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City of Dudley

Sewage treatment plant, Dudley, Missouri. NPDES permit MO0102181 expired Mar 31, 2024; its limits still apply. Last 12 months: over a limit 38 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M monthly (14 values), outfall 001 form Q quarterly (2 values), outfall INF form IM monthly (2 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
33 values over a limit, 0 required values missing, 0 of 28 reports late

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

All 38 values over a limit
Period endingParameterReportedLimitOver by
October 2025E. coli, 30-day geometric mean1990≤ 206 #/100mL866%
October 2025E. coli, 7-day geometric mean1990≤ 1030 #/100mL93%
October 2025Solids, total suspended, monthly average46≤ 30 mg/L53%
October 2025Solids, total suspended, weekly average46≤ 45 mg/L2%
November 2025Nitrogen, ammonia total [as N], monthly average2.71≤ 2.7 mg/L0%
December 2025BOD, 5-day, 20 deg. C, monthly average33.5≤ 30 mg/L12%
December 2025Nitrogen, ammonia total [as N], monthly average3.64≤ 2.7 mg/L35%
December 2025Solids, total suspended, monthly average65≤ 30 mg/L117%
December 2025Solids, total suspended, weekly average65≤ 45 mg/L44%
January 2026Solids, suspended percent removal, monthly average minimum77≥ 85 %53%
January 2026Solids, total suspended, monthly average55≤ 30 mg/L83%
January 2026Solids, total suspended, weekly average55≤ 45 mg/L22%
February 2026BOD, 5-day, 20 deg. C, monthly average44.3≤ 30 mg/L48%
February 2026BOD, 5-day, percent removal, monthly average minimum51≥ 85 %227%
February 2026Nitrogen, ammonia total [as N], monthly average9.14≤ 2.7 mg/L239%
February 2026Solids, suspended percent removal, monthly average minimum58≥ 85 %180%
February 2026Solids, total suspended, monthly average62≤ 30 mg/L107%
February 2026Solids, total suspended, weekly average62≤ 45 mg/L38%
March 2026BOD, 5-day, 20 deg. C, monthly average63.9≤ 30 mg/L113%
March 2026BOD, 5-day, 20 deg. C, weekly average63.9≤ 45 mg/L42%
March 2026BOD, 5-day, percent removal, monthly average minimum75≥ 85 %67%
March 2026Nitrogen, ammonia total [as N], daily maximum12.5≤ 11.2 mg/L12%
March 2026Nitrogen, ammonia total [as N], monthly average12.5≤ 2.7 mg/L363%
March 2026Solids, suspended percent removal, monthly average minimum74≥ 85 %73%
March 2026Solids, total suspended, monthly average104≤ 30 mg/L247%
March 2026Solids, total suspended, weekly average104≤ 45 mg/L131%
April 2026Solids, total suspended, monthly average42≤ 30 mg/L40%
May 2026Nitrogen, ammonia total [as N], daily maximum5.78≤ 5.6 mg/L3%
May 2026Nitrogen, ammonia total [as N], monthly average5.78≤ 1.3 mg/L345%
May 2026Solids, total suspended, monthly average41≤ 30 mg/L37%
June 2026Nitrogen, ammonia total [as N], monthly average2.53≤ 1.3 mg/L95%
June 2026Solids, total suspended, monthly average42≤ 30 mg/L40%
July 2026Nitrogen, ammonia total [as N], monthly average3.97≤ 1.3 mg/L205%
August 2026E. coli, 30-day geometric mean870≤ 206 #/100mL322%
August 2026Nitrogen, ammonia total [as N], daily maximum7.35≤ 5.6 mg/L31%
August 2026Nitrogen, ammonia total [as N], monthly average7.35≤ 1.3 mg/L465%
August 2026Solids, total suspended, monthly average80≤ 30 mg/L167%
August 2026Solids, total suspended, weekly average80≤ 45 mg/L78%

Limits in force (20)

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≤ 5.6 mg/LApr–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 11.2 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LApr–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LJan, Feb, Mar, Oct, Nov, Dec001
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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0102181 · MCP: https://passage-data.com/mcp