During the 2025 Legislative Session, Utah lawmakers passed HB81 – Fluoride Amendments, which prohibits the addition of fluoride to public drinking water in Utah starting May 7, 2025.
Continued oversight of fluoride in drinking water
Although public water systems in Utah must stop adding fluoride treatment by May 7, 2025, we will continue to require systems to monitor and report naturally occurring fluoride levels in accordance with the Safe Drinking Water Act requirements.
Fluoride is a mineral commonly found in groundwater, especially in areas with certain types of rock and soil. Even without added treatment, some drinking water may still contain natural levels of fluoride.
We continue monitoring to ensure levels remain safe and to notify the public if fluoride ever exceeds health standards. There are two key limits:
- Primary Maximum Contaminant Level (MCL): 4.0 mg/L
Levels above this may pose long-term health risks, such as bone pain or disease. - Secondary MCL: 2.0 mg/L
Levels above this may cause cosmetic effects like staining or pitting of teeth in children under nine.
How to find naturally occurring fluoride levels in your drinking water
Naturally occurring fluoride levels in your drinking water
Fluoride may naturally be present in Utah’s groundwater and surface water sources. Division data displayed on our map of natural fluoride levels displays the measured naturally occurring fluoride levels (mg/L) for each active point of entry in Utah’s regulated public water systems. Point of entries are defined as the sampling location in which a single or multiple sources of drinking water supply water to a distribution system. Not all entry points supply water year round, nor do they supply the same quantity of water. The Utah Division of Drinking Water strongly recommends that users contact the water systems directly to obtain a more detailed understanding of their background fluoride levels and the system’s unique operations.
Fluoride Supplementation Questions
The Division of Drinking Water does not have the expertise to recommend fluoride supplementation nor do we set guidelines for determining fluoride dosage supplementation.
If you have questions about fluoride for you or your family, your dentist, doctor, or another healthcare provider is the best place to start. They can provide guidance from recognized public health experts like the American Dental Association (ADA), the Utah Department of Health and Human Services, your local health department, and the U.S. Centers for Disease Control and Prevention (CDC).