Fight against fluoride is expanding on the local and national stage

In 2022, the percent of Wisconsin residents who had fluoridated water dropped sharply. According to data from the state’s Department of Health Services, 86.9% of residents had fluoridated water in 2021. A year later, that had dropped to 84.9%. Combining data from the national Centers for Disease Control and Prevention and the Environmental Protection Agency shows that, in 2024, about 83.6% of the state’s residents have fluoridated water.

The Wisconsin State Journal reported that multiple communities are removing fluoride from their water systems. Opponents of fluoridated water cited a report on fluoride being harmful to children. However, the CDC named fluoridated water systems as one of the greatest health achievements of the 1900s. The CDC recommends 0.7 milligrams of water per liter, or about three drops of fluoride per 55 gallons of water.

This isn’t just a Wisconsin problem. Across the country, fluoride in water is becoming a controversial topic. Coverage from the Associated Press indicated that Robert F. Kennedy Jr.’s push for removing fluoride from water systems is one of the inciting factors to the controversy. Kennedy is now President-elect Donald Trump’s nominee to lead the federal Department of Health and Human Services. 

According to a 2018 publication by the American Dental Association, having fluoride in water systems prevents 25% of tooth decay in children and adults. It can also help reverse tooth decay and lower dental costs for the average consumer. Annually, fluoridated water can lower the cost of dental care by over $32 per person. 

The Fluoride Action Network, an organization dedicated to ending water fluoridation, argues that fluoride is an unnecessary, toxic and dangerous chemical that should not be added to water systems. It cites a 2024 report by the HHS’s National Toxicology Program that says having twice the CDC-recommended amount of fluoride in water systems correlates with lower IQs in children. The study was not conducted with any data from the United States and does not specify that fluoride causes a lower IQ.

This article first appeared on Wisconsin Watch and is republished here under a Creative Commons license.