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Poweshiek Water Association

Sewage treatment plant, Watkins, Iowa. NPDES permit IA0079871, in force until Dec 31, 2030. 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 (23 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

Limits in force (67)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
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≤ 3.3 lb/dall year
Solids, total suspended7-day average≤ 4.9 lb/dall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspended30-day averagereport only (lb/d)all year
Solids, total suspendeddaily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]30-day average≤ 17.1 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 18.8 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 18.8 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 18.8 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 19.6 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 17.7 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 17.8 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 18.3 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 19.7 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 19.3 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 20.1 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 17.4 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 18.8 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 21.1 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 18.8 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 19.6 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 17.7 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 19.2 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 20 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 18.3 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 20.2 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 19.3 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 20.1 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 1.2 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 1.9 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 1.3 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 1.9 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 2 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 1.8 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 1.2 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 1.9 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.9 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 1.4 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 1.9 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 2 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 1.8 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 1.9 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 2.1 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 1.9 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 1.8 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 1.9 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 1.9 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 1.9 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dJan
E. coligeometric mean≤ 127 #/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≤ 2.7 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 4.3 lb/dall year

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/IA0079871 · MCP: https://passage-data.com/mcp