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Heavener Utilities Authority

Sewage treatment plant, Heavener, Oklahoma. NPDES permit OK0038407 expired Aug 31, 2026; its limits still apply. Last 12 months: over a limit 2 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (20 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], weekly average11.6 mg/L≤ 7.5 mg/L55%
August 2026E. coli, daily maximum1986.3 MPN/100mL≤ 406 CFU/100mL389%

Limits in force (35)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 5 mg/LJun–Oct
Oxygen, dissolved [DO]minimum≥ 6 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
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≤ 83.4 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≤ 62.6 lb/dApr–Oct
Solids, total suspendedmonthly average≤ 125.1 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 7 mg/LApr, May
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LJun–Oct
Nitrogen, ammonia total [as N]weekly average≤ 10.5 mg/LApr, May
Nitrogen, ammonia total [as N]weekly average≤ 7.5 mg/LJun–Oct
Nitrogen, ammonia total [as N]monthly average≤ 29.2 lb/dApr, May
Nitrogen, ammonia total [as N]monthly average≤ 20.9 lb/dJun–Oct
Phosphorus, total [as P]monthly average≤ 2 mg/Lall year
Phosphorus, total [as P]weekly average≤ 3 mg/Lall year
Phosphorus, total [as P]monthly average≤ 8.34 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 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/LJun–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 12 mg/LApr, May
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LJun–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 18 mg/LApr, May
BOD, carbonaceous [5 day, 20 C]monthly average≤ 41.7 lb/dJun–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 50 lb/dApr, May

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/OK0038407 · MCP: https://passage-data.com/mcp