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The Labadie Creek Watershed Sewer

Sewage treatment plant, Gray Summit, Missouri. NPDES permit MO0098981 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit 42 times (last September 2026), 2 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M monthly (16 values), outfall INF form IM monthly (2 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
45 values over a limit, 36 required values missing, 14 of 24 reports late

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

All 42 values over a limit
Period endingParameterReportedLimitOver by
October 2025E. coli, 30-day geometric mean3400≤ 206 #/100mL1550%
October 2025E. coli, 7-day geometric mean3400≤ 1030 #/100mL230%
October 2025Nitrogen, ammonia total [as N], daily maximum38.43≤ 8.4 mg/L358%
October 2025Nitrogen, ammonia total [as N], monthly average38.43≤ 1.8 mg/L2035%
November 2025Nitrogen, ammonia total [as N], daily maximum38.77≤ 8.4 mg/L362%
November 2025Nitrogen, ammonia total [as N], monthly average38.77≤ 2.4 mg/L1515%
December 2025Nitrogen, ammonia total [as N], daily maximum45.97≤ 10.1 mg/L355%
December 2025Nitrogen, ammonia total [as N], monthly average45.97≤ 2.7 mg/L1603%
January 2026Nitrogen, ammonia total [as N], daily maximum39.25≤ 12.1 mg/L224%
January 2026Nitrogen, ammonia total [as N], monthly average39.25≤ 3.1 mg/L1166%
January 2026Solids, suspended percent removal, monthly average minimum63≥ 65 %6%
February 2026Nitrogen, ammonia total [as N], daily maximum34.47≤ 12.1 mg/L185%
February 2026Nitrogen, ammonia total [as N], monthly average34.47≤ 3.1 mg/L1012%
February 2026Solids, suspended percent removal, monthly average minimum51≥ 65 %40%
March 2026BOD, 5-day, percent removal, monthly average minimum57≥ 65 %23%
March 2026Nitrogen, ammonia total [as N], daily maximum23.86≤ 10.1 mg/L136%
March 2026Nitrogen, ammonia total [as N], monthly average23.86≤ 2.7 mg/L784%
March 2026Solids, suspended percent removal, monthly average minimum0≥ 65 %186%
March 2026Solids, total suspended, monthly average106.7≤ 80 mg/L33%
April 2026E. coli, 30-day geometric mean500≤ 206 #/100mL143%
April 2026Nitrogen, ammonia total [as N], daily maximum14.86≤ 8.4 mg/L77%
April 2026Nitrogen, ammonia total [as N], monthly average14.86≤ 2.1 mg/L608%
April 2026Oil and grease [soxhlet extr.] tot., monthly average14.8≤ 10 mg/L48%
May 2026Solids, suspended percent removal, monthly average minimum45≥ 65 %57%
May 2026Solids, total suspended, monthly average101≤ 80 mg/L26%
May 2026pH, maximum10.16≤ 9 SU—
June 2026E. coli, 30-day geometric mean10300≤ 206 #/100mL4900%
June 2026E. coli, 7-day geometric mean10300≤ 1030 #/100mL900%
June 2026Nitrogen, ammonia total [as N], monthly average1.8≤ 1.3 mg/L38%
June 2026Solids, suspended percent removal, monthly average minimum63≥ 65 %6%
July 2026E. coli, 30-day geometric mean1400≤ 206 #/100mL580%
July 2026E. coli, 7-day geometric mean1400≤ 1030 #/100mL36%
July 2026Nitrogen, ammonia total [as N], daily maximum9.58≤ 8.4 mg/L14%
July 2026Nitrogen, ammonia total [as N], monthly average9.58≤ .9 mg/L964%
August 2026E. coli, 30-day geometric mean1700≤ 206 #/100mL725%
August 2026E. coli, 7-day geometric mean1700≤ 1030 #/100mL65%
August 2026Nitrogen, ammonia total [as N], daily maximum16.1≤ 8.4 mg/L92%
August 2026Nitrogen, ammonia total [as N], monthly average16.1≤ .9 mg/L1689%
September 2026E. coli, 30-day geometric mean5300≤ 206 #/100mL2473%
September 2026E. coli, 7-day geometric mean5300≤ 1030 #/100mL415%
September 2026Nitrogen, ammonia total [as N], daily maximum25.57≤ 8.4 mg/L204%
September 2026Nitrogen, ammonia total [as N], monthly average25.57≤ 1.2 mg/L2031%

Limits in force (34)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 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 average≤ 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≤ 8.4 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LMar, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LJul, Aug001
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJan, Feb001
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LMar, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 2.1 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ .9 mg/LJul, Aug001
Nitrogen, ammonia total [as N]monthly average≤ 1.2 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LJun001
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/LJan, Feb001
Nitrogen, ammonia total [as N]monthly average≤ 2.4 mg/LNov001
Nitrogen, ammonia total [as N]monthly average≤ 2.1 mg/LMay001
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–Oct001
E. coli30-day geometric mean≤ 206 #/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/MO0098981 · MCP: https://passage-data.com/mcp