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Iowa Regional Utilities Association

Sanitary Services, Dows, Iowa. NPDES permit IA0077321, in force until Aug 31, 2030. Last 12 months: over a limit 2 times (last December 2025). 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
3 values over a limit, 0 required values missing, 1 of 12 reports late

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

Period endingParameterReportedLimitOver by
December 2025Nitrogen, ammonia total [as N], daily maximum5.306742≤ 3.7 lb/d43%
December 2025Nitrogen, ammonia total [as N], daily maximum6.3≤ 4 mg/L58%

Limits in force (58)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6.5 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
Nitrogen, ammonia total [as N]30-day average≤ 1.7 mg/LSep
Nitrogen, ammonia total [as N]30-day average≤ 1.6 mg/LJul
Nitrogen, ammonia total [as N]30-day average≤ 2.6 mg/LApr
Nitrogen, ammonia total [as N]30-day average≤ 2.2 mg/LJun
Nitrogen, ammonia total [as N]30-day average≤ 1.5 mg/LAug
Nitrogen, ammonia total [as N]30-day average≤ 4.1 mg/LMar
Nitrogen, ammonia total [as N]30-day average≤ 2.9 mg/LMay
Nitrogen, ammonia total [as N]30-day average≤ 5.4 mg/LJan
Nitrogen, ammonia total [as N]30-day average≤ 2.5 mg/LOct
Nitrogen, ammonia total [as N]30-day average≤ 2.8 mg/LNov
Nitrogen, ammonia total [as N]30-day average≤ 3.9 mg/LDec
Nitrogen, ammonia total [as N]30-day average≤ 6.2 mg/LFeb
Nitrogen, ammonia total [as N]daily maximum≤ 2.8 mg/LSep
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LJul
Nitrogen, ammonia total [as N]daily maximum≤ 4.9 mg/LApr
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LJun
Nitrogen, ammonia total [as N]daily maximum≤ 2.8 mg/LAug
Nitrogen, ammonia total [as N]daily maximum≤ 4.1 mg/LMar
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LMay
Nitrogen, ammonia total [as N]daily maximum≤ 20.2 mg/LJan
Nitrogen, ammonia total [as N]daily maximum≤ 2.8 mg/LOct
Nitrogen, ammonia total [as N]daily maximum≤ 2.8 mg/LNov
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/LDec
Nitrogen, ammonia total [as N]daily maximum≤ 8.7 mg/LFeb
Nitrogen, ammonia total [as N]30-day average≤ 1.5 lb/dSep
Nitrogen, ammonia total [as N]30-day average≤ 1.5 lb/dJul
Nitrogen, ammonia total [as N]30-day average≤ 2.4 lb/dApr
Nitrogen, ammonia total [as N]30-day average≤ 2 lb/dJun
Nitrogen, ammonia total [as N]30-day average≤ 1.4 lb/dAug
Nitrogen, ammonia total [as N]30-day average≤ 3.8 lb/dMar
Nitrogen, ammonia total [as N]30-day average≤ 2.7 lb/dMay
Nitrogen, ammonia total [as N]30-day average≤ 4.9 lb/dJan
Nitrogen, ammonia total [as N]30-day average≤ 2.3 lb/dOct
Nitrogen, ammonia total [as N]30-day average≤ 2.6 lb/dNov
Nitrogen, ammonia total [as N]30-day average≤ 3.6 lb/dDec
Nitrogen, ammonia total [as N]30-day average≤ 5.7 lb/dFeb
Nitrogen, ammonia total [as N]daily maximum≤ 2.6 lb/dSep
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 lb/dJul
Nitrogen, ammonia total [as N]daily maximum≤ 4.5 lb/dApr
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 lb/dJun
Nitrogen, ammonia total [as N]daily maximum≤ 2.6 lb/dAug
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 lb/dMar
Nitrogen, ammonia total [as N]daily maximum≤ 3.1 lb/dMay
Nitrogen, ammonia total [as N]daily maximum≤ 18.5 lb/dJan
Nitrogen, ammonia total [as N]daily maximum≤ 2.6 lb/dOct
Nitrogen, ammonia total [as N]daily maximum≤ 2.6 lb/dNov
Nitrogen, ammonia total [as N]daily maximum≤ 3.7 lb/dDec
Nitrogen, ammonia total [as N]daily maximum≤ 7.9 lb/dFeb
Chloride [as Cl]30-day average≤ 441 mg/Lall year
Chloride [as Cl]daily maximum≤ 638 mg/Lall year
Chloride [as Cl]30-day average≤ 404 lb/dall year
Chloride [as Cl]daily maximum≤ 585 lb/dall year
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

New limits from Aug 1, 2030

ParameterNew limitNew or tighterMedian, last 12 months× new limit
E. coli, geometric mean126 #/100mL (Mar–Nov)new——

How strict are these limits?

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

Same industry: the 8 Sanitary Services permits in Iowa.

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Your permit document is the final word. As JSON: /api/v1/permits/IA0077321 · MCP: https://passage-data.com/mcp