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Public Water Supply District No. One (1)

Sewage treatment plant, Fortuna, Missouri. NPDES permit MO0131539 expired Mar 31, 2025; its limits still apply. Last 12 months: over a limit 3 times (last March 2026), 2 of 6 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form Q quarterly (19 values), outfall INF form IQ quarterly (2 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value 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 2025BOD, 5-day, percent removal, monthly average minimum31≥ 65 %97%
December 2025Solids, suspended percent removal, monthly average minimum0≥ 65 %186%
March 2026BOD, 5-day, percent removal, monthly average minimum0≥ 65 %186%

Limits in force (23)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimumreport only (mg/L)Apr–Dec001
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)Apr–Dec001
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≤ 110 mg/Lall year001
Solids, total suspendedmonthly average≤ 70 mg/Lall year001
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year001
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJan–Mar001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LOct–Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Apr–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
Chlorine, total residualdaily maximum≤ 18 ug/LApr–Dec001
Chlorine, total residualmonthly average≤ 9 ug/LApr–Dec001
E. coli7-day geometric mean≤ 630 #/100mLApr–Dec001
E. coli30-day geometric mean≤ 126 #/100mLApr–Dec001
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year001
Solids, suspended percent removalmonthly average minimum≥ 65 %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/MO0131539 · MCP: https://passage-data.com/mcp