Choctaw Nation of Oklahoma

NPDES permit OK0046087 · Minor NON-POTW · effective, expires 2027-09-30 · EPA's file as of 2026-09-19

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

0values over a limit
0required values missing, on 0 form(s)
0of 10 forms filed late

Last period with anything received: 2026-06-30.

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 (31)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 6 mg/L Mar, Apr, May
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L Jun, Jul, Aug, Sep, Oct
001Oxygen, dissolved [DO]INST MIN >= 2 mg/L Jan, Feb, Nov, Dec
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspended7 DA AVG <= 45 mg/L all year
001Solids, total suspended30DA AVG <= 23.78 lb/d all year
001Solids, total suspended7 DA AVG <= 35.67 lb/d all year
001Nitrogen, ammonia total [as N]30DA AVG <= 4.91 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 9.86 mg/L all year
001Nitrogen, ammonia total [as N]30DA AVG <= 3.89 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 7.82 lb/d all year
001Flow, in conduit or thru treatment plant30DA AVG report only all year
001Flow, in conduit or thru treatment plant7 DA AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualINST MAX <= 19 ug/L all year
001E. coli30DAVGEO <= 126 CFU/100mL May, Jun, Jul, Aug, Sep
001E. coli30DAVGEO <= 630 CFU/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001E. coliDAILY MX <= 406 CFU/100mL May, Jun, Jul, Aug, Sep
001E. coliDAILY MX <= 2030 CFU/100mL Jan, Feb, Mar, Apr, Oct, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 18 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 15 mg/L Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 27 mg/L Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 22.5 mg/L Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 14.27 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 11.89 lb/d Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 21.4 lb/d Jan, Feb, Mar, Apr, May, Nov, Dec
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 17.84 lb/d Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % 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