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
101–125 of 498Xenia Rwd (boone)
IA0844006 · 4,975 served
Vinton Municipal Water Dept
IA0688053 · 4,938 served
Shenandoah Water Dept
IA7383045 · 4,925 served
Humboldt Municipal Water Dept
IA4641064 · 4,792 served
Camanche Water Supply
IA2322066 · 4,570 served
Evansdale Water Works
IA0723027 · 4,561 served
Mount Vernon Water Supply
IA5758021 · 4,527 served
Tiffin Water Supply
IA5288021 · 4,512 served
Dyersville Municipal Water Co
IA3130091 · 4,477 served
Anamosa Municipal Water Supply
IA5307048 · 4,457 served
Chariton Municipal Water Works
IA5903011 · 4,381 served
Clarinda Water Plant
IA7329029 · 4,372 served
Hampton Muni Water Works
IA3544024 · 4,337 served
Forest City Water Supply
IA9525047 · 4,285 served
Huxley Waterworks Dept
IA8538066 · 4,244 served
Jefferson Water Department
IA3742004 · 4,182 served
Carlisle Water Supply
IA9113071 · 4,170 served
Regional Water
IA8300184 · 4,132 served
Sirwa #3 (osceola)
IA2038701 · 4,080 served
Rock Valley Water Supply
IA8482096 · 4,059 served
Monticello Water Supply
IA5343098 · 4,040 served
Cresco Waterworks
IA4515087 · 3,913 served
West Liberty Water Utility
IA7073010 · 3,858 served
Waukon Water Department
IA0398082 · 3,827 served
Carter Lake Water District
IA7812079 · 3,791 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