What is fluoride?
Fluoride is the 13th most abundant element in the earth’s crust and occurs naturally in almost all surface and ground waters. In Marin, the natural fluoride concentration is about 0.1 parts per million (ppm.) Seawater contains about 1.4 ppm fluoride. Fluoride also occurs naturally in many foods, including; tea, grape juice, seafood, and chicken.

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1. What is fluoride?
2. What is fluoridation?
3. Can I use optimally fluoridated tap water to mix infant formula?
4. Why is the Marin Municipal Water District fluoridating the water supply?
5. How much fluoride is added to the drinking water?
6. What chemical is being used?
7. How much does MMWD spend to fluoridate the water?
8. Can Marin Municipal Water District stop fluoridating the water supply?
9. What can I do to decrease the chances that my child’s teeth will develop fluorosis?