According to the anti-fluoride group Fluoride Action Network, since 2010, over 240 communities around the world have removed fluoride from their drinking water or decided not to add it.

One needs only to look to Union County to see just how intense discussions can be. Usually when the commissioners meet on the first floor of the Government Center in downtown Monroe, there are more vacant seats than attendees. But sessions about the prohibition of fluoride in public water supplies were packed, and residents who signed up to speak were divided.

One person who came to the microphone on Feb. 5 compared water fluoridation to a seat belt. It does not “prevent the car crash, but it limits the harm done,” he said. Another argued that there is no proof fluoride is safe or effective. “It’s a significant potential milestone to reverse 60-plus years of poisoning the public,” he said, using an unproven claim often made by opponents of fluoridation.

Fluoride opponents claim the mineral is responsible for everything from acne to high blood pressure and thyroid dysfunction to bone cancer.

The National Institutes of Health acknowledges that, when ingested in extremely large amounts, fluoride from dental products or dietary supplements can cause nausea, vomiting, abdominal pain, diarrhea, bone pain, and even death in extremely rare cases.

Infants and children who receive too much fluoride can develop discoloration or small dents in their teeth. In adults, consumption of excessive fluoride for extended periods can lead to skeletal fluorosis, a very rare condition that causes joint pain and stiffness, weak bones, muscle loss, and nerve problems.

However, the recommended dosage in drinking water has always been small. In 2015, the Department of Health and Human Services lowered the optimal fluoride concentration from 1.2 milligrams per liter to 0.7 mg/L.

Juneau, Alaska, voted to remove fluoride from its drinking water in 2007. A study published in the journal BMC Oral Health in 2018 compared the dental records of children and adolescents who received dental care for decaying teeth four years before and five years after the city stopped adding fluoride to the water. Cavity-related procedures and treatment costs were significantly higher in the latter group, the study found.

Portland, Oregon, is the largest city in the nation that has consistently refused to fluoridate its drinking water. Voters have repeatedly rejected measures to add it, first in 1956 and the latest time in 2013.

Despite the strong recommendation of local doctors and dentists, voters in Wichita, Kansas, have rejected adding fluoride to the water several times, most recently in 2012.

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