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Wynnewood Utilities Authority

Sewage treatment plant, Wynnewood, Oklahoma. NPDES permit OK0028282 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 7 times (last August 2026), 11 required values missing, 3 of 12 reports late. 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: 1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period ending	Parameter	Reported	Limit	Over by
November 2025	BOD, 5-day, 20 deg. C, monthly average	35.53 mg/L	≤ 30 mg/L	18%
November 2025	BOD, 5-day, 20 deg. C, weekly average	51.9 mg/L	≤ 45 mg/L	15%
December 2025	BOD, 5-day, 20 deg. C, weekly average	56.6 mg/L	≤ 45 mg/L	26%
March 2026	Solids, total suspended, weekly average	53.3 mg/L	≤ 45 mg/L	18%
May 2026	E. coli, daily maximum	2420 MPN/100mL	≤ 406 MPN/100mL	496%
June 2026	E. coli, daily maximum	2420 MPN/100mL	≤ 406 MPN/100mL	496%
August 2026	Chlorine, total residual, instantaneous maximum	2.5 mg/L	≤ .099 mg/L	2425%

Limits in force (13)

Parameter	Statistic	Limit	Months
BOD, 5-day, 20 deg. C	monthly average	≤ 30 mg/L	all year
BOD, 5-day, 20 deg. C	weekly average	≤ 45 mg/L	all year
BOD, 5-day, 20 deg. C	monthly average	≤ 187.7 lb/d	all year
pH	minimum	≥ 6.5 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Solids, total suspended	weekly average	≤ 45 mg/L	all year
Solids, total suspended	monthly average	≤ 187.7 lb/d	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Chlorine, total residual	instantaneous maximum	≤ .099 mg/L	all year
E. coli	geometric mean	≤ 126 MPN/100mL	May–Sep
E. coli	daily maximum	≤ 406 MPN/100mL	May–Sep

How strict are these limits?

Solids, total suspended, monthly average 30 mg/L — stricter than 44% of 176 other minor POTWs in Oklahoma; 34% have the same limit
Solids, total suspended, weekly average 45 mg/L — stricter than 44% of 171 other minor POTWs in Oklahoma; 34% have the same limit

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/OK0028282 · MCP: https://passage-data.com/mcp