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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
26–50 of 501Washington Water Authority Wwa
AR0000574 · 20,140 served
Mountain Home Waterworks
AR0000025 · 19,618 served
Bryant Waterworks
AR0000486 · 19,607 served
Community Water System
AR0000101 · 18,628 served
El Dorado Waterworks
AR0000550 · 17,932 served
Conway Co Regional Water Dist
AR0000119 · 17,858 served
Harrison Waterworks
AR0000062 · 17,455 served
Hot Springs Village Waterworks
AR0000208 · 15,985 served
Sardis Water Association
AR0000493 · 15,660 served
Grand Prairie Regional Water
AR0000738 · 15,204 served
Heber Springs Water System
AR0000104 · 14,015 served
Grand Prairie Bayou 2 Pwa
AR0000734 · 13,519 served
Camden Waterworks
AR0000404 · 13,275 served
Marion Waterworks
AR0000152 · 13,032 served
Blytheville Waterworks
AR0000365 · 12,981 served
Greenbrier Waterworks
AR0000191 · 12,938 served
Kimzey Regional Water District
AR0000821 · 12,718 served
Ward Waterworks
AR0000345 · 12,579 served
Sw White County Water Assn
AR0000185 · 12,173 served
Arkadelphia Waterworks
AR0000085 · 11,855 served
Magnolia Waterworks
AR0000109 · 11,657 served
James Fork Regional Water District
AR0000513 · 11,538 served
Hope Water Light Comm
AR0000230 · 11,500 served
Madison Co Water Facilities Bd
AR0000349 · 11,435 served
Mid-arkansas Utilities P.w.a
AR0000725 · 11,148 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