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City of Winfield

Sewage treatment plant, Winfield, Missouri. NPDES permit MO0122050 expired Jun 30, 2024; its limits still apply. Last 12 months: no values over a limit, 24 required values missing, 3 of 4 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 28 days after each period: form Q quarterly (8 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 32 required values missing, 4 of 4 reports late

Limits in force (8)

Parameter	Statistic	Limit	Months
BOD, 5-day, 20 deg. C	weekly average	≤ 45 mg/L	all year
BOD, 5-day, 20 deg. C	monthly average	≤ 30 mg/L	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	weekly average	≤ 45 mg/L	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year

How strict are these limits?

Solids, total suspended, weekly average 45 mg/L — stricter than 39% of 631 other minor POTWs in Missouri; 38% have the same limit
Solids, total suspended, monthly average 30 mg/L — stricter than 38% of 639 other minor POTWs in Missouri; 37% have the same limit
BOD, 5-day, 20 deg. C, weekly average 45 mg/L — stricter than 38% of 623 other minor POTWs in Missouri; 38% have the same limit

Cited limits by parameter: Missouri'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/MO0122050 · MCP: https://passage-data.com/mcp