexane extr methodDAILY MX <= 20 mg/L 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
004pHMINIMUM >= 6.5 SU all year
004pHMAXIMUM <= 9 SU 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
005Temperature, water deg. centigradeDAILY MX report only all year
005pHMINIMUM >= 6.5 SU all year
005pHMAXIMUM <= 9 SU all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
006BOD, 5-day, 20 deg. CMO AVG <= 20 mg/L all year
006BOD, 5-day, 20 deg. CDAILY MX <= 30 mg/L all year
006pHMINIMUM >= 6.5 SU all year
006pHMAXIMUM <= 9 SU all year
006Solids, total suspendedMO AVG <= 30 mg/L all year
006Solids, total suspendedDAILY MX <= 45 mg/L all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006E. coliGEO MEAN <= 126 MPN/100mL May, Jun, Jul, Aug, Sep
006E. coliDAILY MX <= 235 MPN/100mL May, Jun, Jul, Aug, Sep
TX4LC50 Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
TX4LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX4LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX4LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX4%Mortality Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX4% 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