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City of Conway

Sewage treatment plant, Conway, Missouri. NPDES permit MO0031674 expired Dec 31, 2023; its limits still apply. Last 12 months: over a limit 19 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (12 values), form Q quarterly (2 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
24 values over a limit, 0 required values missing, 1 of 16 reports late

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

All 19 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], monthly average3.76≤ 2.8 mg/L34%
October 2025Solids, suspended percent removal, monthly average minimum82≥ 85 %20%
October 2025Solids, total suspended, monthly average60≤ 30 mg/L100%
October 2025pH, maximum9.6≤ 9 SU—
November 2025BOD, 5-day, 20 deg. C, monthly average42≤ 30 mg/L40%
November 2025Nitrogen, ammonia total [as N], monthly average8.77≤ 2.8 mg/L213%
November 2025Solids, total suspended, monthly average49≤ 30 mg/L63%
December 2025Nitrogen, ammonia total [as N], daily maximum10.1≤ 9.8 mg/L3%
December 2025Nitrogen, ammonia total [as N], monthly average10.1≤ 2.8 mg/L261%
January 2026BOD, 5-day, 20 deg. C, monthly average33≤ 30 mg/L10%
January 2026BOD, 5-day, percent removal, monthly average minimum76≥ 85 %60%
January 2026Nitrogen, ammonia total [as N], daily maximum10.4≤ 9.8 mg/L6%
January 2026Nitrogen, ammonia total [as N], monthly average10.4≤ 2.8 mg/L271%
January 2026Solids, suspended percent removal, monthly average minimum84≥ 85 %7%
February 2026Nitrogen, ammonia total [as N], monthly average5.55≤ 2.8 mg/L98%
April 2026Solids, total suspended, monthly average35≤ 30 mg/L17%
May 2026Solids, total suspended, monthly average43≤ 30 mg/L43%
August 2026Solids, suspended percent removal, monthly average minimum84≥ 85 %7%
August 2026Solids, total suspended, monthly average35≤ 30 mg/L17%

Limits in force (16)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall 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≤ 9.8 mg/LJan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 5.9 mg/LApr–Sep
Nitrogen, ammonia total [as N]monthly average≤ 2.8 mg/LJan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LApr–Sep
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %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/MO0031674 · MCP: https://passage-data.com/mcp