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City of Winfield

Sewage treatment plant, Winfield, Missouri. NPDES permit MO0088676 expired Jun 30, 2024; its limits still apply. Last 12 months: over a limit 12 times (last August 2026), 3 of 20 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M monthly (16 values), outfall 001 form Q quarterly (6 values), outfall INF form IM quarterly (8 values), outfall SM1 form UM quarterly (8 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
37 values over a limit, 44 required values missing, 11 of 24 reports late

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

Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], monthly average2.2≤ 1.7 mg/L29%
November 2025Nitrogen, ammonia total [as N], monthly average1.78≤ 1.7 mg/L5%
December 2025Nitrogen, ammonia total [as N], monthly average1.91≤ 1.7 mg/L12%
December 2025pH, minimum5≥ 6.5 SU—
January 2026Solids, total suspended, monthly average34≤ 30 mg/L13%
April 2026BOD, 5-day, 20 deg. C, monthly average10.25≤ 10 mg/L3%
April 2026Nitrogen, ammonia total [as N], daily maximum.99≤ .8 mg/L24%
April 2026Nitrogen, ammonia total [as N], monthly average.99≤ .6 mg/L65%
May 2026Solids, suspended percent removal, monthly average minimum12≥ 85 %487%
May 2026Solids, total suspended, monthly average58≤ 30 mg/L93%
May 2026Solids, total suspended, weekly average58≤ 45 mg/L29%
August 2026Nitrogen, ammonia total [as N], monthly average.8≤ .6 mg/L33%

Limits in force (40)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 20 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year001
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 2.3 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ .8 mg/LApr–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .6 mg/LApr–Sep001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
E. coli7-day geometric mean≤ 1030 #/100mLApr–Oct001
E. coli30-day geometric mean≤ 206 #/100mLApr–Oct001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearINF
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all yearINF
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all yearINF
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearINF
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all yearINF
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearINF
Phosphorus, total [as P]daily maximumreport only (mg/L)all yearINF
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearINF
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearSM1
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all yearSM1
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all yearSM1
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearSM1
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all yearSM1
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearSM1
Phosphorus, total [as P]daily maximumreport only (mg/L)all yearSM1
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearSM1

How strict are these limits?

Cited limits by parameter: Missouri'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/MO0088676 · MCP: https://passage-data.com/mcp