Passage Data · Check a report · Use it from your AI

Village of Cairo

Sewage treatment plant, Cairo, Missouri. NPDES permit MO0103390 expired Mar 31, 2022; its limits still apply. Last 12 months: over a limit 5 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (15 values), form W every 60 months
Last report on file
September 2026
Oct 2024 – Sep 2025
9 values over a limit, 0 required values missing, 0 of 4 reports late

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

Period endingParameterReportedLimitOver by
December 2025Solids, total suspended, monthly average155≤ 80 mg/L94%
December 2025Solids, total suspended, weekly average155≤ 120 mg/L29%
June 2026BOD, 5-day, percent removal, monthly average minimum9.55≥ 65 %158%
June 2026Solids, total suspended, monthly average125≤ 80 mg/L56%
June 2026Solids, total suspended, weekly average125≤ 120 mg/L4%

Limits in force (19)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cweekly average≤ 65 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year
pHminimum≥ 6.5 SUall year
Solids, total suspendedweekly average≤ 120 mg/Lall year
Solids, total suspendedmonthly average≤ 80 mg/Lall year
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 5.1 mg/LApr–Sep
Nitrogen, ammonia total [as N]daily maximum≤ 10.3 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≤ 2.7 mg/LJan, Feb, Mar, Oct, Nov, Dec
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. coli7-day geometric mean≤ 1030 #/100mLApr–Dec
E. coli30-day geometric mean≤ 206 #/100mLApr–Dec
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (toxic)all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (toxic)all year
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year
Solids, suspended percent removalmonthly average minimum≥ 65 %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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0103390 · MCP: https://passage-data.com/mcp