State Hub
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
101–125 of 501Clay Co Reg Water District
AR0000722 · 5,633 served
Mena Water Department
AR0000438 · 5,604 served
Hamburg Waterworks
AR0000015 · 5,600 served
Watson Chapel Water Assoc
AR0000284 · 5,590 served
Perryville Waterworks
AR0000413 · 5,538 served
Sevier Co Water Association
AR0000868 · 5,365 served
Cave Springs Waterworks
AR0000043 · 5,365 served
North White Co Rural Water Pfb
AR0000583 · 5,215 served
East Johnson Co Water Assn
AR0000772 · 5,200 served
West Stone County Water Assn
AR0000735 · 5,188 served
Se White County Water Assoc
AR0000594 · 5,018 served
Wooster Waterworks
AR0000196 · 5,000 served
Paris Waterworks
AR0000328 · 4,935 served
Gravette Waterworks
AR0000051 · 4,900 served
Four Mile Hill Public Facilities Board
AR0000586 · 4,877 served
Cherokee Village Water Assoc
AR0000521 · 4,780 served
North East Public Water Auth
AR0000033 · 4,690 served
Piggott Waterworks
AR0000090 · 4,620 served
Sheridan Waterworks
AR0000215 · 4,605 served
Hardin Water Association
AR0000273 · 4,600 served
Sw Boone County Water Assoc
AR0000628 · 4,558 served
Holiday Island Waterworks
AR0000078 · 4,540 served
Dardanelle Waterworks
AR0000601 · 4,517 served
Prescott Waterworks
AR0000394 · 4,500 served
Atkins Water System
AR0000441 · 4,439 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