Tapcensus

Cyanide violations in Oklahoma

10 active public water systems in Oklahoma had a Cyanide violation in the past three years. What Cyanide is and why it matters.

Health effects: Acute high-dose cyanide exposure interferes with cellular oxygen use and can cause rapid deterioration of the central nervous system, including headache, dizziness, and in severe cases, loss of consciousness. Chronic exposure at lower levels is associated with thyroid dysfunction and nerve damage. Most drinking water violations pose chronic rather than acute risk.

Systems with a Cyanide violation

Latest quarter first, then largest first
SystemServesStatusRules violated, 3 yrUnresolved
Tri-County Rwd #2
Pottawatomie County 		5,172 3 0
Seminole Co. Rwd #7
Seminole County 		450 3 1
Freedom Farms
Cleveland County 		85 7 3
Timber Creek MHP East & West
Pottawatomie County 		40 10 2
Canoe Mountain Water System
Cherokee County 		37 12 2
Rock Creek
Logan County 		33 12 5
Kidz Club Child Care Center
Grady County 		32 6 2
Country Haven MHP
Oklahoma County 		30 8 2
Oklahoma City North Canadian Stp
Oklahoma County 		30 7 1
Grandview Village
Delaware County 		24 5 0
About this data

A system is counted once if any of its violations in the past three years involved Cyanide, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Cyanide alone.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Oklahoma records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.