8 States with the Most Fluoridated Water in the US

3. Illinois

Population served by CWS that have fluoridated water (%): 98.40%

Home to the Great Lakes, Illinois is a state in the mid-western regions of the US. The population of the state is around 12,549,689, as reported by the US Census. It is one of the top 3 states with the most fluoridated water in the US. The community water systems supply water to 11,640,823 individuals in the state, and 11,457,094 of these people receive fluoridated water.