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City of Arcadia

Sewage treatment plant, Arcadia, Missouri. NPDES permit MO0050687 expired Sep 30, 2021; its limits still apply. Last 12 months: over a limit 15 times (last August 2026), 5 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (13 values), form R quarterly (2 values), form W every 60 months
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 16 reports late

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

All 15 values over a limit
Period endingParameterReportedLimitOver by
January 2026Nitrogen, ammonia total [as N], daily maximum14≤ 12.5 mg/L12%
February 2026Nitrogen, ammonia total [as N], daily maximum15≤ 12.5 mg/L20%
April 2026BOD, 5-day, 20 deg. C, monthly average49≤ 45 mg/L9%
April 2026Nitrogen, ammonia total [as N], monthly average6.9≤ 3.9 mg/L77%
June 2026BOD, 5-day, 20 deg. C, monthly average155≤ 45 mg/L244%
June 2026BOD, 5-day, 20 deg. C, weekly average155≤ 65 mg/L138%
June 2026E. coli, 30-day geometric mean3080≤ 206 #/100mL1395%
June 2026E. coli, 7-day geometric mean3080≤ 1030 #/100mL199%
June 2026Solids, total suspended, monthly average220≤ 80 mg/L175%
June 2026Solids, total suspended, weekly average220≤ 120 mg/L83%
June 2026pH, minimum6.17≥ 6.5 SU—
July 2026E. coli, 30-day geometric mean3080≤ 206 #/100mL1395%
July 2026E. coli, 7-day geometric mean3080≤ 1030 #/100mL199%
August 2026Nitrogen, ammonia total [as N], monthly average5.2≤ 3.9 mg/L33%
August 2026Solids, total suspended, monthly average86≤ 80 mg/L8%

Limits in force (19)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cweekly average≤ 65 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHminimum≥ 6.5 SUall year
Solids, total suspendedweekly average≤ 120 mg/Lall year
Solids, total suspendedmonthly average≤ 80 mg/Lall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 12.5 mg/LApr–Sep
Nitrogen, ammonia total [as N]daily maximum≤ 12.5 mg/LJan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 3.9 mg/LApr–Sep
Nitrogen, ammonia total [as N]monthly average≤ 4.2 mg/LJan, Feb, Mar, Oct, Nov, Dec
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. coli7-day geometric mean≤ 1030 #/100mLApr–Oct
E. coli30-day geometric mean≤ 206 #/100mLApr–Oct
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (toxic)all year
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (toxic)all year

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/MO0050687 · MCP: https://passage-data.com/mcp