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
76–100 of 537Anadarko Public Works Authority
OK1010806 · 6,804 served
Purcell
OK2004701 · 6,693 served
Osage Co Rwd #15
OK3005736 · 6,647 served
Vinita Utilities Authority
OK1021611 · 6,472 served
Stephens Co Rwd #5
OK2006969 · 6,426 served
Mayes Co Rwd # 2
OK3004608 · 6,280 served
Bryan Co. Rws & Swmd #2
OK1010604 · 6,270 served
Pauls Valley
OK1010808 · 6,256 served
Tecumseh Utility Authority
OK1020506 · 6,098 served
Henryetta Municipal Authority
OK1020709 · 6,096 served
Sapulpa Rural Water Company
OK3001904 · 5,810 served
Noble Utilities Authority
OK2001411 · 5,750 served
Mccurtain Co. Rwd #8 (mt. Fork Water)
OK1010207 · 5,685 served
Creek Co Rwd # 1
OK1020419 · 5,675 served
Hugo Municipal Authority
OK1010314 · 5,536 served
Deer Creek Rural Water Corp
OK2005504 · 5,500 served
Longtown Rw&sd #1 (pittsburg Co.)
OK1020623 · 5,444 served
Collinsville
OK1021505 · 5,400 served
Perry Water & Light Dept
OK1021206 · 5,230 served
Alva
OK2007603 · 5,208 served
Tri-county Rwd #2
OK2006362 · 5,172 served
Kingfisher
OK2003702 · 5,073 served
Porum Pwa
OK1020302 · 5,000 served
Sulphur
OK2005001 · 4,929 served
Lone Grove
OK2001007 · 4,863 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