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Choctaw Nation of Oklahoma

Industrial or other facility, Durant, Oklahoma. NPDES permit OK0046087, in force until Sep 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A quarterly (23 values)
Renewal application due
Apr 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (31)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/LMar–May
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LJun–Oct
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/LJan, Feb, Nov, Dec
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 23.78 lb/dall year
Solids, total suspended7-day average≤ 35.67 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 4.91 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 9.86 mg/Lall year
Nitrogen, ammonia total [as N]30-day average≤ 3.89 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 7.82 lb/dall year
Flow, in conduit or thru treatment plant30-day averagereport only (MGD)all year
Flow, in conduit or thru treatment plant7-day averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ 19 ug/Lall year
E. coli30-day geometric mean≤ 126 CFU/100mLMay–Sep
E. coli30-day geometric mean≤ 630 CFU/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
E. colidaily maximum≤ 406 CFU/100mLMay–Sep
E. colidaily maximum≤ 2030 CFU/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, carbonaceous [5 day, 20 C]30-day average≤ 18 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]30-day average≤ 15 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 27 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]7-day average≤ 22.5 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]30-day average≤ 14.27 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]30-day average≤ 11.89 lb/dJun–Oct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 21.4 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
BOD, carbonaceous [5 day, 20 C]7-day average≤ 17.84 lb/dJun–Oct
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OK0046087 · MCP: https://passage-data.com/mcp