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City of Clarkton

Sewage treatment plant, Clarkton, Missouri. NPDES permit MO0052663, in force until Jun 30, 2027. Last 12 months: over a limit 15 times (last August 2026), 46 required values missing, 13 of 29 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 monthly (2 values), outfall INF form IQ quarterly (8 values), outfall 001 form WA every 60 months
Renewal application due
Jan 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
37 values over a limit, 30 required values missing, 10 of 32 reports late

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

All 15 values over a limit
Period endingParameterReportedLimitOver by
October 2025E. coli, 30-day geometric mean1200≤ 206 #/100mL483%
October 2025E. coli, 7-day geometric mean1200≤ 1030 #/100mL17%
October 2025Solids, total suspended, monthly average64≤ 30 mg/L113%
October 2025Solids, total suspended, weekly average64≤ 45 mg/L42%
January 2026Solids, suspended percent removal, monthly average minimum17≥ 85 %453%
January 2026Solids, total suspended, monthly average60≤ 30 mg/L100%
January 2026Solids, total suspended, weekly average60≤ 45 mg/L33%
February 2026BOD, 5-day, 20 deg. C, monthly average68.6≤ 30 mg/L129%
February 2026BOD, 5-day, 20 deg. C, weekly average68.6≤ 45 mg/L52%
February 2026BOD, 5-day, percent removal, monthly average minimum80.7≥ 85 %29%
February 2026Nitrogen, ammonia total [as N], daily maximum26.8≤ 17 mg/L58%
February 2026Nitrogen, ammonia total [as N], monthly average26.8≤ 3.9 mg/L587%
March 2026Solids, total suspended, weekly average276≤ 45 mg/L513%
August 2026E. coli, 30-day geometric mean1050≤ 206 #/100mL410%
August 2026E. coli, 7-day geometric mean1050≤ 1030 #/100mL2%

Limits in force (48)

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 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 maximumreport only (mg/L)all year001
Oil and grease [soxhlet extr.] tot.monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximum≤ 14.4 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 14.4 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 14.4 mg/LJun, Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 23 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 14.4 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/LJan, Feb, Mar, Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 2.8 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 3.5 mg/LDec001
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LJun, Sep001
Nitrogen, ammonia total [as N]monthly average≤ 1.2 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LJul001
Nitrogen, ammonia total [as N]monthly average≤ 3.9 mg/LJan, Feb, Mar, Nov001
Nitrogen, ammonia total [as N]monthly average≤ 2 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
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (toxic)all year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (toxic)all year001
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
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/MO0052663 · MCP: https://passage-data.com/mcp