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Ottawa Co RWD#1 -Wyandotte

Sewage treatment plant, Wyandotte, Oklahoma. NPDES permit OK0028291, in force until May 31, 2031. Last 12 months: over a limit 3 times (last January 2026), 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (19 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 1 of 12 reports late

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

Period endingParameterReportedLimitOver by
January 2026Phosphorus, total [as P], monthly average10.7 mg/L≤ 2 mg/L435%
January 2026Phosphorus, total [as P], monthly average5.8 lb/d≤ 1.5 lb/d287%
January 2026Phosphorus, total [as P], weekly average10.7 mg/L≤ 3 mg/L257%

Limits in force (20)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/LJan, Feb, Mar, Apr, May, Jun, Nov, Dec
Oxygen, dissolved [DO]instantaneous minimum≥ 4 mg/LJul–Oct
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedweekly average≤ 22.5 mg/Lall year
Solids, total suspendedmonthly average≤ 22.5 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 3 lb/dall year
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year
Phosphorus, total [as P]weekly average≤ 1.5 mg/Lall year
Phosphorus, total [as P]monthly average≤ 1.5 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
E. coligeometric mean≤ 126 CFU/100mLMay–Sep
E. colidaily maximum≤ 235 CFU/100mLMay–Sep
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15 lb/dall year

How strict are these limits?

Cited limits by parameter: Oklahoma's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OK0028291 · MCP: https://passage-data.com/mcp