Does Cheyenne Add fluoride to Drinking Water?

The Centers for Disease Control and Prevention (CDC) recommends an optimal fluoride concentration of 0.7 mg/L in drinking water. At this concentration, the CDC has determined that the fluoride helps protect teeth. Fluoride levels higher than 2.0 mg/L can cause aesthetic issues such as tooth discoloration. Floride higher than 4.0 mg/L can cause health issues. For more information on fluoride, please visit the CDC's website or the Environmental Protection Agency’s website.

Cheyenne’s water sources naturally contain an average of around 0.5 milligrams per liter (mg/L) of fluoride. This fluoride is dissolved from rocks and soils in the mountains west of Cheyenne.

When the water from Cheyenne's water sources is below 0.5 mg/L of fluoride, the Board of Public Utilities adds a small amount of fluoride that was mined from high quality natural deposits to increase the fluoride concentration to the CDC’s recommended concentration of 0.7 mg/L.