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Barnsdall, City of

Sewage treatment plant, Barnsdall, Oklahoma. NPDES permit OK0027308, in force until Jan 31, 2029. Last 12 months: over a limit 28 times (last April 2026), 83 required values missing, 6 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (14 values)
Last report on file
April 2026
Oct 2024 – Sep 2025
37 values over a limit, 14 required values missing, 2 of 12 reports late

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

All 28 values over a limit
Period endingParameterReportedLimitOver by
October 2025E. coli, daily maximum20000 CFU/100mL≤ 2030 CFU/100mL885%
October 2025E. coli, geometric mean2331 CFU/100mL≤ 630 CFU/100mL270%
October 2025Oxygen, dissolved [DO], minimum5.2 mg/L≥ 6 mg/L13%
November 2025E. coli, daily maximum15700 CFU/100mL≤ 2030 CFU/100mL673%
November 2025E. coli, geometric mean5228 CFU/100mL≤ 630 CFU/100mL730%
December 2025E. coli, daily maximum3600 CFU/100mL≤ 2030 CFU/100mL77%
December 2025E. coli, geometric mean2090 CFU/100mL≤ 630 CFU/100mL232%
January 2026E. coli, daily maximum5000 CFU/100mL≤ 2030 CFU/100mL146%
January 2026E. coli, geometric mean861.2 CFU/100mL≤ 630 CFU/100mL37%
February 2026BOD, 5-day, 20 deg. C, monthly average37.3 mg/L≤ 30 mg/L24%
February 2026BOD, 5-day, 20 deg. C, monthly average37.3 mg/L≤ 30 mg/L24%
March 2026BOD, 5-day, 20 deg. C, monthly average78.8 lb/d≤ 39 lb/d102%
March 2026BOD, 5-day, 20 deg. C, monthly average84.7 mg/L≤ 30 mg/L182%
March 2026BOD, 5-day, 20 deg. C, weekly average113 mg/L≤ 45 mg/L151%
March 2026E. coli, daily maximum2800 CFU/100mL≤ 2030 CFU/100mL38%
March 2026E. coli, geometric mean1086.85 CFU/100mL≤ 630 CFU/100mL73%
April 2026BOD, 5-day, 20 deg. C, monthly average192.2 mg/L≤ 30 mg/L541%
April 2026BOD, 5-day, 20 deg. C, monthly average192.2 mg/L≤ 30 mg/L541%
April 2026BOD, 5-day, 20 deg. C, monthly average39.9 lb/d≤ 39 lb/d2%
April 2026BOD, 5-day, 20 deg. C, monthly average39.9 lb/d≤ 39 lb/d2%
April 2026BOD, 5-day, 20 deg. C, weekly average58.2 mg/L≤ 45 mg/L29%
April 2026BOD, 5-day, 20 deg. C, weekly average58.2 mg/L≤ 45 mg/L29%
April 2026Chlorine, total residual, instantaneous maximum.11 mg/L≤ .099 mg/L11%
April 2026Chlorine, total residual, instantaneous maximum.11 mg/L≤ .099 mg/L11%
April 2026E. coli, daily maximum3300 CFU/100mL≤ 2030 CFU/100mL63%
April 2026E. coli, daily maximum3300 CFU/100mL≤ 2030 CFU/100mL63%
April 2026Solids, total suspended, monthly average122.6 mg/L≤ 90 mg/L36%
April 2026Solids, total suspended, monthly average122.6 mg/L≤ 90 mg/L36%

Limits in force (17)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/LJun–Oct
Oxygen, dissolved [DO]minimum≥ 5 mg/LApr, May
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 39 lb/dall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 90 mg/Lall year
Solids, total suspendedweekly average≤ 135 mg/Lall year
Solids, total suspendedmonthly average≤ 117.1 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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