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Pawnee, City of

Sewage treatment plant, Pawnee, Oklahoma. NPDES permit OK0026654, in force until Apr 30, 2028. Last 12 months: over a limit 7 times (last August 2026), 16 required values missing, 4 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (16 values)
Renewal application due
Nov 2, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
10 values over a limit, 58 required values missing, 9 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025E. coli, daily maximum3900 CFU/100mL≤ 2030 CFU/100mL92%
October 2025E. coli, daily maximum3900 CFU/100mL≤ 2030 CFU/100mL92%
November 2025pH, minimum0 SU≥ 6.5 SU—
February 2026E. coli, daily maximum6500 CFU/100mL≤ 2030 CFU/100mL220%
June 2026E. coli, daily maximum3700 CFU/100mL≤ 406 CFU/100mL811%
July 2026E. coli, daily maximum3600 CFU/100mL≤ 406 CFU/100mL787%
August 2026E. coli, daily maximum470 CFU/100mL≤ 406 CFU/100mL16%

Limits in force (24)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 125.1 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/LJun–Oct
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedweekly average≤ 22.5 mg/LJun–Oct
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedmonthly average≤ 62.5 lb/dJun–Oct
Solids, total suspendedmonthly average≤ 125.1 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LJun–Oct
Nitrogen, ammonia total [as N]weekly average≤ 7.5 mg/LJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 20.9 lb/dJun–Oct
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 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
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 18 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 50 lb/dJun–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/OK0026654 · MCP: https://passage-data.com/mcp