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City of Blairstown

Sewage treatment plant, Blairstown, Iowa. NPDES permit IA0030660, in force until Jul 31, 2029. 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 (26 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 2 of 12 reports late

Limits in force (70)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 4.1 mg/Lall year
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≥ 6.3 SUall year
pHdaily maximum≤ 9 SUall year
pH30-day averagereport only (SU)all year
pHdaily maximumreport only (SU)all year
Solids, total suspended30-day average≤ 80 mg/Lall year
Solids, total suspended7-day average≤ 120 mg/Lall year
Solids, total suspended30-day average≤ 414 lb/dall year
Solids, total suspended7-day average≤ 621 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≤ 27.8 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 7.9 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 28.6 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 19.4 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 12.6 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 10.9 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 8.3 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 14.4 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 20.6 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 32.7 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 8.8 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 13 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 42 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 34.6 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 62 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 28.8 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 30.8 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 35.1 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 35.1 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 35 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 54.8 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 28.8 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 28.8 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 38 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 10.7 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 38.6 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 26.3 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 17.1 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 14.8 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 11.3 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 19.6 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 28 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 44.4 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ 11.9 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 17.6 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 52.2 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 40.6 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 144 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 35.7 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 46.1 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 43.3 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 43.3 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 43.3 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 41.9 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 82.1 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 35.7 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 35.7 lb/dOct
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≤ 129 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 207 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

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