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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
376–400 of 501Hughes Waterworks
AR0000531 · 987 served
Bradford Waterworks
AR0000587 · 986 served
Weiner Waterworks
AR0000428 · 973 served
Nail-swain Water Association
AR0000856 · 970 served
Tyronza Waterworks
AR0000426 · 958 served
Fouke Waterworks
AR0000358 · 955 served
South Mountain Water Assn
AR0000815 · 948 served
Hartman Waterworks
AR0000286 · 947 served
Deer Water Association
AR0000670 · 938 served
Western Grove Municipal Water
AR0000400 · 930 served
Clarkedale-jericho Water Assoc
AR0000148 · 925 served
Norfork Waterworks
AR0000035 · 918 served
Dennard Water Association
AR0000461 · 908 served
Ar Dept of Correction Izard Co
AR0000790 · 907 served
Mt Sherman Water Association
AR0000680 · 903 served
Thornton Waterworks
AR0000072 · 900 served
Mc Neil Rural Water Assoc
AR0000705 · 900 served
Poyen Waterworks
AR0000217 · 875 served
Mockingbird Hill Water Assoc
AR0000042 · 875 served
Mc Rae Waterworks
AR0000589 · 870 served
Luxora Waterworks
AR0000361 · 868 served
Marysville Water Association
AR0000001 · 867 served
New London Water Association
AR0000557 · 850 served
Pendleton-pea Ridge Water Assn
AR0000649 · 845 served
Gould Municipal Water-sewer
AR0000316 · 837 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