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City of Janesville

Sewage treatment plant, Janesville, Iowa. NPDES permit IA0026506, in force until Aug 31, 2031. Last 12 months: no values over a limit, 3 of 11 reports late. 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
1 value over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (17)

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
Solids, total suspended30-day average≤ 91 lb/dall year
Solids, total suspended7-day average≤ 136 lb/dall year
Nitrogen, total [as N]30-day average≤ 42.6 lb/dall year
Nitrogen, total [as N]daily maximum≤ 69.7 lb/dall year
Chlorine, total residual30-day average≤ .513 mg/Lall year
Chlorine, total residualdaily maximum≤ .513 mg/Lall year
Chlorine, total residual30-day average≤ .524 lb/dall year
Chlorine, total residualdaily maximum≤ .524 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≤ 28 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 45 lb/dall year

New limits from Sep 1, 2029

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, 30-day average0.35 lb/dtighter——
Chlorine, total residual, 30-day average0.41 mg/Ltighter——
Chlorine, total residual, daily maximum0.41 mg/Ltighter——
Chlorine, total residual, daily maximum0.35 lb/dtighter——

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0026506 · MCP: https://passage-data.com/mcp