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Okemah Utilities Authority

Sewage treatment plant, Okemah, Oklahoma. NPDES permit OK0020737, in force until Nov 30, 2029. Last 12 months: over a limit 3 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (17 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
6 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
May 2026E. coli, daily maximum727 MPN/100mL≤ 406 MPN/100mL79%
August 2026E. coli, daily maximum2419.6 MPN/100mL≤ 406 MPN/100mL496%
August 2026E. coli, geometric mean149.6364 MPN/100mL≤ 126 MPN/100mL19%

Limits in force (26)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
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≤ 86.1 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≤ 64.6 lb/dApr–Oct
Solids, total suspendedmonthly average≤ 129.1 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 6 mg/LApr, May
Nitrogen, ammonia total [as N]weekly average≤ 6 mg/LJun–Oct
Nitrogen, ammonia total [as N]weekly average≤ 9 mg/LApr, May
Nitrogen, ammonia total [as N]monthly average≤ 17.2 lb/dJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 25.8 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
Chlorine, total residualinstantaneous maximum≤ .099 mg/Lall year
E. coligeometric mean≤ 126 MPN/100mLMay–Sep
E. colidaily maximum≤ 406 MPN/100mLMay–Sep
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LApr–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LApr–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 43 lb/dApr–Oct

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/OK0020737 · MCP: https://passage-data.com/mcp