Jacksonville Water Fluoride and Fluoride Toothpaste: Common Questions

Yes, JEA's drinking water contains fluoride, but it isn't added. It occurs naturally in the Floridan aquifer, and JEA says it has never added fluoride to its water. Since July 1, 2025, Florida law has barred adding fluoride to public water systems, which doesn't change JEA's naturally occurring fluoride. Either way, brushing twice a day with fluoride toothpaste is still recommended for children and adults.

What is fluoride, and why is it in toothpaste?

Fluoride is a mineral found naturally in rocks, soil and water. It is added to toothpaste because it helps protect teeth against decay.

Bacteria in dental plaque use sugars from food and drinks to make acids. Those acids pull minerals out of enamel, the hard outer surface of your teeth. Repeated acid attacks can eventually cause cavities.

Fluoride helps enamel take minerals back up, a process called remineralization, and makes teeth more resistant to later acid attacks. Early decay can sometimes be stopped or reversed before a cavity forms. Once a hole has formed, toothpaste can't rebuild the tooth.

Does Jacksonville's drinking water contain fluoride?

Yes. Jacksonville residents served by JEA receive water with naturally occurring fluoride from the Floridan aquifer. JEA states that it does not add fluoride and never has.

Groundwater picks up minerals as it moves through underground rock, so fluoride can be present without being added during treatment. The amount can vary between water systems. Check JEA's water quality reports for tested levels rather than assuming every household gets the same amount.

If your home uses a private well or a different utility, check that source separately. JEA's information applies only to its own water.

What does Florida's 2025 fluoride law change?

In 2025, Florida passed SB 700, which took effect on July 1, 2025. Among other things, it prohibits adding substances to public water systems unless they are used to meet drinking water standards or otherwise improve water quality as the law defines it. In practice, this means Florida utilities can no longer add fluoride to drinking water.

For JEA customers, the law doesn't change what comes out of the tap, because JEA never added fluoride. It doesn't remove fluoride that occurs naturally. In other Florida communities that used to add fluoride, water levels may now be lower than before.

That makes daily fluoride toothpaste more important, not less, for anyone whose water contains little fluoride. If you've moved within Florida or aren't sure about your water, ask us about your own cavity risk.

Do I still need fluoride toothpaste if my water contains fluoride?

Yes. Fluoride in drinking water doesn't replace brushing with fluoride toothpaste. Toothpaste puts fluoride directly on the tooth surface, where decay begins. The American Dental Association recommends fluoride toothpaste even when drinking water contains fluoride.

Is fluoride toothpaste safe?

Fluoride toothpaste is recommended for routine cavity prevention when used as directed. Spit it out after brushing, and supervise young children so they don't swallow it.

For children, one concern is dental fluorosis. This is a change in enamel that can develop when a child repeatedly takes in too much fluoride while the teeth are still forming under the gums. Fluoride from all sources counts, not only toothpaste. Mild fluorosis usually looks like faint white lines or streaks on the teeth. Using the right amount of toothpaste and supervising brushing helps reduce the risk.

What about fluoride and other health concerns?

Fluoride research depends on the amount, source and length of exposure.

In 2024, the National Toxicology Program concluded with moderate confidence that higher fluoride exposure, such as drinking water with more than 1.5 milligrams per liter, is associated with lower IQ in children. An association doesn't prove cause and effect.

A later analysis also found associations at lower exposures in some studies, while noting uncertainty below 1.5 milligrams per liter. There weren't enough data to say whether water at 0.7 milligrams per liter affects children's IQ.

These findings deserve careful discussion. They don't show that brushing with fluoride toothpaste as directed causes these outcomes, and they don't settle every question about lower exposures.

How much fluoride toothpaste should children use?

Start brushing with fluoride toothpaste when the first tooth appears.

• Younger than age 3: a smear no larger than a grain of rice.

• Ages 3 to 6: no more than a pea-sized amount.

• Supervise brushing: help children brush thoroughly and teach them to spit out the toothpaste.

Keep toothpaste out of reach between brushings. Children younger than 6 shouldn't use fluoride mouthwash unless a dentist recommends it.

Before starting a fluoride supplement, talk with your child's dentist or pediatrician about your drinking water source and other fluoride exposure. Naturally occurring fluoride counts toward the total.

How do you choose the right toothpaste?

Start with a fluoride toothpaste made for cavity prevention. The ADA Seal of Acceptance is one way to find products that have been evaluated. Our toothpaste guide explains which ingredients matter.

Other symptoms matter too. Tooth sensitivity, repeated cavities and a persistently dry mouth are good reasons to review your home care with a dentist. Dry mouth raises cavity risk because saliva helps protect teeth, so toothpaste choice should be part of a plan that also looks at why your mouth is dry, including medications and medical conditions.

Common questions about fluoride toothpaste

Do adults benefit from fluoride toothpaste?

Yes. Adults still get cavities, including decay on exposed tooth roots. Brushing twice a day with fluoride toothpaste remains part of preventive care throughout adulthood.

Does fluoride toothpaste replace flossing?

No. Brushing and cleaning between the teeth reach different surfaces. Fluoride toothpaste helps prevent cavities, while daily cleaning between the teeth removes plaque where a toothbrush can't reach.

Can fluoride toothpaste repair a cavity?

It can help repair early mineral loss before a hole forms. An established cavity is permanent damage that needs a dental evaluation and usually a filling or other treatment.

Do I need extra fluoride if I have dry mouth?

Possibly. Extra fluoride applied to the teeth may make sense when dry mouth raises your decay risk. The recommendation should follow a look at your symptoms, medical history and dental findings. Our dry mouth page explains that approach.

Toothpaste and fluoride questions in Jacksonville

Your daily routine should fit your oral health, your medical history and your water source. At CJ Henley, DMD, we help patients with concerns such as repeated cavities, persistent dry mouth and tooth sensitivity. If you have questions about toothpaste or fluoride, contact our Jacksonville office at 3675 Hendricks Avenue or call 904-398-1549.

Sources

1. American Dental Association, MouthHealthy. Fluoride.

2. American Dental Association, MouthHealthy. Fluorosis.

3. National Institute of Dental and Craniofacial Research. Fluoride, The tooth decay process and Oral hygiene.

4. JEA. Water constituents and Water quality reports.

5. The Florida Senate. CS/CS/CS/SB 700 (2025), Department of Agriculture and Consumer Services. Chapter 2025-22, Laws of Florida.

6. National Toxicology Program. Fluoride: potential developmental neurotoxicity.

About the author. CJ Henley, DMD, is a general dentist in Jacksonville whose practice focuses on cosmetic and restorative dentistry, dental implants and dental care around head and neck cancer. Meet Dr. Henley.
CJ Henley, DMD, PA · 3675 Hendricks Avenue, Jacksonville, FL 32207 · 904-398-1549
Updated October 2026.

Best Foods for Healthy Teeth

A varied diet, water as your usual drink and fewer sugary snacks and drinks between meals support healthy teeth and gums. How often you snack matters as much as what you eat. Food choices work alongside brushing, cleaning between teeth and dental examinations. No food or supplement treats a cavity or replaces care for gum disease.

Which foods support healthy teeth and gums?

Build meals around a variety of vegetables, fruit, protein foods, and sources of calcium. Whole fruit usually makes a more useful snack than repeatedly sipping juice. Plain dairy foods or suitable fortified alternatives can contribute calcium. Check labels for added sugar. Choose foods that fit your medical needs, allergies, and ability to chew.

Why does how often I snack matter?

Repeated exposure to sugary drinks and snacks gives the mouth less time between acid challenges. Consider the pattern across your day, including sweetened coffee, sports drinks, juice, and foods that linger around teeth. Water with meals and between meals is a practical starting point. Read our sparkling-water guide if flavored or carbonated drinks are part of your routine. If your teeth are sensitive, our post on foods to avoid with sensitive teeth covers acidic and sugary triggers.

Can low vitamin C cause bleeding gums?

Severe vitamin C deficiency can affect gum health, but bleeding gums have several possible causes, including plaque-related inflammation. Do not assume that a supplement will solve the problem. A limited diet is worth discussing with your medical clinician, and persistent bleeding also deserves a dental examination. Peppers, kiwifruit, broccoli, and strawberries are examples of foods containing vitamin C.

Should I take vitamins for my teeth?

Discuss supplements with your clinician if you have a deficiency, restricted diet, medical condition, or difficulty eating. Taking extra vitamins without identifying a need is not a substitute for dental treatment. Bring a list of supplements and medications to your appointment, especially if you receive care for complex medical needs.

What else helps prevent cavities?

Brush with fluoride toothpaste and clean between teeth each day. Our toothpaste guide explains how to compare products. Dry mouth changes cavity risk, so tell us if eating or swallowing feels dry. See our dry-mouth information.

Discuss diet and dental health in Jacksonville

At CJ Henley, DMD on Hendricks Avenue near San Marco, a comprehensive examination can connect your food habits with what we find in your mouth. Call 904-398-1549 or contact the office for an appointment. Bring specific questions about snacks, drinks, bleeding, or sensitivity.

Sources

1. American Dental Association, MouthHealthy. Nutrition's impact on oral health.

2. American Dental Association, MouthHealthy. Bleeding gums.

3. National Institutes of Health, Office of Dietary Supplements. Vitamin C fact sheet for consumers.

4. American Dental Association, MouthHealthy. Dietary acids and your teeth. Accessed October 6, 2026.

About the author. CJ Henley, DMD, is a general dentist in Jacksonville whose practice focuses on cosmetic and restorative dentistry, dental implants and dental care around head and neck cancer. Meet Dr. Henley.
CJ Henley, DMD, PA · 3675 Hendricks Avenue, Jacksonville, FL 32207 · 904-398-1549
Updated October 2026.