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City of Wellington

Sewage treatment plant, Wellington, Missouri. NPDES permit MO0041165, in force until Jun 30, 2031. Last 12 months: over a limit 48 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M monthly (16 values), outfall INF form IM monthly (2 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
21 values over a limit, 0 required values missing, 0 of 12 reports late

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

All 48 values over a limit
Period endingParameterReportedLimitOver by
October 2025E. coli, 30-day geometric mean325.5≤ 206 #/100mL58%
October 2025Nitrogen, ammonia total [as N], monthly average5.55≤ 2.4 mg/L131%
October 2025Solids, suspended percent removal, monthly average minimum56≥ 85 %193%
October 2025Solids, total suspended, monthly average110≤ 30 mg/L267%
October 2025Solids, total suspended, weekly average110≤ 45 mg/L144%
November 2025BOD, 5-day, 20 deg. C, monthly average77≤ 30 mg/L157%
November 2025BOD, 5-day, 20 deg. C, weekly average77≤ 45 mg/L71%
November 2025BOD, 5-day, percent removal, monthly average minimum81≥ 85 %27%
November 2025Nitrogen, ammonia total [as N], monthly average10.9≤ 2.4 mg/L354%
November 2025Solids, suspended percent removal, monthly average minimum60≥ 85 %167%
November 2025Solids, total suspended, monthly average107≤ 30 mg/L257%
November 2025Solids, total suspended, weekly average107≤ 45 mg/L138%
January 2026BOD, 5-day, 20 deg. C, monthly average34≤ 30 mg/L13%
January 2026Nitrogen, ammonia total [as N], daily maximum16.6≤ 12.1 mg/L37%
January 2026Nitrogen, ammonia total [as N], monthly average16.6≤ 2.4 mg/L592%
January 2026Solids, suspended percent removal, monthly average minimum80≥ 85 %33%
January 2026Solids, total suspended, monthly average48≤ 30 mg/L60%
January 2026Solids, total suspended, weekly average48≤ 45 mg/L7%
February 2026BOD, 5-day, 20 deg. C, monthly average34≤ 30 mg/L13%
February 2026Nitrogen, ammonia total [as N], daily maximum21.2≤ 12.1 mg/L75%
February 2026Nitrogen, ammonia total [as N], monthly average20.5≤ 2.4 mg/L754%
February 2026Solids, total suspended, monthly average32≤ 30 mg/L7%
March 2026BOD, 5-day, 20 deg. C, monthly average38≤ 30 mg/L27%
March 2026BOD, 5-day, percent removal, monthly average minimum73≥ 85 %80%
March 2026Nitrogen, ammonia total [as N], daily maximum16.7≤ 12.1 mg/L38%
March 2026Nitrogen, ammonia total [as N], monthly average16.7≤ 2.4 mg/L596%
March 2026Solids, suspended percent removal, monthly average minimum50≥ 85 %233%
March 2026Solids, total suspended, monthly average57≤ 30 mg/L90%
March 2026Solids, total suspended, weekly average57≤ 45 mg/L27%
April 2026Solids, suspended percent removal, monthly average minimum79≥ 85 %40%
April 2026Solids, total suspended, monthly average68≤ 30 mg/L127%
April 2026Solids, total suspended, weekly average68≤ 45 mg/L51%
April 2026pH, maximum9.13≤ 9 SU—
May 2026BOD, 5-day, 20 deg. C, monthly average77≤ 30 mg/L157%
May 2026BOD, 5-day, 20 deg. C, weekly average77≤ 45 mg/L71%
May 2026BOD, 5-day, percent removal, monthly average minimum15≥ 85 %467%
May 2026E. coli, 30-day geometric mean461.1≤ 206 #/100mL124%
May 2026Solids, suspended percent removal, monthly average minimum35≥ 85 %333%
May 2026Solids, total suspended, monthly average72≤ 30 mg/L140%
May 2026Solids, total suspended, weekly average72≤ 45 mg/L60%
May 2026pH, maximum9.07≤ 9 SU—
June 2026Nitrogen, ammonia total [as N], monthly average1.89≤ 1.3 mg/L45%
June 2026Solids, suspended percent removal, monthly average minimum78≥ 85 %47%
June 2026Solids, total suspended, monthly average44≤ 30 mg/L47%
July 2026E. coli, 30-day geometric mean344.8≤ 206 #/100mL67%
July 2026Nitrogen, ammonia total [as N], monthly average2.86≤ .8 mg/L258%
July 2026Solids, total suspended, monthly average54≤ 30 mg/L80%
July 2026Solids, total suspended, weekly average54≤ 45 mg/L20%

Limits in force (28)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 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≤ 5.1 mg/LJun, Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 5.1 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 5.1 mg/LApr, May001
Nitrogen, ammonia total [as N]daily maximum≤ 5.1 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 6.9 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LJun, Aug001
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LJul001
Nitrogen, ammonia total [as N]monthly average≤ 2.4 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LApr, May001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LOct001
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
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly 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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Your permit document is the final word. As JSON: /api/v1/permits/MO0041165 · MCP: https://passage-data.com/mcp