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City of Pilot Grove

Sewage treatment plant, Pilot Grove, Missouri. NPDES permit MO0093076 expired Sep 30, 2024; its limits still apply. Last 12 months: over a limit 11 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form Q quarterly (14 values), outfall 001 form A yearly, outfall INF form A yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
15 values over a limit, 0 required values missing, 0 of 6 reports late

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

Period endingParameterReportedLimitOver by
December 2025E. coli, 30-day geometric mean> 2420≤ 206 #/100mL—
December 2025E. coli, 7-day geometric mean> 2420≤ 1030 #/100mL—
December 2025Nitrogen, ammonia total [as N], daily maximum45.7≤ 8 mg/L471%
December 2025Nitrogen, ammonia total [as N], monthly average45.7≤ 2.9 mg/L1476%
March 2026BOD, 5-day, 20 deg. C, monthly average33≤ 30 mg/L10%
March 2026Nitrogen, ammonia total [as N], daily maximum95.4≤ 8 mg/L1093%
March 2026Nitrogen, ammonia total [as N], monthly average95.4≤ 2.9 mg/L3190%
June 2026E. coli, 30-day geometric mean1120≤ 206 #/100mL444%
June 2026E. coli, 7-day geometric mean1120≤ 1030 #/100mL9%
June 2026Nitrogen, ammonia total [as N], daily maximum20.7≤ 3.5 mg/L491%
June 2026Nitrogen, ammonia total [as N], monthly average20.7≤ 1.4 mg/L1379%

Limits in force (20)

ParameterStatisticLimitMonthsOutfall
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≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 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≤ 8 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 3.5 mg/LApr–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LApr–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
E. coli7-day geometric mean≤ 1030 #/100mLApr–Dec001
E. coli30-day geometric mean≤ 206 #/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/MO0093076 · MCP: https://passage-data.com/mcp