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Coweta PWA

Sewage treatment plant, major discharger, Coweta, Oklahoma. NPDES permit OK0020281 expired May 31, 2021; its limits still apply. Last 12 months: over a limit 36 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (13 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
39 values over a limit, 0 required values missing, 0 of 12 reports late

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

All 36 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, monthly average253 lb/d≤ 190.2 lb/d33%
October 2025BOD, 5-day, 20 deg. C, monthly average37.2 mg/L≤ 30 mg/L24%
November 2025BOD, 5-day, 20 deg. C, monthly average474.8 lb/d≤ 190.2 lb/d150%
November 2025BOD, 5-day, 20 deg. C, monthly average56.7 mg/L≤ 30 mg/L89%
November 2025BOD, 5-day, 20 deg. C, weekly average120 mg/L≤ 45 mg/L167%
December 2025BOD, 5-day, 20 deg. C, monthly average125.7 mg/L≤ 30 mg/L319%
December 2025BOD, 5-day, 20 deg. C, monthly average894.9 lb/d≤ 190.2 lb/d371%
December 2025BOD, 5-day, 20 deg. C, weekly average397 mg/L≤ 45 mg/L782%
January 2026BOD, 5-day, 20 deg. C, monthly average121.5 mg/L≤ 30 mg/L305%
January 2026BOD, 5-day, 20 deg. C, monthly average928.8 lb/d≤ 190.2 lb/d388%
January 2026BOD, 5-day, 20 deg. C, weekly average226 mg/L≤ 45 mg/L402%
February 2026BOD, 5-day, 20 deg. C, monthly average760.3 lb/d≤ 190.2 lb/d300%
February 2026BOD, 5-day, 20 deg. C, monthly average89.8 mg/L≤ 30 mg/L199%
February 2026BOD, 5-day, 20 deg. C, weekly average127 mg/L≤ 45 mg/L182%
March 2026BOD, 5-day, 20 deg. C, monthly average337.7 lb/d≤ 190.2 lb/d78%
March 2026BOD, 5-day, 20 deg. C, monthly average45.1 mg/L≤ 30 mg/L50%
March 2026BOD, 5-day, 20 deg. C, weekly average57.5 mg/L≤ 45 mg/L28%
April 2026BOD, 5-day, 20 deg. C, monthly average1370 lb/d≤ 190.2 lb/d620%
April 2026BOD, 5-day, 20 deg. C, monthly average145.7 mg/L≤ 30 mg/L386%
April 2026BOD, 5-day, 20 deg. C, weekly average309 mg/L≤ 45 mg/L587%
May 2026BOD, 5-day, 20 deg. C, monthly average121 mg/L≤ 30 mg/L303%
May 2026BOD, 5-day, 20 deg. C, monthly average998.3 lb/d≤ 190.2 lb/d425%
May 2026BOD, 5-day, 20 deg. C, weekly average372 mg/L≤ 45 mg/L727%
June 2026BOD, 5-day, 20 deg. C, monthly average37.4 mg/L≤ 30 mg/L25%
June 2026BOD, 5-day, 20 deg. C, monthly average572.3 lb/d≤ 190.2 lb/d201%
June 2026BOD, 5-day, 20 deg. C, weekly average49.8 mg/L≤ 45 mg/L11%
July 2026BOD, 5-day, 20 deg. C, monthly average408.7 lb/d≤ 190.2 lb/d115%
July 2026BOD, 5-day, 20 deg. C, monthly average48.9 mg/L≤ 30 mg/L63%
July 2026BOD, 5-day, 20 deg. C, weekly average56 mg/L≤ 45 mg/L24%
August 2026BOD, 5-day, 20 deg. C, monthly average293.4 lb/d≤ 190.2 lb/d54%
August 2026BOD, 5-day, 20 deg. C, monthly average62 mg/L≤ 30 mg/L107%
August 2026BOD, 5-day, 20 deg. C, weekly average70.2 mg/L≤ 45 mg/L56%
September 2026BOD, 5-day, 20 deg. C, monthly average247.1 lb/d≤ 190.2 lb/d30%
September 2026BOD, 5-day, 20 deg. C, monthly average45.9 mg/L≤ 30 mg/L53%
September 2026BOD, 5-day, 20 deg. C, weekly average65.9 mg/L≤ 45 mg/L46%
September 2026E. coli, daily maximum1553 MPN/100mL≤ 406 MPN/100mL283%

Limits in force (15)

ParameterStatisticLimitMonths
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≤ 190.2 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≤ 570.5 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 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

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

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Your permit document is the final word. As JSON: /api/v1/permits/OK0020281 · MCP: https://passage-data.com/mcp