CP Kelco US, Inc.-Okmulgee

NPDES permit OK0044504 · Major NON-POTW · effective, expires 2029-08-31 · 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

4values over a limit
0required values missing, on 0 form(s)
15of 100 forms filed late

Last period with anything received: 2026-07-31. Most often over: Flow, in conduit or thru treatment plant (2), Potassium, total [as K] (2).

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 (94)

OutfallParameterStatisticLimitMonths
001Color [PT-CO units]MO AVG <= 259 col unit (pc) all year
001Color [PT-CO units]DAILY MX <= 449 col unit (pc) all year
001Oxygen, dissolved [DO]MO MIN >= 6 mg/L Jun, Jul, Aug, Sep, Oct
001Oxygen, dissolved [DO]MO MIN >= 6.5 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 250 lb/d all year
001Solids, total suspendedDAILY MX <= 375 lb/d all year
001Oil and grease, hexane extr methodMO AVG report only all year
001Oil and grease, hexane extr methodDAILY MX <= 15 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG <= 10 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 3 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 15 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 4.5 mg/L Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 83 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 25 lb/d Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 125 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 38 lb/d Jun, Jul, Aug, Sep, Oct
001Oxidants, total residualDAILY MX <= .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
001E. coliGEO MEAN <= 126 MPN/100mL May, Jun, Jul, Aug, Sep
001E. coliDAILY MX <= 235 MPN/100mL May, Jun, Jul, Aug, Sep
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 21 mg/L Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 30 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 31.5 mg/L Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 45 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 175 lb/d Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 250 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 263 lb/d Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 375 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
003Potassium, total [as K]MX WK AV <= 62 mg/L all year
003Potassium, total [as K]DAILY MX < 125 mg/L all year
003Flow, in conduit or thru treatment plantMN WK AV >= 15 cfs all year
003Flow, in conduit or thru treatment plantMX WK AV < 27 cfs all year
004Potassium, total [as K]MX WK AV <= 105 mg/L all year
004Potassium, total [as K]DAILY MX <= 211 mg/L all year
004Flow, in conduit or thru treatment plantMN WK AV >= 27 cfs all year
004Flow, in conduit or thru treatment plantMX WK AV <= 45 cfs all year
005Potassium, total [as K]MX WK AV <= 169 mg/L all year
005Potassium, total [as K]DAILY MX <= 340 mg/L all year
005Flow, in conduit or thru treatment plantMN WK AV >= 45 cfs all year
005Flow, in conduit or thru treatment plantMX WK AV <= 60 cfs all year
006Potassium, total [as K]MX WK AV <= 223 mg/L all year
006Potassium, total [as K]DAILY MX <= 447 mg/L all year
006Flow, in conduit or thru treatment plantMN WK AV >= 60 cfs all year
006Flow, in conduit or thru treatment plantMX WK AV <= 87 cfs all year
007Potassium, total [as K]MX WK AV <= 320 mg/L all year
007Potassium, total [as K]DAILY MX <= 642 mg/L all year
007Flow, in conduit or thru treatment plantMN WK AV >= 87 cfs all year
007Flow, in conduit or thru treatment plantMX WK AV report only all year
021Potassium, total [as K]MX WK AV <= 0 mg/L all year
021Potassium, total [as K]DAILY MX <= 0 mg/L all year
021Flow, in conduit or thru treatment plantMN WK AV >= 0 cfs all year
021Flow, in conduit or thru treatment plantMX WK AV <= 5 cfs all year
022Potassium, total [as K]MX WK AV <= 18 mg/L all year
022Potassium, total [as K]DAILY MX <= 36 mg/L all year
022Flow, in conduit or thru treatment plantMN WK AV >= 5 cfs all year
022Flow, in conduit or thru treatment plantMX WK AV <= 15 cfs all year
997Hardness, total [as CaCO3]DAILY MX report only all year
997Potassium, total [as K]DAILY MX report only all year
998Potassium, total [as K]DAILY MX report only all year
TX1pHDAILY MN report only all year
TX1pHDAILY MX report only all year
TX1Nitrogen, ammonia total [as N]DAILY MN report only all year
TX1Nitrogen, ammonia total [as N]MO AVG report only all year
TX1Nitrogen, ammonia total [as N]DAILY MX report only all year
TX1Whole Effluent Toxicity [WET] - C. dubia7 DA MIN >= 15 % all year
TX1Whole Effluent Toxicity [WET] - D. pulex48HR MIN >= 100 % all year
TX1Whole Effluent Toxicity [WET] - P. promelas48HR MIN >= 100 % all year
TX1Whole Effluent Toxicity [WET] - P. promelas7 DA MIN >= 15 % 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

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