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
426–450 of 498Yes Regency Manor Llc
IA7727602 · 710 served
Stratford Muni Water Dept
IA4051002 · 707 served
The Meadows
IA7727609 · 702 served
Coggon Water Department
IA5722053 · 701 served
Boyden Municipal Water Supply
IA8409037 · 701 served
Woodward Resource Center
IA0800923 · 700 served
Battle Creek Water Supply
IA4709090 · 700 served
Lakeside Water Supply
IA1145047 · 700 served
Dexter Water Supply
IA2533038 · 693 served
Walker Water Works
IA5792059 · 688 served
Elgin Municipal Water Supply
IA3338010 · 685 served
Murray Water Works
IA2032023 · 684 served
Albert City Muni Water Supply
IA1103009 · 677 served
Alburnett Water Supply
IA5704012 · 675 served
Pomeroy Water Supply
IA1363051 · 671 served
Fontanelle Water Works
IA0135046 · 670 served
Yes Western Village Llc
IA7785601 · 670 served
Kanawha Water Supply
IA4150014 · 658 served
Olin Water Supply
IA5355094 · 651 served
Southridge Estate
IA7727603 · 648 served
What Cheer Water Supply
IA5493016 · 646 served
Seymour Municipal Utility Water Dept
IA9368035 · 637 served
Stanwood Water Supply
IA1681092 · 637 served
Moravia Public Water Supply
IA0467008 · 637 served
Fonda Water Supply
IA7603045 · 636 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