STATE REPORT IA 10 ALERTS 9 HEALTH VIOLATIONS

Iowa Water Quality & Safety Report

41 ZIP codes · 94 water systems · IPC plumbing code · Updated 2026-03-16

Data: EPA SDWIS, NWS, State plumbing boards, Rewiring America Last verified: 2026-03-16

41
ZIP Codes
94
Water Systems
25
ZIPs with Violations
10
Active Alerts
IPC
Plumbing Code

Overview

We track water quality, weather alerts, plumbing regulations, and energy rebates for 41 ZIP codes across Iowa, covering 94 community water systems that serve approximately 1,331,712 people.

25 of 41 ZIP codes (61%) have recorded EPA violations. 9 health-based violations have been documented.

Active Weather Alerts

10 active alerts in Iowa including 10 warnings. Severe weather can directly affect tap water quality — flooding, power outages, and infrastructure damage may lead to boil-water advisories.

AlertSeverityAreas
Blizzard WarningExtremeJackson; Clinton; Scott; Jo Daviess; Stephenson; Carroll;…
Blizzard WarningExtremeMitchell; Howard; Floyd; Chickasaw
Blizzard WarningExtremeWinneshiek; Allamakee; Fayette; Clayton
Blizzard WarningExtremeDelaware; Dubuque; Linn; Jones; Iowa; Johnson; Cedar; Mus…
Blizzard WarningExtremeBuchanan; Benton

View all Iowa alerts →

Plumbing Regulations

Iowa follows the International Plumbing Code (2018 edition).

  • Plumbing code: IPC (2018)
  • Homeowner DIY: Licensed plumber required
  • Water heater permit: Required
  • Annual backflow test: Required

Full Iowa regulations →

Areas with Most Violations

ZIP CodeCitySafety ScoreViolationsHealth-BasedSystem
50002Adair—400NEOLA LIGHT & WATER
52001Dubuque—220DUBUQUE WATER WORKS
50003Adel—150ADEL MUNICIPAL WATER WORKS
50028Baxter—130BAXTER WATER SUPPLY
52240Iowa City—130IOWA CITY WATER DEPARTMENT
50322Urbandale—110URBANDALE WATER UTILITY
50009Altoona—93ALTOONA WATER SUPPLY
50613Cedar Falls—90CEDAR FALLS MUNICIPAL WATER UTILITIES
50039Bouton—83XENIA RWD (DES MOINES)
51101Sioux City—80SIOUX CITY WATER SUPPLY

Areas with No Violations

ZIP CodeCitySafety ScoreSystemPopulation
50006Alden—ALDEN WATER SUPPLY763
50022Atlantic—ATLANTIC MUNICIPAL UTILITIES7,252
50025Audubon—AUDUBON WATER SUPPLY2,053
50032Berwick—SUNNYBROOK MOBILE HOME PARK360
50034Blairsburg—BLAIRSBURG WATER SUPPLY177
50035Bondurant—BONDURANT MUNI WATER SUPPLY9,393
50062Melcher-dallas—MELCHER-DALLAS WATER SUPPLY1,213
50265West Des Moines—WEST DES MOINES WATER WORKS68,723
50301Des Moines—DES MOINES WATER WORKS246,055
50525Clarion—CLARION WATER SUPPLY2,810

Lead & Copper

  • 0 ZIP codes exceed the EPA lead action level

Radon Risk

  • High risk (Zone 1): 0 ZIP codes (0%)
  • Moderate risk (Zone 2): 0 ZIP codes
  • Low risk (Zone 3): 0 ZIP codes

All 41 ZIP Codes in Iowa

Data Sources

Updated daily.

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