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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
251–275 of 501Lewisville Waterworks
AR0000297 · 1,951 served
Bay Waterworks
AR0000129 · 1,938 served
Freedom Public Water Authority
AR0000812 · 1,935 served
North Pike Co Rural Water Assn
AR0000826 · 1,932 served
East Newton County Water Assn
AR0000768 · 1,920 served
Lake Chicot Water Supply Association
AR0000080 · 1,909 served
Hampton Waterworks
AR0000070 · 1,906 served
Midway Water Association
AR0000153 · 1,899 served
Lamar Waterworks
AR0000288 · 1,885 served
Lakeside Water Association
AR0000822 · 1,876 served
Dorcheat Water Association
AR0000714 · 1,860 served
Magnet-butterfield Water Authority
AR0000241 · 1,838 served
West Saline Water Users Assn
AR0000682 · 1,825 served
Altus Waterworks
AR0000197 · 1,820 served
Tuckerman Waterworks
AR0000266 · 1,817 served
Kibler Water System
AR0000140 · 1,815 served
Benton County Water Authority5
AR0000913 · 1,813 served
Riviera Utilities
AR0000239 · 1,800 served
Dover Waterworks
AR0000444 · 1,797 served
Frenchport Water Association
AR0000636 · 1,793 served
Mammoth Spring Waterworks
AR0000206 · 1,777 served
Ladd Water Association
AR0000277 · 1,773 served
Mc Crory Waterworks
AR0000599 · 1,736 served
S P G Water Association
AR0000678 · 1,730 served
Calico Rock Waterworks
AR0000003 · 1,726 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
Quick Links
Data source: Utility data from EPA SDWIS. 501 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22