If you live in Concord and have ever wondered whether the tap water your child drinks every day contains fluoride — you are asking exactly the right question. Fluoride in drinking water is one of the most studied and cost-effective public health measures for preventing tooth decay, and knowing what is in your local water supply helps you make informed decisions about your child’s dental care.

Here is a straightforward answer for Concord families, along with everything parents should know about fluoride, water, and children’s teeth.

Is Concord’s water fluoridated?

Yes. Concord, California receives its water primarily through the Contra Costa Water District, which serves the majority of Central Contra Costa County. The Contra Costa Water District adjusts fluoride levels in the water supply to meet the recommendation set by the U.S. Public Health Service — currently 0.7 milligrams per liter (mg/L), or 0.7 parts per million (ppm).

This level was updated in 2015 from the previous range of 0.7 to 1.2 ppm, based on updated research balancing cavity prevention with minimizing the risk of mild dental fluorosis. At 0.7 ppm, community water fluoridation is considered both safe and effective by the American Dental Association, the American Academy of Pediatrics, and the American Academy of Pediatric Dentistry.

What does fluoride in water actually do?

Fluoride works by strengthening tooth enamel at a molecular level. When teeth are exposed to fluoride — whether through drinking water, toothpaste, or professional treatments — the mineral gets incorporated into the enamel structure, making it harder and more resistant to acid attack.

The bacteria that cause cavities produce acid when they metabolize sugar. That acid dissolves enamel in a process called demineralization. Fluoride helps reverse early demineralization and makes enamel significantly more resistant to future acid exposure — a process called remineralization.

Community water fluoridation works passively. Children benefit from it simply by drinking water, without any additional effort. According to the Centers for Disease Control and Prevention, community water fluoridation reduces tooth decay by about 25 percent in children and adults.

Does my child still need fluoride toothpaste if the water is fluoridated?

Yes. Water fluoridation and fluoride toothpaste work through different mechanisms and provide different types of protection. Fluoridated water provides a systemic and topical benefit — it strengthens developing teeth from within and also bathes teeth in low-level fluoride throughout the day.

Fluoride toothpaste delivers a more concentrated topical dose directly to the tooth surface twice daily during brushing. The two work together rather than duplicating each other.

The AAPD recommends:

  • Children under 3: a smear of fluoride toothpaste the size of a grain of rice, twice daily
  • Children 3 to 6: a pea-sized amount of fluoride toothpaste, twice daily
  • Children 6 and older: a pea-sized to standard amount, with supervision until the child can reliably spit rather than swallow

What about fluorosis? Is Concord’s water level safe?

Dental fluorosis — white spots or streaks on the enamel — can occur when children consume too much fluoride during the years when teeth are still developing beneath the gums, typically from birth to around age eight. The most common cause of mild fluorosis in the United States is swallowing toothpaste rather than excess fluoride in water.

At Concord’s current water fluoride level of 0.7 ppm, the risk of fluorosis is very low. The level is deliberately set to provide cavity prevention benefits while staying well below the threshold associated with significant fluorosis. Mild fluorosis, when it does occur at this level, is typically cosmetic only — faint white lines that are not harmful to the tooth.

The risk is further minimized by using age-appropriate amounts of toothpaste and teaching children to spit rather than swallow. If you have specific concerns about your child’s fluoride exposure, it is always worth discussing them with Dr. Yasmine Zaeni at your next visit.

What if we use a water filter at home?

This is an important question that many Concord families do not think to ask. Standard pitcher filters like Brita and most refrigerator filters do not remove fluoride from water. However, reverse osmosis systems — which are increasingly common in California homes — do remove fluoride, sometimes significantly.

If your home uses a reverse osmosis filtration system, your child may not be getting the fluoride benefit from tap water that you assume they are. In that case, it is especially important to ensure they are using fluoride toothpaste consistently and to discuss whether additional fluoride supplementation is appropriate with your pediatric dentist.

Bottled water is another variable. Most bottled water either contains no fluoride or does not list fluoride content clearly. Children who drink primarily bottled water are typically not getting meaningful fluoride from their water source.

Does fluoridated water replace professional fluoride treatments?

No. Professional fluoride treatments provided at dental visits — typically in the form of a varnish applied directly to the teeth — deliver a significantly higher concentration of fluoride than drinking water. They are especially beneficial for children at higher cavity risk.

The AAPD recommends professional fluoride varnish applications at least twice per year for children, and more frequently for those with elevated cavity risk. Even in a community with fluoridated water like Concord, professional fluoride treatments provide an additional layer of protection that water alone does not replicate.

At Hopscotch Children’s Dentistry, fluoride varnish is a standard part of our routine dental care visits for children who benefit from it. We assess each child’s individual risk and make recommendations accordingly.

A note on recent online claims about fluoride

In recent years, fluoride has become the subject of considerable online debate — some of it misleading. Claims that fluoride at community water levels causes neurodevelopmental harm, affects IQ, or disrupts hormone systems are not supported by the scientific consensus at the 0.7 ppm level used in Concord’s water supply.

The major pediatric and dental health organizations in the United States — including the AAPD, ADA, AAP, and CDC — continue to support community water fluoridation as safe and effective at current recommended levels. If you have specific concerns about fluoride, we encourage you to bring them to your child’s dental visit, where we can address them with evidence-based information specific to your child’s situation.

Pediatric dental services in Concord

Questions about fluoride and your child’s dental health?

Our team at Hopscotch Children’s Dentistry in Concord is always happy to talk through the specifics — no question is too small.

📞 925-254-4777
📧 hello@hopscotchdental.com
🌐 hopscotchdental.com

Clean water and healthy teeth — two things every Concord family deserves to feel confident about. 💙