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Atoka, City of

Sewage treatment plant, Atoka, Oklahoma. NPDES permit OK0028576, in force until Jan 31, 2030. Last 12 months: over a limit 8 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (16 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025pH, minimum6.23 SU≥ 6.5 SU—
March 2026E. coli, daily maximum> 2419.6 MPN/100mL≤ 2030 MPN/100mL—
May 2026E. coli, daily maximum1553.1 MPN/100mL≤ 406 MPN/100mL283%
June 2026E. coli, daily maximum2419.6 MPN/100mL≤ 406 MPN/100mL496%
June 2026pH, minimum6.28 SU≥ 6.5 SU—
August 2026E. coli, daily maximum2419.6 MPN/100mL≤ 406 MPN/100mL496%
August 2026E. coli, geometric mean438.825 MPN/100mL≤ 126 MPN/100mL248%
September 2026E. coli, daily maximum2419.6 MPN/100mL≤ 406 MPN/100mL496%

Limits in force (31)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 4 mg/LApr, May
Oxygen, dissolved [DO]instantaneous minimum≥ 3 mg/LJun–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 133.4 lb/dJan, Feb, Mar, Nov, Dec
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/LApr–Oct
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Nov, Dec
Solids, total suspendedweekly average≤ 22.5 mg/LApr–Oct
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Nov, Dec
Solids, total suspendedmonthly average≤ 100.1 lb/dApr–Oct
Solids, total suspendedmonthly average≤ 200.2 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 7 mg/LApr, May
Nitrogen, ammonia total [as N]weekly average≤ 7.5 mg/LJun–Oct
Nitrogen, ammonia total [as N]weekly average≤ 10.5 mg/LApr, May
Nitrogen, ammonia total [as N]monthly average≤ 33.4 lb/dJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 46.7 lb/dApr, May
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
E. coligeometric mean≤ 126 MPN/100mLMay–Sep
E. coligeometric mean≤ 630 MPN/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
E. colidaily maximum≤ 406 MPN/100mLMay–Sep
E. colidaily maximum≤ 2030 MPN/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 mg/LApr, May
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 18 mg/LApr, May
BOD, carbonaceous [5 day, 20 C]monthly average≤ 66.7 lb/dJun–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 80.1 lb/dApr, May

How strict are these limits?

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

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