State Hub
Oklahoma Water Quality
537
Utilities in database
3.6M
Residents served
25%
On private wells
3
Key contaminants tracked
Drinking Water in Oklahoma
Oklahoma has 537 community water systems serving approximately 3.6 million residents. Primary water sources include surface water. The most commonly reported contaminants include disinfection byproducts, nitrates, arsenic. 25% of Oklahoma residents rely on private wells. DEQ holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in Oklahoma
301–325 of 537Rogers Co Rwd # 6
OK3006628 · 1,560 served
Fairfax
OK1021204 · 1,555 served
Apache
OK2000806 · 1,521 served
Snyder Public Works Authority
OK1011503 · 1,509 served
Atoka Co. Rwd #3 (caney)
OK2000302 · 1,500 served
Tillman Co Rwd #1
OK2007107 · 1,500 served
Wagoner Co. Rwd #6
OK3007330 · 1,500 served
Latimer Co. Rwd #2
OK3003903 · 1,500 served
Mcintosh Co. Rwd #6 (vivian)
OK2004913 · 1,500 served
South Delaware Co Regional Water Auth.
OK1221645 · 1,500 served
Osage Co Rwd #21
OK2003616 · 1,500 served
Cherokee Co. Rwd #2 (keys)
OK1021711 · 1,493 served
Boise City Pwa
OK2001303 · 1,483 served
Konawa Pwa
OK2006704 · 1,479 served
Mcintosh Co. Rwd #13 (wells)
OK2005603 · 1,465 served
Morris
OK3005610 · 1,460 served
Wetumka
OK1020508 · 1,451 served
Garvin Co Rwd #1
OK2002516 · 1,445 served
Vian
OK3006812 · 1,445 served
Oilton
OK2001901 · 1,435 served
Afton Pwa
OK1021696 · 1,428 served
Granite Pws
OK2002804 · 1,425 served
Salina Pwa
OK1021603 · 1,422 served
Crescent
OK2004204 · 1,411 served
Payne Co Rwd #3
OK2006011 · 1,400 served
Key Contaminant Concerns in Oklahoma
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.
Arsenic
Arsenic (As) occurs naturally in rock and soil, dissolving into groundwater through natural weathering processes. Inorganic arsenic — the form found in drinking water — is a known human carcinogen. The western United States has particularly arsenic-rich geological formations, but elevated levels have been found in 48 states. Arsenic is tasteless and odorless.
Oklahoma Water FAQs
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Data source: Utility data from EPA SDWIS. 537 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22