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Iowa Association of Municipal Utilities

Political Organizations, Ankeny, Iowa. NPDES permit IA0075531, in force until May 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

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

Limits in force (59)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ .5 lb/dall year
Solids, total suspended7-day average≤ .7 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 1.4 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 3.5 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 3.5 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.8 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 2.4 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 15.1 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 15.5 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 16.2 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 15.8 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 13.3 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 14.5 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 11 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 13.2 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ .02 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ .05 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ .05 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ .02 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ .03 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ .02 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ .06 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ .04 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ .02 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ .02 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ .04 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ .02 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ .17 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ .2 lb/dSep
E. coligeometric mean≤ 126 #/100mLMar–Nov
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
BOD, carbonaceous [5 day, 20 C]30-day average≤ .4 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ .6 lb/dall year

How strict are these limits?

Cited limits by parameter: Iowa's rules and the federal ones.

Same industry: the 24 Membership Organizations permits in Iowa.

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Your permit document is the final word. As JSON: /api/v1/permits/IA0075531 · MCP: https://passage-data.com/mcp