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Bristow, City of

Sewage treatment plant, Bristow, Oklahoma. NPDES permit OK0032549, in force until Jan 31, 2027. Last 12 months: over a limit 16 times (last September 2026), 48 required values missing, 6 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (17 values)
Renewal application due
Aug 4, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
16 values over a limit, 0 required values missing, 3 of 12 reports late

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

All 16 values over a limit
Period endingParameterReportedLimitOver by
October 2025pH, maximum9.6 SU≤ 9 SU—
November 2025Oxygen, dissolved [DO], monthly minimum.1 mg/L≥ 5 mg/L98%
November 2025Oxygen, dissolved [DO], monthly minimum.1 mg/L≥ 5 mg/L98%
November 2025pH, maximum9.2 SU≤ 9 SU—
December 2025Oxygen, dissolved [DO], monthly minimum.07 mg/L≥ 5 mg/L99%
December 2025Oxygen, dissolved [DO], monthly minimum.07 mg/L≥ 5 mg/L99%
January 2026Oxygen, dissolved [DO], monthly minimum.07 mg/L≥ 5 mg/L99%
January 2026Oxygen, dissolved [DO], monthly minimum.07 mg/L≥ 5 mg/L99%
January 2026pH, minimum5.8 SU≥ 6.5 SU—
February 2026pH, minimum6.3 SU≥ 6.5 SU—
April 2026pH, minimum6.4 SU≥ 6.5 SU—
July 2026E. coli, daily maximum600 CFU/100mL≤ 406 CFU/100mL48%
August 2026E. coli, daily maximum740 CFU/100mL≤ 406 CFU/100mL82%
August 2026pH, minimum6.3 SU≥ 6.5 SU—
September 2026E. coli, daily maximum1300 CFU/100mL≤ 406 CFU/100mL220%
September 2026E. coli, geometric mean585 CFU/100mL≤ 126 CFU/100mL364%

Limits in force (21)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]monthly minimum≥ 5 mg/LJan, Feb, Mar, Jun, Jul, Aug, Sep, Oct, Nov, Dec
Oxygen, dissolved [DO]monthly minimum≥ 6 mg/LApr, May
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 236.4 lb/dJan, Feb, Mar, Nov, Dec
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 236.4 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 6 mg/LApr–Oct
Nitrogen, ammonia total [as N]weekly average≤ 9 mg/LApr–Oct
Nitrogen, ammonia total [as N]monthly average≤ 47.3 lb/dApr–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
Chlorine, total residualdaily maximum≤ .099 mg/Lall year
E. coligeometric mean≤ 126 CFU/100mLMay–Sep
E. colidaily maximum≤ 406 CFU/100mLMay–Sep
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 mg/LApr–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 22.5 mg/LApr–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 118.2 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/OK0032549 · MCP: https://passage-data.com/mcp