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Ochelata Utility Authority

Sewage treatment plant, Ochelata, Oklahoma. NPDES permit OK0034517, in force until Mar 31, 2027. Last 12 months: over a limit 23 times (last September 2026), 30 required values missing, 2 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
Oct 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 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)

All 23 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], monthly average1.74 lb/d≤ 1 lb/d74%
October 2025Nitrogen, ammonia total [as N], monthly average3.16 mg/L≤ 2 mg/L58%
October 2025Nitrogen, ammonia total [as N], weekly average3.16 mg/L≤ 3 mg/L5%
October 2025Solids, total suspended, monthly average16.4 mg/L≤ 15 mg/L9%
October 2025Solids, total suspended, monthly average9.03 lb/d≤ 7.5 lb/d20%
February 2026BOD, 5-day, 20 deg. C, monthly average20.75 lb/d≤ 12.5 lb/d66%
February 2026BOD, 5-day, 20 deg. C, monthly average20.75 lb/d≤ 12.5 lb/d66%
February 2026BOD, 5-day, 20 deg. C, monthly average47.8 mg/L≤ 25 mg/L91%
February 2026BOD, 5-day, 20 deg. C, monthly average47.8 mg/L≤ 25 mg/L91%
February 2026BOD, 5-day, 20 deg. C, weekly average47.8 mg/L≤ 37.5 mg/L27%
February 2026BOD, 5-day, 20 deg. C, weekly average47.8 mg/L≤ 37.5 mg/L27%
February 2026E. coli, daily maximum7200 CFU/100mL≤ 2030 CFU/100mL255%
February 2026E. coli, daily maximum7200 CFU/100mL≤ 2030 CFU/100mL255%
February 2026E. coli, geometric mean1296 CFU/100mL≤ 630 CFU/100mL106%
February 2026E. coli, geometric mean1296 CFU/100mL≤ 630 CFU/100mL106%
March 2026BOD, 5-day, 20 deg. C, monthly average15.5 lb/d≤ 12.5 lb/d24%
March 2026BOD, 5-day, 20 deg. C, monthly average47.8 mg/L≤ 25 mg/L91%
March 2026BOD, 5-day, 20 deg. C, weekly average47.8 mg/L≤ 37.5 mg/L27%
March 2026E. coli, daily maximum7200 CFU/100mL≤ 2030 CFU/100mL255%
March 2026E. coli, geometric mean3569 CFU/100mL≤ 630 CFU/100mL467%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average11.2 mg/L≤ 10 mg/L12%
June 2026E. coli, daily maximum430 CFU/100mL≤ 406 CFU/100mL6%
September 2026E. coli, daily maximum520 CFU/100mL≤ 406 CFU/100mL28%

Limits in force (29)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/LJan, Feb, Mar, Nov, Dec
Oxygen, dissolved [DO]minimum≥ 3 mg/LJun–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 37.5 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 12.5 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≤ 90 mg/LJan, Feb, Mar, Nov, Dec
Solids, total suspendedweekly average≤ 22.5 mg/LApr–Oct
Solids, total suspendedweekly average≤ 135 mg/LJan, Feb, Mar, Nov, Dec
Solids, total suspendedmonthly average≤ 7.5 lb/dApr–Oct
Solids, total suspendedmonthly average≤ 45 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 8 mg/LApr, May
Nitrogen, ammonia total [as N]weekly average≤ 3 mg/LJun–Oct
Nitrogen, ammonia total [as N]weekly average≤ 12 mg/LApr, May
Nitrogen, ammonia total [as N]monthly average≤ 1 lb/dJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 4 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 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≤ 10 mg/LApr–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LApr–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 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/OK0034517 · MCP: https://passage-data.com/mcp