Fluoride Action Network

Campaign to fluoridate Washington state – Part 3. Fluoridation statistics.

Source: Website: Water Fluoridation for a Healthy Washington | January 26th, 2022
Industry type: Delta Dental

This is #3 of 5 parts [#1, #2, #3, #4, #5] from this campaign website

sponsored by the Arcora Foundation. Online as of January 26, 2022.

Fluoride in tap water for healthy communities

Oral health significantly improves in communities where water fluoridation is present.

Tap water with fluoride at the right level helps adults and also seniors, who can be more susceptible to tooth decay. This is important since Medicare doesn’t cover most dental care costs, leaving seniors with no dental care or costly bills. People from generations born after fluoridation was commonly implemented in the United States don’t need dentures or costly implants as they reach old age.

Because water fluoridation protects and strengthens tooth enamel, it improves oral health even among people who brush their teeth daily and visit their dentists regularly. Many communities view water fluoridation as a highly cost-effective way to ensure that everyone benefits from better health.

Many communities view water fluoridation as a highly cost-effective way to ensure that everyone benefits from better health.”

Fluoridation in Washington

In Washington, public water systems began providing a good balance of fluoride in drinking water in the mid to late 1950s. Today, approximately 56% of Washingtonians who get their drinking water from community water systems are receiving fluoridated water. This is lower than the United States average of 73%. Some of Washington’s most populated areas, such as King, Snohomish, and Yakima counties have the right balance of fluoride to support good health. A few counties, mostly in Eastern Washington, have significant amounts of naturally occurring fluoride.

Reach out to your local water service to see if your community benefits from water fluoridation.

of Washingtonians receive fluoridated water from their community water systems.

Fluoridation by county

Hover over the map to see fluoridation rates by county
[the map gives the following percentages]

Adams County <33%
Asotin County <%
Benton County <33%
Challam County <33%
Clark County >66%
Clelan County <33%
Columbia County <33%
Douglas County <33%
Ferry County <33%
Franklin County >66%
Garfield County <33%
Grant County 33%-66%
Grays Harbor County 33%-66%
Island County 33%-66%
Jefferson County <33%
King County >66%
Kitsap County <33%
Kittitas County <66%
Klickitat County <33%
Lewis County 33%-66%
Mason County <33%
Okanogan County <33%
Pacific County <33%
Pend Oreille County <33%
Pierce County 33%-66%
San Juan County <33%
Skagit County <33%
Skamania County <33%
Snohomish County >66%
Spokane County <33%
Stevens County <33%
Wahkiakum County >66%
Walla Walla County <33%
Whatcom County <33%
Whitman County >66%
Yakima County >66%


of Americans’ community water systems are fluoridated. If you live in a state other than Washington, you can explore your community’s status at CDC.

Unfair access

All Washingtonians should be able to enjoy the health benefits that result from the optimal balance of fluoride in tap water. Unfortunately, the lack of access to fluoridation hurts mostly rural, low-income and underserved communities. This leaves thousands of children and adults needlessly suffering from oral health problems. It’s important that all communities get access to modern standards of water fluoridation. We have the opportunity to ensure that our kids don’t fall behind on oral health and are given a fair opportunity to grow healthy and thrive.


Studies show that water fluoridation reduces tooth decay by 30% among children of ages 4 to 17.

Water systems and beneficial levels

The state regulates the amount of fluoride that can be adjusted in water—within the levels recommended for beneficial health and safety.  If you want to know about fluoride in your drinking water, the best way is to ask your local water system or, if you live in Washington, the Washington State Department of Health. If you live in a state other than Washington, CDC’s My Water’s Fluoride is another resource for fluoride in tap water.

A good deal

The benefits of fluoridation far outweigh the modest costs of adjusting it in local water supplies. For every dollar most communities spend on water fluoridation, the average individual saves $20 in dental treatment per year. Fluoridation gives everyone in our communities an equal chance of enjoying a better quality of life.