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
51–75 of 537Rogers Co Rwd # 3 Cot Sta
OK3006650 · 10,750 served
Elk City
OK2000501 · 10,510 served
Rogers Co Rwd # 3 Lake Plant
OK1021513 · 10,470 served
Guthrie
OK1020903 · 9,925 served
Coweta Pwa
OK1021509 · 9,450 served
Leflore Co. Rwd #14
OK3004001 · 9,077 served
Logan Co Rwd #1
OK2004207 · 8,907 served
Clinton
OK1010828 · 8,883 served
Pryor
OK3004611 · 8,784 served
Sallisaw
OK1020206 · 8,510 served
Jefferson Co Cons Rwd #1
OK3003401 · 8,398 served
Cushing
OK2006061 · 8,371 served
Okmulgee Co. Rwd #6 (hectorville)
OK3005611 · 8,370 served
Bryan County Rural Water District #5
OK3000704 · 8,325 served
Skiatook Pwa
OK1021313 · 8,110 served
Wagoner
OK1021649 · 7,982 served
Poteau Pwa
OK3004015 · 7,939 served
Newcastle
OK2004704 · 7,900 served
Rogers Co Rwd # 4
OK1021506 · 7,725 served
Blackwell Municipal Authority
OK1021101 · 7,668 served
Piedmont Municipal Authority
OK2000909 · 7,542 served
Grove Municipal Services Auth.
OK1021614 · 7,311 served
Falls Creek Baptist Conference Center
OK1010840 · 7,000 served
Idabel Pwa
OK1010203 · 6,952 served
Seminole
OK2006720 · 6,899 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
Quick Links
Data source: Utility data from EPA SDWIS. 537 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22