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City of Freeburg

Sewage treatment plant, Freeburg, Missouri. NPDES permit MO0058220 expired Mar 31, 2024; its limits still apply. Last 12 months: over a limit 3 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form IM quarterly (2 values), form Q quarterly (16 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 4 of 8 reports late

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

Period endingParameterReportedLimitOver by
March 2026Nitrogen, ammonia total [as N], daily maximum21.5≤ 12.1 mg/L78%
March 2026Nitrogen, ammonia total [as N], monthly average21.5≤ 3 mg/L617%
June 2026Nitrogen, ammonia total [as N], monthly average3.1≤ 2.5 mg/L24%

Limits in force (20)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cweekly average≤ 65 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedweekly average≤ 110 mg/Lall year
Solids, total suspendedmonthly average≤ 70 mg/Lall year
Solids, total suspendedmonthly averagereport only (mg/L)all 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≤ 12.1 mg/LJan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LApr–Sep
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LJan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2.5 mg/LApr–Sep
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 meanreport only (#/100mL)Apr–Dec
E. coli30-day geometric meanreport only (#/100mL)Apr–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/MO0058220 · MCP: https://passage-data.com/mcp