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City of Moulton

Sewage treatment plant, Moulton, Iowa. NPDES permit IA0020851, in force until Jan 31, 2031. Last 12 months: no values over a limit, 10 required values missing, 2 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (10 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 2 required values missing, 0 of 12 reports late

Limits in force (54)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended30-day average≤ 80 mg/Lall year
Solids, total suspended7-day average≤ 120 mg/Lall year
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.7 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 2.3 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 8.4 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 4.7 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 2.7 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 19.9 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 48.3 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 56 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 21.6 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 24.7 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 35.1 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 22.1 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 14.3 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 15 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 18.6 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 32.9 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 13.5 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 48.3 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 55.1 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 119.2 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 66.9 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 45.4 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 55.1 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 37.6 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 45.5 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 37.6 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 45.5 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 37.6 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 37.6 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 282.1 lb/dJan
BOD, carbonaceous [5 day, 20 C]30-day average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 40 mg/Lall year

How strict are these limits?

Cited limits by parameter: Iowa'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/IA0020851 · MCP: https://passage-data.com/mcp