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Chouteau PWA

Sewage treatment plant, Chouteau, Oklahoma. NPDES permit OK0022764, in force until Sep 30, 2027. Last 12 months: over a limit 52 times (last July 2026), 13 required values missing, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (13 values)
Renewal application due
Apr 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
July 2026
Oct 2024 – Sep 2025
33 values over a limit, 0 required values missing, 0 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 52 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, monthly average109 lb/d≤ 53.4 lb/d104%
October 2025BOD, 5-day, 20 deg. C, monthly average41 mg/L≤ 20 mg/L105%
October 2025BOD, 5-day, 20 deg. C, weekly average47 mg/L≤ 30 mg/L57%
October 2025E. coli, daily maximum2670 CFU/100mL≤ 2030 CFU/100mL32%
November 2025BOD, 5-day, 20 deg. C, monthly average22 mg/L≤ 20 mg/L10%
November 2025Solids, total suspended, monthly average32.5 mg/L≤ 30 mg/L8%
December 2025BOD, 5-day, 20 deg. C, monthly average103.5 lb/d≤ 53.4 lb/d94%
December 2025BOD, 5-day, 20 deg. C, monthly average34.5 mg/L≤ 20 mg/L73%
December 2025BOD, 5-day, 20 deg. C, weekly average36 mg/L≤ 30 mg/L20%
December 2025Solids, total suspended, monthly average82 lb/d≤ 80.1 lb/d2%
January 2026BOD, 5-day, 20 deg. C, monthly average28.5 mg/L≤ 20 mg/L43%
January 2026BOD, 5-day, 20 deg. C, monthly average56.7 lb/d≤ 53.4 lb/d6%
January 2026BOD, 5-day, 20 deg. C, weekly average32 mg/L≤ 30 mg/L7%
January 2026Solids, total suspended, monthly average33 mg/L≤ 30 mg/L10%
February 2026BOD, 5-day, 20 deg. C, monthly average29.5 mg/L≤ 20 mg/L48%
February 2026BOD, 5-day, 20 deg. C, monthly average70 lb/d≤ 53.4 lb/d31%
February 2026BOD, 5-day, 20 deg. C, weekly average50 mg/L≤ 30 mg/L67%
March 2026BOD, 5-day, 20 deg. C, monthly average20.5 mg/L≤ 20 mg/L3%
March 2026BOD, 5-day, 20 deg. C, weekly average38 mg/L≤ 30 mg/L27%
March 2026Chlorine, total residual, instantaneous maximum.15 mg/L≤ .099 mg/L52%
March 2026Solids, total suspended, monthly average38.5 mg/L≤ 30 mg/L28%
March 2026Solids, total suspended, weekly average53 mg/L≤ 45 mg/L18%
March 2026pH, minimum6.4 SU≥ 6.5 SU—
April 2026BOD, 5-day, 20 deg. C, monthly average197 lb/d≤ 53.4 lb/d269%
April 2026BOD, 5-day, 20 deg. C, monthly average78.5 mg/L≤ 20 mg/L293%
April 2026BOD, 5-day, 20 deg. C, weekly average104 mg/L≤ 30 mg/L247%
April 2026Chlorine, total residual, instantaneous maximum.2 mg/L≤ .099 mg/L102%
April 2026E. coli, daily maximum200000 CFU/100mL≤ 2030 CFU/100mL9752%
April 2026E. coli, geometric mean166322 CFU/100mL≤ 630 CFU/100mL26300%
April 2026Solids, total suspended, monthly average33 mg/L≤ 30 mg/L10%
May 2026BOD, 5-day, 20 deg. C, monthly average100 mg/L≤ 20 mg/L400%
May 2026BOD, 5-day, 20 deg. C, monthly average287 lb/d≤ 53.4 lb/d437%
May 2026BOD, 5-day, 20 deg. C, weekly average103 mg/L≤ 30 mg/L243%
May 2026Chlorine, total residual, instantaneous maximum.15 mg/L≤ .099 mg/L52%
May 2026E. coli, daily maximum200000 CFU/100mL≤ 406 CFU/100mL49161%
May 2026E. coli, geometric mean77339 CFU/100mL≤ 126 CFU/100mL61280%
May 2026Solids, total suspended, monthly average120 lb/d≤ 80.1 lb/d50%
May 2026Solids, total suspended, monthly average40.5 mg/L≤ 30 mg/L35%
May 2026Solids, total suspended, weekly average55 mg/L≤ 45 mg/L22%
May 2026pH, minimum5.7 SU≥ 6.5 SU—
June 2026E. coli, daily maximum200000 CFU/100mL≤ 406 CFU/100mL49161%
June 2026E. coli, geometric mean1259.92 CFU/100mL≤ 126 CFU/100mL900%
June 2026pH, minimum6.3 SU≥ 6.5 SU—
July 2026BOD, 5-day, 20 deg. C, monthly average57.8 mg/L≤ 20 mg/L189%
July 2026BOD, 5-day, 20 deg. C, monthly average87.6 lb/d≤ 53.4 lb/d64%
July 2026BOD, 5-day, 20 deg. C, weekly average75 mg/L≤ 30 mg/L150%
July 2026E. coli, daily maximum200000 CFU/100mL≤ 406 CFU/100mL49161%
July 2026E. coli, geometric mean27590 CFU/100mL≤ 126 CFU/100mL21797%
July 2026Solids, total suspended, monthly average54.5 mg/L≤ 30 mg/L82%
July 2026Solids, total suspended, monthly average83.1 lb/d≤ 80.1 lb/d4%
July 2026Solids, total suspended, weekly average67 mg/L≤ 45 mg/L49%
July 2026pH, minimum5 SU≥ 6.5 SU—

Limits in force (15)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 53.4 lb/dall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 80.1 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ .099 mg/Lall year
E. coligeometric mean≤ 126 CFU/100mLMay–Sep
E. coligeometric 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

How strict are these limits?

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

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