Water Filters That Do NOT Remove Fluoride? Learn More Here!

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There are several different types of water filters are available.

Some are designed to remove fluoride, while others don’t.

This article discusses the latter: Water filters that do NOT remove fluoride.

Key Takeaways

  • Sediment filters, activated carbon filters, catalytic carbon filters, ion exchange filters, KDF filters, oxidation filters, ultrafiltration, and UV water purifiers do not remove fluoride.
  • Water treatment methods that do remove fluoride are reverse osmosis, water distillation, and activated alumina and bone char filtration.

Types of Water Filters That Do Not Remove Fluoride

The only water treatment methods suited for removing fluoride are

All other types of water filters/filtration methods do not remove fluoride.

You should note that although they are not effective on fluoride, they may still filter out other, perhaps more harmful, impurities and contaminants.

water filter cartridges and membranes

Sediment Filters

These filters remove larger particles from water, such as sand, dirt, or rust. They work by trapping the contaminants in a mesh or paper filter. Because fluoride particles are much smaller, sediment filters will not be able to remove them from your water.

Sediment filters are usually used as a pre-filter to remove larger particles before they reach the primary treatment stage. They can help prolong the life of your other filters and improve the overall quality of your water. While sediment filters are inexpensive compared to other filters, you’ll need to replace them more often.

Activated Carbon Filters

Activated carbon filters are one of the most popular types of water filters. They adsorb numerous contaminants onto their surface.

Aside from effectively removing many contaminants, including chlorine, pesticides, and volatile organic compounds (VOCs), these filters eliminate bad odor and taste from water. However, they are not recommended for removing fluoride.

Catalytic Carbon Filters

Catalytic carbon – a specific chemical process alters the carbon’s structure and increases its catalytic capability.

Catalytic carbon filters effectively remove chloramines aside from all the chemicals that are also reduced by regular activated carbon.

Ion Exchange Filters

Ion exchange filters work by exchanging ions in the water with ions bound to the filter.

This process can typically remove inorganic substances, like arsenic and sulfate, and help treat hardness in water. Some ion exchange filters can reduce fluoride – but only in small amounts.

KDF Filters

​​KDF filters feature a redox (oxidation-reduction) process to remove a wide range of contaminants.

For example, KDF-55 filter media can remove chlorine, lead, and mercury, while KDF-85 filter media can reduce iron and hydrogen sulfide. They are typically not as effective at removing fluoride.

These filters pair well with other types, such as sediment or carbon filters.

Oxidation Filters

Oxidation filters are also known as iron filters since they are most often used to remove iron from water. The way they work is by converting soluble ferrous iron into solid ferric (rust) through oxidation; the rust then clings to the filter media, where it is eventually flushed out.

Water that is high in iron usually also has high levels of manganese and sulfur, and oxidation filters can also remove them. Unfortunately, these filters have proven ineffective against fluoride.


Ultrafiltration uses a single membrane with tiny pores to physically remove contaminants from water. These filters can be used to remove impurities like bacteria and viruses. Some ultrafiltration filters can partially remove lead from water too.

However, ultrafiltration cannot eliminate fluoride from water as the latter is a dissolved solid. You may need to use another filter in tandem with this to purify water further.

UV Water Purifiers

UV Water purifiers are technically not water filters but are often used in conjunction with them. They use UV light to kill living microorganisms like bacteria and viruses. Since fluoride is in a different category, UV light won’t affect it.

UV water purifiers are a popular choice because they are chemical-free and easy to use. They are also less expensive than some other types of filters.

If you have any questions about water filters that do not remove fluoride please don’t hesitate to leave a comment below!

About the Author Gene Fitzgerald

Gene Fitzgerald is one of the founders of BOS and currently head of content creation. She has 8+ years of experience as a water treatment specialist under her belt making her our senior scientist. Outside of BOS, Gene loves reading books on philosophy & social issues, making music, and hiking.
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