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Iowa Lakes Regional Water

Sewage treatment plant, Dolliver, Iowa. NPDES permit IA0082147, in force until Oct 31, 2030. Last 12 months: over a limit once (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (17 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
May 2026Nitrogen, nitrate total [as N], 30-day average4.145563≤ 3.95 lb/d5%

Limits in force (61)

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≤ 2 lb/dall year
Solids, total suspended7-day average≤ 3 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 7.9 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 17.1 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 12.5 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 17.5 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 17.8 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 18 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 16.5 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 18.1 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 7.4 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 8.1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 6.9 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 10.5 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 18.6 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 17.1 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 17.5 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 17.5 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 17.8 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 16.5 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 18.1 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 19.7 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 16.2 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ .4 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ .9 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ .7 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 1.1 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ .9 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 1.2 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 1.1 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 1.2 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ .4 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ .4 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ .4 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ .6 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 1.2 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 1.1 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 1.1 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 1.1 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 1.2 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 1.2 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 1.1 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 1.2 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 1.2 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 1.3 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 1.1 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 1.1 lb/dMay
Nitrogen, nitrate total [as N]30-day average≤ 3.95 lb/dall year
Nitrogen, nitrate total [as N]daily maximum≤ 6.466 lb/dall year
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≤ 1.7 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 2.7 lb/dall 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/IA0082147 · MCP: https://passage-data.com/mcp