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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
476–500 of 501Antoine Waterworks
AR0000424 · 563 served
Kelso-rohwer Water Association
AR0000168 · 563 served
Okolona Waterworks
AR0000089 · 562 served
Whelen Springs Water Dept
AR0000804 · 559 served
Bonanza Waterworks
AR0000979 · 555 served
Emmet Waterworks
AR0000393 · 550 served
Grannis Waterworks
AR0000437 · 548 served
Walkerville Water Association
AR0000639 · 547 served
Millwood Water Corporation
AR0000409 · 545 served
East Prairie County Pwa
AR0000458 · 545 served
Turrell Water Works
AR0000155 · 540 served
Caddo Valley Waterworks
AR0000515 · 535 served
Subiaco City Waterworks
AR0000135 · 533 served
Locust Bayou Water Association
AR0000102 · 531 served
Airport Road Water Association
AR0000663 · 525 served
Lead Hill Waterworks
AR0000063 · 525 served
Big Flat Waterworks
AR0000026 · 523 served
Sdm Water Association
AR0000758 · 520 served
Spadra-goose Camp Water Assoc
AR0000293 · 517 served
Mc Neil Waterworks
AR0000110 · 515 served
Basin Valley Water System
AR0000819 · 513 served
Widener Waterworks
AR0000538 · 507 served
Amity Waterworks
AR0000088 · 506 served
Bellefonte Water
AR0000059 · 503 served
Branch Water Works
AR0000653 · 500 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
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Data source: Utility data from EPA SDWIS. 501 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22