Frequent Questions

Why is EPA's drinking water standard different than Department of Health and Human Service's recommended optimal fluoridation level for community drinking water systems?

EPA's drinking water standard differs from the Department of Health and Human Service's recommended optimal fluoridation level because the two benchmarks have different purposes and are set under different authorities. The EPA's enforceable standard for the highest level of fluoride that is allowed in public water supplies is 4.0 milligrams per liter, is set to protect against risks from exposure to too much fluoride. The HHS recommended optimal level of 0.7 milligrams per liter is set to promote public health benefits of fluoride for preventing tooth decay while minimizing the chance for dental fluorosis.

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