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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
351–375 of 501St Francis Rural Water Assoc
AR0000537 · 1,103 served
Belleville Water
AR0000600 · 1,103 served
Hardy Waterworks
AR0000524 · 1,101 served
Stephens Waterworks
AR0000405 · 1,100 served
Strawberry Waterworks
AR0000307 · 1,093 served
Newark Waterworks
AR0000248 · 1,091 served
Hackett Waterworks
AR0000505 · 1,090 served
Tulip-princeton Water Assn
AR0000825 · 1,083 served
Dell Waterworks
AR0000367 · 1,077 served
Diaz Waterworks
AR0000269 · 1,071 served
Mountainburg Water and Sewer
AR0000141 · 1,052 served
Parkin Waterworks
AR0000160 · 1,045 served
Ne Mississippi Co Water Assoc
AR0000673 · 1,040 served
Marvell Waterworks
AR0000421 · 1,035 served
Black Rock Waterworks
AR0000302 · 1,034 served
Dyer Waterworks
AR0000143 · 1,028 served
Fountain Hill Waterworks
AR0000016 · 1,028 served
Ratcliff Waterworks
AR0000329 · 1,019 served
Swifton Waterworks
AR0000265 · 1,013 served
Foreman Waterworks
AR0000323 · 1,011 served
Lost Bridge Vill Wat-sew Dists
AR0000049 · 1,010 served
Liberty - Woodson / Hensley Wat
AR0000471 · 1,000 served
Magazine Waterworks
AR0000327 · 1,000 served
Colt Water Association
AR0000533 · 997 served
Compton Waterworks
AR0000669 · 990 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