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
276–300 of 501Pleasant View Water Fac Board
AR0000202 · 1,708 served
Richwoods Water Association
AR0000835 · 1,663 served
Earle Waterworks
AR0000150 · 1,659 served
Adc East Arkansas Regional
AR0000796 · 1,650 served
Palestine Water Association
AR0000536 · 1,649 served
Mulberry Waterworks
AR0000136 · 1,648 served
Murfreesboro Waterworks
AR0000425 · 1,645 served
Salem Waterworks
AR0000204 · 1,639 served
Stamps Waterworks
AR0000296 · 1,633 served
Waldo Waterworks
AR0000112 · 1,630 served
Kensett Waterworks
AR0000588 · 1,624 served
Ludwig Water Association
AR0000292 · 1,610 served
Selma Water Association
AR0000182 · 1,600 served
Calhoun County Water Assn
AR0000919 · 1,591 served
Caldwell Water
AR0000532 · 1,585 served
Delight Waterworks
AR0000423 · 1,577 served
Holly Grove Waterworks
AR0000388 · 1,557 served
Morning Star Public Water Authority
AR0000681 · 1,543 served
Scranton Waterworks
AR0000330 · 1,542 served
Camp Robinson
AR0000877 · 1,500 served
Casa Water Dept
AR0000660 · 1,500 served
Plumerville Waterworks
AR0000121 · 1,440 served
Lacey-ladelle Water Associatio
AR0000684 · 1,438 served
Winslow Waterworks
AR0000332 · 1,433 served
Caraway Waterworks
AR0000127 · 1,432 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