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West Des Moines Water Works

Water Supply, West Des Moines, Iowa. NPDES permit IA0053682, in force until Jul 31, 2030. Last 12 months: over a limit 4 times (last June 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (7 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 2 reports late

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

Period endingParameterReportedLimitOver by
May 2026Chlorine, total residual, 30-day average.23869≤ .071 lb/d236%
May 2026Chlorine, total residual, daily maximum.23869≤ .122 lb/d96%
June 2026Chlorine, total residual, 30-day average.238607≤ .071 lb/d236%
June 2026Chlorine, total residual, daily maximum.238607≤ .122 lb/d96%

Limits in force (7)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Nitrogen, nitrate total [as N]daily maximum≤ 9.5 mg/Lall year
Chlorine, total residual30-day average≤ .017 mg/Lall year
Chlorine, total residualdaily maximum≤ .029 mg/Lall year
Chlorine, total residual30-day average≤ .071 lb/dall year
Chlorine, total residualdaily maximum≤ .122 lb/dall year

How strict are these limits?

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

Same industry: the 48 Water Supply permits in Iowa.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0053682 · MCP: https://passage-data.com/mcp