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City of St. Joseph

Sewage treatment plant, St Joseph, Missouri. NPDES permit MO0023051 expired Mar 31, 2023; its limits still apply. Last 12 months: over a limit 6 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A quarterly (16 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 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 2025pH, minimum5.55≥ 6.5 SU—
June 2026E. coli, 30-day geometric mean502.67≤ 206 #/100mL144%
June 2026E. coli, 7-day geometric mean1773.13≤ 1030 #/100mL72%
June 2026Nitrogen, ammonia total [as N], daily maximum26.5≤ 5.3 mg/L400%
June 2026Nitrogen, ammonia total [as N], monthly average8.11≤ 1.3 mg/L524%
June 2026pH, minimum4.65≥ 6.5 SU—

Limits in force (18)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/Lall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedweekly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 5.3 mg/LApr–Sep
Nitrogen, ammonia total [as N]daily maximum≤ 10 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
Chlorine, total residualdaily maximum≤ 17 ug/LApr–Dec
Chlorine, total residualmonthly average≤ 8 ug/LApr–Dec
E. coli7-day geometric mean≤ 1030 #/100mLApr–Dec
E. coli30-day geometric mean≤ 206 #/100mLApr–Dec
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %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/MO0023051 · MCP: https://passage-data.com/mcp