Is My Tap Water Fluoridated? Zip Code Lookup
Is My Tap Water Fluoridated?
Enter your zip code to see area-level community water fluoridation data, sourced from the CDC's Water Fluoridation Reporting System.
How to read this, and where the numbers come from
This tool reports area-level estimates, not an exact reading for your address. Fluoridation is decided system by system, not zip code by zip code. A single zip can be served by more than one water system, and water systems don't line up neatly with zip code boundaries. What you're seeing is the share of the surrounding area's population on fluoridated water, based on the most recent data CDC has published for that area.
- Source data: CDC Water Fluoridation Reporting System, state and county statistics.
- County-level detail isn't published everywhere. Every state (plus DC) has at least a statewide figure, but CDC's county-level breakout only covers 38 states. Where your county isn't broken out, we show your state's overall figure and label it clearly as statewide rather than guessing at a county number.
- A small number of zip codes have no figure at all (about 1 in 80). These are mainly military (APO/FPO) addresses and a few U.S. territories that aren't part of this CDC dataset.
- For an exact answer, check your water utility's Consumer Confidence Report (usually mailed annually or posted on their website) or contact them directly. They are the authoritative source for what's actually in your tap.
- Want the fuller picture on fluoridation itself - the history, the health debate, and where things stand? Read our breakdown: To Fluoridate or Not: Berkey Water Filters Put You In Control.
Example Lookups
A snapshot of real results from this tool, showing the range of what you'll see: mostly county level figures, a few statewide only figures, and the occasional zip code with no CDC data at all.
Frequently Asked Questions
Is this an exact reading for my address?
No, this tool reports area level (county or statewide) estimates from CDC's Water Fluoridation Reporting System, not a reading for your specific address. Water systems don't line up with zip code boundaries, and a single zip code can be served by more than one system. For an exact answer, check your water utility's Consumer Confidence Report or contact them directly.
Where does this fluoridation data come from?
The estimates come from the CDC's Water Fluoridation Reporting System, cross referenced with GeoNames zip to county data. CDC publishes state level figures for every state and county level detail for 38 states. Where county detail isn't published, this tool shows the statewide figure instead.
Why does my result show a statewide percentage instead of a county percentage?
CDC's county level breakout only covers 38 states. If your state isn't one of them, this tool shows your state's overall fluoridation percentage, labeled clearly as statewide, rather than estimating a county number that CDC hasn't published.
What does it mean if my zip code shows no data at all?
About 1 in 80 zip codes in this tool's dataset have no figure available, mainly military (APO/FPO) addresses and a few U.S. territories that CDC's dataset doesn't cover. If that's your zip code, the CDC's My Water's Fluoride tool or your local water utility are the best next step.
How current is this data, and how often is it updated?
The figures come from CDC's most recently published Water Fluoridation Reporting System data, which CDC itself updates infrequently. We review this dataset roughly every six months and rebuild it whenever CDC publishes new numbers.
Does a higher fluoridation percentage mean the water isn't safe to drink?
Not on its own. A higher percentage simply means more of the area's population is served by a water system that adds fluoride, which municipalities do to support dental health. Whether to reduce your own fluoride exposure is a personal decision. We cover the fluoridation debate in more depth in our article, To Fluoridate or Not: Berkey Water Filters Put You In Control.
How can I reduce fluoride from my tap water at home?
Berkey systems fitted with PF-2 Fluoride and Arsenic Reduction Filters are designed to reduce fluoride from treated municipal or well water when paired with Black Berkey or Phoenix Filter Elements.
