Florida’s Fluoride Ban: What It Means for Your Water

On July 1, 2025, Florida became the second state in the U.S. to ban the addition of fluoride and certain other additives from public drinking water. Whether you think that’s good news or bad news depends on where you stand in the long-running fluoride debate — but either way, it’s a big change for Florida households.

Let's dive in and find out what this means for your water, your health, and your options moving forward.

Why Was Fluoride Added to the Water in the First Place

Confirmed fact: public fluoridation began after dentists and chemists noticed that certain U.S. towns with naturally fluoridated water had two things at once — mottled brown enamel on the teeth (now called dental fluorosis) and far fewer cavities than the average American at that time. (You can look up the pictures of this, but I don't recommend it.)

In Colorado Springs in 1901, dentist Frederick McKay documented what he called the “Colorado brown stain.” Although natural fluoride discolored teeth, those same teeth were unusually resistant to decay. In 1931, chemist H. V. Churchill used new methods to confirm there was fluoride in the local water supply. This led to large-scale studies by U.S. Public Health Service dentist H. Trendley Dean, who found that around 1 part per million (ppm) of fluoride in drinking water reduced cavities without causing significant visible fluorosis (brown stain).

Armed with this data, public health officials launched the first “adjusted fluoridation” trial in Grand Rapids, Michigan, in 1945 (paired with another city, Muskegon, as a control). Over the next decade, studies showed significant reductions in cavities among children in fluoridated communities — sometimes over 50% compared to non-fluoridated areas. Similar results came from trials in Newburgh, NY vs. Kingston, NY, and Brantford, Ontario vs. Sarnia.

So, it seemed that adding fluoride to the water reduced the occurrence of cavities. Just as a cook can use food coloring to enhance a dish's visual appeal, the addition of chemicals to our environment can both help and harm. Food coloring can make food more enticing and fun but may also create allergic reactions or hyperactivity.

Similarly, while fluoride in water seemed to help reduce cavities, it could pose other health risks. And what happens if the dosing gets out of control? What if adding other chemicals to the water such as chlorine has some other unintended consequence? Just like food coloring, fluoride might improve one thing but come with trade-offs.

Natural Fluoride Versus Added Fluoride

When we talk about "fluoride" in water, we're actually referring to fluoride with an extra electron (a fluoride ion), which is written as F⁻. (Later in this article there is more about ions, if you are interested.) This fluoride ion can come from natural sources, like certain types of rocks such with that element in them (fluorite is one), or it can be added to the public water by treatment plants. Of course that is all regulated under American Water Works Association (AWWA) and NSF/ANSI Standard 60.

Fluoride Additives in U.S. Water

In the United States, public water utilities often add fluoride to drinking water to help prevent tooth decay. They usually use one of three different additives, and all of these are carefully regulated. None of these additives are just pure fluoride, they are attached to other things like salt and silicon. These dissolve in the water, so you get more than just fluoride, and remember there are other chemicals being added as well.

Fluoride in Toothpaste

While public water fluoridation delivers about 1 ppm of fluoride, toothpaste is much more concentrated — usually 1,000–1,500 ppm. The idea is that this provides a strong topical benefit. But here again, it's not just fluoride. Usually sodium is used, but some other chemicals can be used as well. These chemicals are regulated by the FDA and must meet specific safety and labeling standards. Interestingly, the FDA just started removing fluoride from prescription drugs for the health and safety of children. Ingesting fluoride and the quantity of fluoride and the other chemicals we pair it with requires a much deeper dive than we can do here right now. (We will get some bigger oxygen tanks before we do that one.)

Why Florida Banned It

Supporters of the ban argue that additives like fluoride should be a personal choice, not a public mandate, and that potential health risks — though debated — justify removal. Opponents warn of increased dental decay, especially among children without regular access to dental care. One thing you can count on is that no amount of chemicals will replace the benefits of good hygiene practices.

What Changes for You

If you were on a municipal supply that used to add fluoride, it likely no longer does.

• Water safety for contaminants stays the same — the ban doesn’t affect chlorine disinfection or bacteria control.

• Choice is back in your hands — you can add fluoride through toothpaste, rinses, or dental treatments, or remove it completely with certified filtration.
  

If you want to avoid fluoride entirely, use a home water filter certified to remove fluoride (look for NSF/ANSI Standard 53 or 58). Contact us, we can help you get all kinds of chemicals out of your water.

What Are Ions?

To understand what ions are, think of them as tiny bits of electricity charging up tiny particles. Atoms are the building blocks of everything around us. Atoms can gain or lose electrons (the tiny bits of electricity). When an atom loses an electron, it becomes positively charged and is called a "cation". When it gains an electron, it becomes negatively charged and is called an "anion". The fluoride ion (F⁻) is an anion because it has gained an extra electron, giving it a negative charge.

Myth Versus Fact

Myth: “Fluoride in water is a synthetic chemical completely different from natural fluoride.” Fact: The fluoride ion is chemically identical regardless of source. The difference is in the compound added and how it dissolves to release fluoride, that's "synthetic" part and knowing the difference is important.

Myth: “Fluoride was added without any research.” Fact: Decades of epidemiological studies, starting in the early 20th century, documented both the benefits and risks, leading to controlled dosing.

Myth: “The synthetic chemicals stay in your tap water.”

Fact: The synthetic chemicals used will fully dissociate (different than dissolve) in water, leaving the fluoride ion and the other chemicals it was paired with. These other chemicals are typically going to result in something harmless like sodium or silica, but all possible combinations with other chemicals in the water are not fully explored and known and tested for their effects.

Myth: “If my city stops adding fluoride, my water is unsafe.”

Fact: Fluoride is added for a specific purpose which appears to be solely related to preventing tooth decay, not for water safety. Chlorination, filtration, and other safety treatments continue regardless of this change.

Myth: “All toothpastes have the same fluoride.”

Fact: Different compounds are used, but all claim to deliver the fluoride ion to help prevent tooth decay. Again, a full understanding of each compound and what it breaks down into and the effects on the whole body (not just teeth) has not be reached.