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Sevig Utility Company

Civic And Social Associations, Shueyville, Iowa. NPDES permit IA0077992, in force until Feb 28, 2031. Last 12 months: over a limit once (last February 2026), 4 required values missing, 2 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (16 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 12 reports late

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

Period endingParameterReportedLimitOver by
February 2026Nitrogen, ammonia total [as N], 30-day average7.8≤ 4 mg/L95%

Limits in force (60)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 1 mg/Lall 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≤ 4.2 lb/dall year
Solids, total suspended7-day average≤ 6.3 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 1.1 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 1.7 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 1.3 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 2.3 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 3.4 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 17.8 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 16.6 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 14.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 15.8 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 15.8 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 15.3 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 16.4 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 14.6 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 14.8 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 15.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 14.7 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ .1 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ .1 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ .3 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ .6 lb/dFeb
Nitrogen, ammonia total [as N]30-day average≤ .2 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ .2 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ .2 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ .1 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ .2 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ .3 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ .5 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ .5 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 2.5 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 2.3 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 2.2 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 2.2 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 2.2 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 2.1 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 2.3 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 2.1 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 2.1 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 2.1 lb/dMar
E. coligeometric mean≤ 260 #/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≤ 3.5 lb/dall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 5.6 lb/dall year

New limits from Feb 1, 2031

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chloride [as Cl], 30-day average54.5 lb/dnew——
Chloride [as Cl], 30-day average389 mg/Lnew——
Chloride [as Cl], daily maximum629 mg/Lnew——
Chloride [as Cl], daily maximum88.1 lb/dnew——

How strict are these limits?

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

Same industry: the 24 Membership Organizations permits in Iowa.

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