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
451–475 of 501Jasper Waterworks
AR0000397 · 648 served
Hatfield Waterworks
AR0000436 · 641 served
Benton County Water Authority4
AR0000899 · 635 served
Portland Waterworks
AR0000018 · 625 served
Ravenden Waterworks
AR0000306 · 621 served
Chicot Junction Water Assoc
AR0000661 · 616 served
Northeast Dewitt Water Assoc
AR0000007 · 610 served
Bigelow Waterworks
AR0000411 · 605 served
Horseshoe Lake Utilities
AR0000151 · 603 served
Humphrey Waterworks
AR0000010 · 602 served
Devalls Bluff Waterworks
AR0000450 · 600 served
Arsenal Water System
AR0000667 · 600 served
Johnson Township Water Assoc
AR0000640 · 600 served
Green Hill-brooks Chapel Water
AR0000701 · 597 served
Fifty Six Waterworks
AR0000046 · 593 served
Portia Waterworks
AR0000305 · 586 served
Batts-lapile Water Association
AR0000622 · 583 served
Sulphur Springs Waterworks
AR0000057 · 580 served
Wheatley Waterworks
AR0000535 · 573 served
Lakeshore Estates Water Assn
AR0000726 · 568 served
Alpena Waterworks
AR0000058 · 568 served
Bradley Waterworks
AR0000294 · 567 served
Taylor Waterworks
AR0000114 · 566 served
Bowser Water Assn
AR0000179 · 564 served
Leola Waterworks
AR0000218 · 564 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