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Landmarc Estates Property

Sewerage Systems, Ridgedale, Missouri. NPDES permit MO0118796, in force until Jan 31, 2031. Last 12 months: over a limit 3 times (last December 2025), 2 of 3 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 4 reports late

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

Period endingParameterReportedLimitOver by
December 2025BOD, 5-day, 20 deg. C, monthly average20≤ 10 mg/L100%
December 2025BOD, 5-day, 20 deg. C, weekly average20≤ 15 mg/L33%
December 2025Nitrogen, ammonia total [as N], monthly average9.46≤ 2.8 mg/L238%

Limits in force (20)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimumreport only (mg/L)Apr–Dec
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)Apr–Dec
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedweekly average≤ 20 mg/Lall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 5.7 mg/LApr–Sep
Nitrogen, ammonia total [as N]daily maximum≤ 9.8 mg/LJan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LApr–Sep
Nitrogen, ammonia total [as N]monthly average≤ 2.8 mg/LJan, Feb, Mar, Oct, Nov, Dec
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Chlorine, total residualdaily maximum≤ 17 ug/LApr–Dec
Chlorine, total residualmonthly average≤ 8 ug/LApr–Dec
E. colidaily maximum≤ 126 #/100mLall year
E. colimonthly averagereport only (#/100mL)all year

How strict are these limits?

Cited limits by parameter: Missouri's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0118796 · MCP: https://passage-data.com/mcp