Florida is facing a critical moment in oral health. With the recent statewide ban on water fluoridation, dental experts are sounding the alarm about a likely surge in preventable dental diseases, especially cavities. What many Floridians-and Americans in general-don’t realize is that cavities are not just a personal health issue.
They are, in fact, contagious, and can spread from person to person, particularly among families and close contacts. This article explores the science behind cavity transmission, the impact of Florida’s new fluoride policy, and what you can do to protect your oral health.
Cavities: More Than Just a Personal Problem
Cavities, or dental caries, are caused by specific bacteria in the mouth that produce acid when they digest sugars. This acid erodes tooth enamel, leading to decay. While most people associate cavities with poor brushing or sugary diets, fewer realize that the bacteria responsible for cavities-primarily Streptococcus mutans-can be transferred between individuals.
How Cavities Spread
The transmission of cavity-causing bacteria typically occurs through the exchange of saliva. Common ways this happens include:
- Sharing eating utensils or drinking glasses
- Kissing
- Blowing on food to cool it for a child
- Cleaning a pacifier with your mouth
Young children are particularly vulnerable, as parents and caregivers are often the primary source of this bacterial transfer.
Florida’s Fluoride Ban: A Risk Multiplier
On May 15, 2025, Florida became the second state in the U.S. to ban the addition of fluoride to public water supplies, despite decades of evidence showing that fluoridation significantly reduces cavities across populations
According to the Centers for Disease Control and Prevention (CDC), as of 2022, about 63% of Americans lived in areas with fluoridated water. Dental professionals warn that ending this public health measure will likely result in a marked increase in cavities, especially among children.
“When communities stop fluoridating, cavities increase and school absences due to dental pain increase,” said State Sen. Barbara Sharief during the Senate debate.
Latest Statistics: The Scope of the Problem
In the U.S., cavities remain one of the most common chronic diseases of childhood, with about 52% of children aged 6 to 8 having had a cavity in their primary teeth, according to the CDC (2022 data).
Among adults, over 90% have had at least one cavity, and about 26% have untreated tooth decay at any given time.
With the removal of fluoride from public water, experts project a significant uptick in these numbers in Florida, as seen in previous communities that discontinued fluoridation.
Why Most People Don’t Know Cavities Are Contagious
Public awareness campaigns have long focused on brushing, flossing, and limiting sugar intake. However, the concept of cavities as an infectious disease is less widely known. Many parents are unaware that their own oral health directly impacts their children’s risk for cavities. This knowledge gap can lead to unintentional habits-like sharing utensils-that facilitate the spread of cavity-causing bacteria.
Protecting Your Family: Prevention Tips
Given the new risks posed by the fluoride ban and the contagious nature of cavities, experts recommend:
- Avoid sharing utensils, cups, or food with young children.
- Do not clean pacifiers with your mouth.
- Maintain excellent oral hygiene for all family members.
- Use fluoride toothpaste and ask your dentist about fluoride treatments.
- Schedule regular dental check-ups, especially for children.
- Limit sugary snacks and drinks.
Conclusion
The recent fluoride ban in Florida highlights the urgent need for public education about dental health. Cavities are not just a result of poor brushing-they are a contagious disease that can spread within families and communities.
With the loss of a key preventive measure, Floridians must be more vigilant than ever about oral hygiene and the ways cavities can be transmitted. Understanding the contagious nature of cavities is the first step in protecting yourself and your loved ones from a surge in dental disease.
Source:
[1] https://www.nytimes.com/2025/05/15/us/politics/florida-fluoride-water-ban.html
[2] https://www.wusf.org/health-news-florida/2025-05-06/as-florida-watches-utah-dentists-prepare-patients-for-the-first-statewide-fluoride-ban
[3] https://www.governing.com/policy/florida-becomes-second-state-to-ban-fluoride-in-tap-water
[4] https://www.suncoastdental.org/post/are-cavities-contagious
[5] https://www.mayoclinic.org/diseases-conditions/cavities/symptoms-causes/syc-20352892
[6] https://health.wusf.usf.edu/health-news-florida/2025-05-06/as-florida-watches-utah-dentists-prepare-patients-for-the-first-statewide-fluoride-ban
[7] https://edition.cnn.com/2025/03/29/health/fluoride-tooth-decay-partner-kff-health-news
[8] https://mynews13.com/fl/orlando/news/2025/02/19/florida-lawmakers-look-to-address-dentist-shortage