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OG&E-Seminole Generating Station

Electric Services, major discharger, Konawa, Oklahoma. NPDES permit OK0000451, in force until Jan 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (6 values), outfall 002 form A monthly (8 values), outfall 004 form A monthly (4 values), outfall 005 form A monthly (5 values), outfall 006 form A monthly (10 values), outfall TX4 form S twice a year
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 63 reports late

Limits in force (39)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly average≤ 51.3 deg Call year001
Temperature, water deg. centigradedaily maximum≤ 52 deg Call year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
pHminimum≥ 6.5 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 100 mg/Lall year002
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year002
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
pHminimum≥ 6.5 SUall year004
pHmaximum≤ 9 SUall year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Temperature, water deg. centigradedaily maximumreport only (deg C)all year005
pHminimum≥ 6.5 SUall year005
pHmaximum≤ 9 SUall year005
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year005
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year005
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/Lall year006
BOD, 5-day, 20 deg. Cdaily maximum≤ 30 mg/Lall year006
pHminimum≥ 6.5 SUall year006
pHmaximum≤ 9 SUall year006
Solids, total suspendedmonthly average≤ 30 mg/Lall year006
Solids, total suspendeddaily maximum≤ 45 mg/Lall year006
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
E. coligeometric mean≤ 126 MPN/100mLMay–Sep006
E. colidaily maximum≤ 235 MPN/100mLMay–Sep006
LC50 Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (%)all yearTX4
LC50 Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (%)all yearTX4
LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex48-hour minimumreport only (pass=0;fail=1)all yearTX4
LC50 Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (pass=0;fail=1)all yearTX4
%Mortality Static Renewal 48Hr Acute Daphnia Pulex48-hour minimumreport only (%)all yearTX4
% Mortality Static Renewal 48 Hr Pimephales promelas or use TJA6C48-hour minimumreport only (%)all yearTX4

How strict are these limits?

Cited limits by parameter: Oklahoma's rules and the federal ones.

Same industry: the 25 Electric Services permits in Oklahoma.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OK0000451 · MCP: https://passage-data.com/mcp