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AECI - Chouteau Power Plant

Electric Services, major discharger, Pryor, Oklahoma. NPDES permit OK0043907, in force until Jan 31, 2029. 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 (7 values), outfall 101 form A monthly (6 values), outfall 103 form A monthly (6 values), outfall 001 form Y yearly, outfall TX1 form Q quarterly
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 41 reports late

Limits in force (29)

ParameterStatisticLimitMonthsOutfall
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
Chlorine, total residualinstantaneous maximum≤ .099 mg/Lall year001
Chlorine, free availablemonthly average≤ .2 mg/Lall year001
Chlorine, free availabledaily maximum≤ .5 mg/Lall year001
Chloritemonthly averagereport only (ug/L)all year001
Chloritedaily maximum≤ 288.5 ug/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year101
Solids, total suspendeddaily maximum≤ 100 mg/Lall year101
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year101
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year101
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
Solids, total suspendedmonthly average≤ 30 mg/Lall year103
Solids, total suspendeddaily maximum≤ 100 mg/Lall year103
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year103
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year103
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year103
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year103
Whole effluent toxicity - retest #148-hour minimumreport only (pass=0;fail=1)all yearTX1
Whole effluent toxicity - retest #248-hour minimumreport only (pass=0;fail=1)all yearTX1
LC50 Static Renewal 48Hr Acute Daphnia pulex48-hour minimumreport only (%)all yearTX1
LC50 Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (%)all yearTX1
LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex48-hour minimumreport only (pass=0;fail=1)all yearTX1
LC50 Static Renewal 48Hr Acute Pimephales promelas48-hour minimumreport only (pass=0;fail=1)all yearTX1
%Mortality Static Renewal 48Hr Acute Daphnia Pulex48-hour minimumreport only (%)all yearTX1
% Mortality Static Renewal 48 Hr Pimephales promelas or use TJA6C48-hour minimumreport only (%)all yearTX1

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/OK0043907 · MCP: https://passage-data.com/mcp