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Liberty Hills Reorganized Common Sewer

Sewage treatment plant, Liberty, Missouri. NPDES permit MO0081531, in force until Jan 31, 2029. Last 12 months: over a limit 10 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form Q quarterly (14 values), outfall INF form IQ quarterly (2 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 8 reports late

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

Period endingParameterReportedLimitOver by
December 2025E. coli, 30-day geometric mean57900≤ 206 #/100mL28007%
December 2025E. coli, 7-day geometric mean57900≤ 1030 #/100mL5521%
March 2026Nitrogen, ammonia total [as N], daily maximum18.6≤ 12.1 mg/L54%
March 2026Nitrogen, ammonia total [as N], monthly average18.6≤ 3.1 mg/L500%
June 2026E. coli, 30-day geometric mean> 241960≤ 206 #/100mL—
June 2026E. coli, 7-day geometric mean> 241960≤ 1030 #/100mL—
June 2026Nitrogen, ammonia total [as N], daily maximum22.5≤ 12.1 mg/L86%
June 2026Nitrogen, ammonia total [as N], monthly average22.5≤ 2 mg/L1025%
June 2026Solids, suspended percent removal, monthly average minimum83≥ 85 %13%
June 2026Solids, total suspended, monthly average38≤ 30 mg/L27%

Limits in force (22)

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
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LOct–Dec001
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]monthly average≤ 2.9 mg/LOct–Dec001
Nitrogen, ammonia total [as N]monthly average≤ 2 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
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–Dec001
E. coli30-day geometric mean≤ 206 #/100mLApr–Dec001
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/MO0081531 · MCP: https://passage-data.com/mcp