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Arkansas Water Quality
501
Utilities in database
3.0M
Residents served
32%
On private wells
2
Key contaminants tracked
Drinking Water in Arkansas
Arkansas has 501 community water systems serving approximately 3.0 million residents. Primary water sources include surface water. The most commonly reported contaminants include disinfection byproducts, nitrates. 32% of Arkansas residents rely on private wells. ADH holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in Arkansas
426–450 of 501Perry Water System
AR0000412 · 736 served
Huttig Waterworks
AR0000553 · 733 served
Leslie Water System
AR0000500 · 730 served
East Monroe County Water Users
AR0000715 · 730 served
Quinn Water Association
AR0000561 · 729 served
Junction City Waterworks
AR0000552 · 726 served
Hartford Waterworks
AR0000506 · 725 served
Northern Ohio Water Assoc
AR0000175 · 720 served
Salesville Community Water Association
AR0000036 · 715 served
Denning Waterworks
AR0000199 · 712 served
North Howard Rural Water Association
AR0001075 · 710 served
Sunset Water Association
AR0000472 · 710 served
Bauxite Water
AR0000497 · 705 served
Arkansas Health Center
AR0000485 · 700 served
Greasy Valley Wpfb Logan Co.
AR0000696 · 700 served
Cherry Valley Waterworks
AR0000158 · 690 served
West Ashley County Water Assn
AR0000878 · 683 served
Summit Waterworks
AR0000355 · 675 served
Indian Switch Rural Water Assn
AR0000781 · 670 served
Wilburn Water Association
AR0000686 · 668 served
Lake View Municipal Water
AR0000420 · 665 served
Wesson-newell Water Assoc
AR0000103 · 658 served
Gillett Water Dept
AR0000009 · 655 served
Cove Waterworks
AR0000439 · 651 served
Houston Waterworks
AR0000414 · 650 served
Key Contaminant Concerns in Arkansas
Nitrates
Nitrate (NO₃⁻) is a nitrogen-containing compound that forms naturally through the decomposition of organic matter. At elevated concentrations — almost always from human activity — nitrate interferes with the blood's ability to carry oxygen. The United States produces over 23 million tons of nitrogen fertilizer annually, making agricultural runoff the dominant source of nitrate contamination.
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.
Arkansas Water FAQs
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Data source: Utility data from EPA SDWIS. 501 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22