Frequent Questions

What is the current drinking water standard for fluoride?

The current enforceable drinking water standard for fluoride is 4.0 mg/L.  This is the maximum amount that is allowed in water from public water systems. It is set to meet the current public health goal for protection against increased risk of crippling skeletal fluorosis, a condition characterized by pain and tenderness of the major joints.  EPA also has a non-enforceable secondary standard for fluoride of 2.0 mg/L, which is recommended to protect children against the tooth discoloration and/or pitting that can be caused by excess fluoride exposures during the formative period prior to eruption of the teeth.  Although water systems are not required to comply with secondary standards, for fluoride, EPA does require that systems notify customers if the average water levels exceed the secondary standard.

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