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City of Walker

Sewage treatment plant, Walker, Missouri. NPDES permit MO0103942, in force until Oct 31, 2027. Last 12 months: over a limit 7 times (last August 2026), 2 of 22 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)
Renewal application due
May 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 2 of 24 reports late

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

Period endingParameterReportedLimitOver by
May 2026Nitrogen, ammonia total [as N], monthly average2≤ 1.9 mg/L5%
July 2026E. coli, 30-day geometric mean1081≤ 206 #/100mL425%
July 2026E. coli, 7-day geometric mean1081≤ 1030 #/100mL5%
July 2026Solids, suspended percent removal, monthly average minimum40≥ 65 %71%
August 2026E. coli, 30-day geometric mean1081≤ 206 #/100mL425%
August 2026E. coli, 7-day geometric mean1081≤ 1030 #/100mL5%
August 2026Solids, suspended percent removal, monthly average minimum40≥ 65 %71%

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.median≤ 10 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LFeb, Mar, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJan, Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJun001
Nitrogen, ammonia total [as N]monthly average≤ 1.9 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 2.6 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LFeb, Mar, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/LJan, Nov001
Nitrogen, ammonia total [as N]monthly average≤ 2.3 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LJul001
Nitrogen, ammonia total [as N]median≤ 1.5 mg/LJun001
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/MO0103942 · MCP: https://passage-data.com/mcp