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City of Clarksburg

Sewage treatment plant, Clarksburg, Missouri. NPDES permit MO0109797, in force until Jul 31, 2030. Last 12 months: over a limit 4 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form Q quarterly (16 values), outfall INF form IQ quarterly (2 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
2 values over a limit, 2 required values missing, 5 of 8 reports late

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

Period endingParameterReportedLimitOver by
December 2025Nitrogen, ammonia total [as N], monthly average4.66≤ 2.8 mg/L66%
March 2026Solids, suspended percent removal, monthly average minimum56≥ 65 %26%
March 2026pH, maximum9.33≤ 9 SU—
June 2026Oil and grease [soxhlet extr.] tot., monthly average11.5≤ 10 mg/L15%

Limits in force (24)

ParameterStatisticLimitMonthsOutfall
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≤ 110 mg/Lall year001
Solids, total suspendedmonthly average≤ 70 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≤ 12.1 mg/LApr–Jun001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJan–Mar001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJul–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LOct–Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LApr–Jun001
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/LJan–Mar001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJul–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 2.8 mg/LOct–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. coliweekly average≤ 1030 #/100mLApr–Dec001
E. colimonthly average≤ 206 #/100mLApr–Dec001
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

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/MO0109797 · MCP: https://passage-data.com/mcp