State Hub
Iowa Water Quality
498
Utilities in database
2.9M
Residents served
35%
On private wells
2
Key contaminants tracked
Drinking Water in Iowa
Iowa has 498 community water systems serving approximately 2.9 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, arsenic. 35% of Iowa residents rely on private wells. DNR holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in Iowa
326–350 of 498Yes Five Seasons Cedar Llc
IA5715602 · 994 served
Greene Muni Water Supply
IA1253006 · 994 served
Odebolt Water Supply
IA8144087 · 994 served
Lawton Water Supply
IA9743065 · 988 served
Fredericksburg Water Supply
IA1940068 · 987 served
Lansing Water Supply
IA0345054 · 983 served
Anita Municipal Utilities
IA1503053 · 972 served
Aurelia Water Supply
IA1803079 · 968 served
Allison Water Supply
IA1203026 · 966 served
Wayland Water Supply
IA4490091 · 966 served
Shellsburg Water Supply
IA0670043 · 961 served
Keosauqua Water Works
IA8938026 · 961 served
De Soto Water Supply
IA2529035 · 960 served
Gowrie Muni Utilities Water Dept
IA9436095 · 954 served
Preston Muni Water Supply
IA4965057 · 949 served
Edgewood Water Supply
IA2220002 · 939 served
Hinton Water Supply
IA7528051 · 935 served
Alpine Park
IA3126605 · 932 served
Sioux Rapids Water Department
IA1175056 · 932 served
Inwood Water Supply
IA6040076 · 928 served
Eldon Water Supply
IA9053004 · 927 served
Larchwood Water Supply
IA6050059 · 926 served
Danville Water Supply
IA2915000 · 923 served
Princeton Water Supply
IA8273061 · 923 served
West Point Muni Water System
IA5691012 · 921 served
Key Contaminant Concerns in Iowa
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
Arsenic
Arsenic (As) occurs naturally in rock and soil, dissolving into groundwater through natural weathering processes. Inorganic arsenic — the form found in drinking water — is a known human carcinogen. The western United States has particularly arsenic-rich geological formations, but elevated levels have been found in 48 states. Arsenic is tasteless and odorless.
Iowa Water FAQs
Quick Links
Data source: Utility data from EPA SDWIS. 498 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22