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City of Oakland

Sewage treatment plant, Oakland, Iowa. NPDES permit IA0033448, in force until Aug 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 (11 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

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

Period endingParameterReportedLimit
May 2026pH, daily maximum9.3≤ 9 SU

Limits in force (55)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6.1 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≤ 4.7 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 5.8 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 2.7 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 9.4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 2.8 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 4.3 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 4.5 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 3.1 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 4.5 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 9.1 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 3.1 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 4.7 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 5.8 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 9.4 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 3.2 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 4.3 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 4.5 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 4.5 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 21 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 3.3 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 85 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 105.1 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 48.5 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 170.1 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 51 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 78.4 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 82.2 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 56.1 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 82.2 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 165.7 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 56.1 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 46 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 85 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 105.1 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 70.3 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 170.1 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 58.1 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 78.4 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 82.2 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 56.1 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 82.2 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 382.2 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 56.1 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 60.3 lb/dAug
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

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/IA0033448 · MCP: https://passage-data.com/mcp