Fluoride in California Well Water

In California, fluoride levels average 1.375 mg/L, with a maximum recorded level of 4.775 mg/L. The EPA limit is 4 mg/L. Currently 4.2% of tested wells exceed this limit, affecting approximately 50,400 wells.

Testing for fluoride in California typically costs around $141. If treatment is needed, water treatment systems for fluoride cost approximately $757.

The risk level for fluoride in California is rated as low. The state average of 1.375 mg/L is 22.4% below the national average of 1.771 mg/L.