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City of Bankston

Sewage treatment plant, Bankston, Iowa. NPDES permit IA0071731 expired Sep 20, 2009; its limits still apply. 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 (14 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 8 required values missing, 0 of 12 reports late

Limits in force (58)

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≤ 1 lb/dall year
Solids, total suspended7-day average≤ 1.5 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 3.9 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 5.7 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 4.8 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 8.2 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 4.8 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 5.7 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 4.8 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 5.7 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 4.8 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 9.8 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 4.8 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 6.9 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 3.9 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 5.7 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 8.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 5.7 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 5.7 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 9.8 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 4.8 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 6.9 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ .13 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ .76 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ .16 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ .27 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ .16 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ .19 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ .16 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ .19 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ .16 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ .33 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ .16 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ .23 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ .13 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ .76 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ .16 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ .27 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ .16 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ .19 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ .16 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ .19 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ .16 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ .33 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ .16 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ .23 lb/dMar
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≤ .834 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 1.3 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/IA0071731 · MCP: https://passage-data.com/mcp