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City of Windsor

Sewage treatment plant, Windsor, Missouri. NPDES permit MO0047325 expired Mar 31, 2026; its limits still apply. Last 12 months: over a limit 23 times (last August 2026), 2 required values missing, 6 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M monthly (18 values), outfall 001 form Q quarterly (6 values), outfall INF form IM monthly (2 values), outfall INF form IQ quarterly (8 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
12 values over a limit, 0 required values missing, 2 of 32 reports late

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

All 23 values over a limit
Period endingParameterReportedLimitOver by
October 2025pH, minimum0≥ 6.5 SU—
January 2026Solids, suspended percent removal, monthly average minimum59.9≥ 65 %15%
January 2026pH, maximum9.09≤ 9 SU—
February 2026pH, maximum9.36≤ 9 SU—
March 2026Nitrogen, ammonia total [as N], monthly average5.7805≤ 2.7 mg/L114%
March 2026Solids, suspended percent removal, monthly average minimum0≥ 65 %186%
March 2026pH, minimum5.66≥ 6.5 SU—
April 2026E. coli, 30-day geometric mean15543≤ 206 #/100mL7445%
April 2026E. coli, 7-day geometric mean20200≤ 1030 #/100mL1861%
April 2026Solids, suspended percent removal, monthly average minimum0≥ 65 %186%
April 2026pH, maximum9.4≤ 9 SU—
May 2026BOD, 5-day, 20 deg. C, monthly average46.5≤ 45 mg/L3%
May 2026BOD, 5-day, percent removal, monthly average minimum54.41≥ 65 %30%
May 2026E. coli, 30-day geometric mean1632≤ 206 #/100mL692%
May 2026E. coli, 7-day geometric mean1632≤ 1030 #/100mL58%
May 2026Oil and grease [soxhlet extr.] tot., daily maximum> 1.6≤ 15 mg/L—
May 2026Oil and grease [soxhlet extr.] tot., monthly average> 1.6≤ 10 mg/L—
May 2026Solids, suspended percent removal, monthly average minimum0≥ 65 %186%
June 2026E. coli, 30-day geometric mean1612≤ 206 #/100mL683%
June 2026E. coli, 7-day geometric mean1730≤ 1030 #/100mL68%
June 2026Solids, suspended percent removal, monthly average minimum17.98≥ 65 %134%
July 2026Nitrogen, ammonia total [as N], monthly average1.102≤ 1.1 mg/L0%
August 2026Solids, suspended percent removal, monthly average minimum11.6906475≥ 65 %152%

Limits in force (50)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year001
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cweekly average≤ 65 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 120 mg/Lall year001
Solids, total suspendedmonthly average≤ 80 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≤ 10.1 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LFeb, Mar, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJan, Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LJul001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LFeb, Mar, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.9 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 2.3 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/LJan, Nov001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJun001
Nitrogen, ammonia total [as N]monthly average≤ 2.6 mg/LOct001
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≥ 65 %all year001
Solids, suspended percent removalmonthly average minimum≥ 65 %all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
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

How strict are these limits?

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/MO0047325 · MCP: https://passage-data.com/mcp