GRDA-Chouteau

NPDES permit OK0035149 · Major NON-POTW · effective, expires 2030-09-30 · 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

12values over a limit
0required values missing, on 0 form(s)
0of 50 forms filed late

Last period with anything received: 2026-07-31. Most often over: Iron, total [as Fe] (5), pH (4), Copper, total [as Cu] (2).

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 (56)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspendedMO AVG report only all year
001Solids, total suspendedDAILY MX <= 4068 lb/d all year
001Phosphorous, total organic [as P]MO AVG report only all year
001Phosphorous, total organic [as P]DAILY MX <= 2 mg/L all year
001Phosphorous, total organic [as P]MO AVG report only all year
001Phosphorous, total organic [as P]DAILY MX <= 181 lb/d all year
001Oxidants, total residualINST MAX <= .099 mg/L 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
101Solids, total suspendedMO AVG report only all year
101Solids, total suspendedDAILY MX <= 50 mg/L all year
101Flow, in conduit or thru treatment plantMO AVG report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
102Solids, total suspendedMO AVG <= 30 mg/L all year
102Solids, total suspendedDAILY MX <= 100 mg/L all year
102Oil and grease, hexane extr methodMO AVG <= 15 mg/L all year
102Oil and grease, hexane extr methodDAILY MX <= 20 mg/L all year
102Copper, total [as Cu]MO AVG <= 1 mg/L all year
102Copper, total [as Cu]DAILY MX <= 1 mg/L all year
102Iron, total [as Fe]MO AVG <= 1 mg/L all year
102Iron, total [as Fe]DAILY MX <= 1 mg/L all year
102Flow, in conduit or thru treatment plantMO AVG report only all year
102Flow, in conduit or thru treatment plantDAILY MX report only all year
104Oxidants, free availableMO AVG <= .2 mg/L all year
104Oxidants, free availableDAILY MX <= .5 mg/L all year
104Flow, in conduit or thru treatment plantMO AVG report only all year
104Flow, in conduit or thru treatment plantDAILY MX report only all year
TX1Whole effluent toxicity - retest #148HR MIN report only all year
TX1Whole effluent toxicity - retest #17 DA MIN report only all year
TX1Whole effluent toxicity - retest #248HR MIN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN report only all year
TX1Solids, total dissolved- 180 deg. CDAILY MN report only all year
TX1Solids, total dissolved- 180 deg. CMO AVG report only all year
TX1Solids, total dissolved- 180 deg. CDAILY MX report only all year
TX1LC50 Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
TX1LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX1Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1Pass/Fail Static Renewal 7Day Chronic Pimephales promelas7 DA MIN report only all year
TX1LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX1LC50 Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
TX1%Mortality Static Renewal 48Hr Acute Daphnia Pulex48HR MIN report only all year
TX1% Mortality Static Renewal 48 Hr Pimephales promelas or use TJA6C48HR MIN report only all year
TX1%Mortality 7Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1%Mortality Static Renewal 7Day Chronic Pimephales Promelas7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas7 DA MIN report only all year
TX1Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia7 DA MIN report only all year
TX1Coef Of Var Static Renewal 7Day Chronic Pimephales promelas7 DA 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