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
201–225 of 501Marked Tree Waterworks
AR0000430 · 2,610 served
Dermott Waterworks
AR0000082 · 2,604 served
Eudora Waterworks
AR0000083 · 2,600 served
Lafe Regional Water Distribution Distric
AR0000483 · 2,583 served
Little Creek Water Association
AR0000214 · 2,561 served
Jefferson Public Water Authority
AR0000276 · 2,551 served
Bono Waterworks
AR0000126 · 2,550 served
Marshall Waterworks
AR0000501 · 2,550 served
Saline Co Ww Ss Pfb
AR0000491 · 2,538 served
Bearden Waterworks
AR0000401 · 2,511 served
England Waterworks
AR0000341 · 2,477 served
Decatur Waterworks
AR0000052 · 2,468 served
St Francis River Reg Water Dd
AR0000836 · 2,465 served
Guy Waterworks
AR0000192 · 2,438 served
Fulton County Water Authori
AR0000814 · 2,411 served
Clark County Country Water Facilities
AR0000741 · 2,403 served
Parkers Chapel Public Water
AR0000560 · 2,391 served
Highland Water Association
AR0000672 · 2,390 served
Mansfield Waterworks
AR0000509 · 2,367 served
Southwest Arkansas Water System
AR0000889 · 2,335 served
Gateway Public Water Authority
AR0000693 · 2,325 served
Carlisle Waterworks
AR0000339 · 2,300 served
Rector Waterworks
AR0000093 · 2,280 served
Watalula Water Ass0ciation
AR0000606 · 2,278 served
East Logan Co Rural Water
AR0000809 · 2,263 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