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City of Otterville

Sewage treatment plant, Otterville, Missouri. NPDES permit MO0101125, in force until Oct 31, 2030. Last 12 months: over a limit 14 times (last May 2026), 6 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M monthly (18 values), outfall INF form IM monthly (2 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
19 values over a limit, 0 required values missing, 9 of 25 reports late

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

All 14 values over a limit
Period endingParameterReportedLimitOver by
October 2025Solids, total suspended, monthly average31≤ 30 mg/L3%
December 2025Nitrogen, ammonia total [as N], monthly average6.2≤ 2.9 mg/L114%
January 2026Nitrogen, ammonia total [as N], daily maximum7.8≤ 6.2 mg/L26%
January 2026Nitrogen, ammonia total [as N], monthly average7.8≤ 2.9 mg/L169%
February 2026Nitrogen, ammonia total [as N], daily maximum10.1≤ 6.2 mg/L63%
February 2026Nitrogen, ammonia total [as N], monthly average10.1≤ 2.7 mg/L274%
March 2026Nitrogen, ammonia total [as N], daily maximum8.4≤ 6.2 mg/L35%
March 2026Nitrogen, ammonia total [as N], monthly average8.4≤ 2.9 mg/L190%
April 2026Nitrogen, ammonia total [as N], daily maximum5.2≤ 3.9 mg/L33%
April 2026Nitrogen, ammonia total [as N], monthly average5.2≤ 1.4 mg/L271%
May 2026Nitrogen, ammonia total [as N], monthly average1.6≤ 1.4 mg/L14%
May 2026Solids, total suspended, monthly average130≤ 80 mg/L63%
May 2026Solids, total suspended, weekly maximum130≤ 120 mg/L8%
May 2026pH, minimum5.5≥ 6.5 SU—

Limits in force (28)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimumreport only (mg/L)Apr–Oct001
Oxygen, dissolved [DO]monthly average minimumreport only (mg/L)Apr–Oct001
BOD, 5-day, 20 deg. Cweekly maximum≤ 65 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedweekly maximum≤ 120 mg/Lall year001
Solids, total suspendedmonthly average≤ 80 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≤ 3.9 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 6.2 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LApr, May, Jun, Jul, Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 6.2 mg/LJan, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 6.2 mg/LFeb001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 2.5 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LApr, May, Jun, Jul, Sep001
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LJan, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LFeb001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
E. coli7-day geometric mean≤ 630 #/100mLApr–Oct001
E. coli30-day geometric mean≤ 126 #/100mLApr–Oct001
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/MO0101125 · MCP: https://passage-data.com/mcp