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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
76–100 of 501Tontitown Waterworks
AR0000566 · 7,355 served
Nashville Rural Water Authority
AR0000805 · 7,291 served
Ne Yell County Water Assoc
AR0000697 · 7,198 served
Hwy 63 Water Association
AR0000107 · 7,187 served
Western Greene County R W D
AR0000704 · 7,095 served
Berryville Waterworks
AR0000074 · 6,813 served
Benton County Water District #1
AR0000037 · 6,730 served
Lincoln Waterworks
AR0000572 · 6,690 served
Clinton Waterworks
AR0000564 · 6,680 served
Tumbling Shoals Water Assoc
AR0000579 · 6,608 served
Mountain View Waterworks
AR0000542 · 6,349 served
Dumas Waterworks
AR0000171 · 6,338 served
Mount Olive Water Association
AR0000668 · 6,308 served
Green Forest Waterworks
AR0000077 · 6,265 served
Hwy 71 Water District #1 Pwa
AR0000145 · 6,250 served
Newport Waterworks
AR0000264 · 6,204 served
Alma Waterworks
AR0000144 · 6,123 served
Dequeen Water Work
AR0000520 · 6,105 served
Osceola Waterworks
AR0000375 · 6,053 served
Warren Waterworks
AR0000066 · 6,001 served
East End Water
AR0000646 · 5,954 served
Walnut Ridge Waterworks
AR0000309 · 5,823 served
Barling Waterworks
AR0000512 · 5,822 served
Horsehead Water Association
AR0000617 · 5,792 served
West Helena Water Works
AR0000416 · 5,693 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