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City of Warsaw

Sewage treatment plant, Warsaw, Missouri. NPDES permit MO0049239 expired Sep 30, 2021; its limits still apply. Last 12 months: over a limit 9 times (last August 2026), 2 required values missing, 1 of 26 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (12 values), form B quarterly (6 values), form R monthly (2 values), form WA every 60 months
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 28 reports late

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

Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], monthly average3.56≤ 2.7 mg/L32%
April 2026Solids, total suspended, monthly average26.6≤ 20 mg/L33%
April 2026Solids, total suspended, weekly average117≤ 30 mg/L290%
July 2026E. coli, 30-day geometric mean200.6≤ 126 #/100mL59%
July 2026E. coli, 7-day geometric mean632.5≤ 630 #/100mL0%
July 2026Nitrogen, ammonia total [as N], daily maximum7.3≤ 5.6 mg/L30%
July 2026Nitrogen, ammonia total [as N], monthly average4.097≤ 1.3 mg/L215%
August 2026Nitrogen, ammonia total [as N], daily maximum5.77≤ 5.6 mg/L3%
August 2026Nitrogen, ammonia total [as N], monthly average2.11≤ 1.3 mg/L62%

Limits in force (24)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedweekly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximum≤ 11.3 mg/LJan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 5.6 mg/LApr–Sep
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LJan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LApr–Sep
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. coli7-day geometric mean≤ 630 #/100mLApr–Oct
E. coli30-day geometric mean≤ 126 #/100mLApr–Oct
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (toxic)all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (toxic)all year

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/MO0049239 · MCP: https://passage-data.com/mcp