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GUIDES · FLUORIDE REDUCTION

Fluoride Reduction: What to Look For in a Water System

If you want to reduce fluoride, first check whether your utility still adds it: Florida changed state law on public-water additives in 2025, and Miami-Dade Water and Sewer stopped adding fluoride that year. Fluoride also occurs naturally at some level. Reverse osmosis is one of the most common home methods for reducing fluoride; standard carbon filters generally are not built for it. Whatever you choose, confirm the exact model is certified for fluoride reduction.

Step 1: Know what is in your water now

In 2025 Florida amended its statute on public water systems so that additives must meet the state's definition of a water quality additive (Section 403.859, Florida Statutes; see the Senate bill summary for CS/SB 700). Miami-Dade WASD reports it stopped adding fluoride effective May 29, 2025. Other utilities have announced their own changes. Fluoride can also be naturally present in source water.

Your utility's annual Water Quality Report (Consumer Confidence Report) lists fluoride results. A recent report reflects current practice better than an older one. Private well owners need their own test.

Step 2: Decide what you want, and where

This guide does not take a position on fluoride for or against; that is a personal decision, and questions about dental or medical effects belong with your dentist or doctor. If you want lower fluoride, most people only care about drinking and cooking water, which is why a point-of-use system at the kitchen is the common choice rather than whole-home treatment.

Treatment types used for fluoride

MethodNotes
Reverse osmosisA common point-of-use method; certified models list fluoride under NSF/ANSI 58
Activated aluminaSpecialized media used for fluoride; performance depends on pH and contact time
DistillationReduces many dissolved minerals; slow and uses energy
Standard activated carbonBuilt for chlorine, taste and odor; not a fluoride method

Living Water offers alkaline reverse osmosis under-sink systems. As with any system, check the exact model's listing for fluoride before relying on it. See alkaline vs standard RO.

How to verify a fluoride claim

  1. Get the full model number of the system and its membrane.
  2. Look it up in an independent certifier's listing, such as the NSF database for drinking water treatment units.
  3. Confirm "fluoride" appears as a certified reduction claim, not just in marketing.
  4. Check the conditions: some claims assume particular pressure or water chemistry.

Keep it working

RO membranes and pre-filters wear over time, and reduction drops when they are overdue. A TDS meter reading at the RO faucet compared with the tap is an easy check between services. See how often to replace RO filters and RO operating costs.

Questions to ask a provider

  • Which exact model and membrane are you proposing, and where is its fluoride listing?
  • What pressure does my home have, and does the system need a booster pump?
  • What is the replacement schedule for pre-filters, membrane and post-filter?
  • Does the alkaline stage change any certified claims?
  • How will I check performance between services?

Jorge gives you an itemized quote after the free test, with these answers in writing.

Updated 2026-10-17 · Living Waters · Jorge Canela, Water Quality Specialist

Common questions

Does my city water still have fluoride added?

It depends on your utility. Florida changed its additive law in 2025 and Miami-Dade WASD stopped adding fluoride that year. Check your utility's latest Water Quality Report.

Do carbon filters remove fluoride?

Standard activated carbon is not designed for fluoride. Reverse osmosis and activated alumina are the more common methods.

Does reverse osmosis remove fluoride?

Many RO systems are certified to reduce fluoride under NSF/ANSI 58. Check the exact model's listing.

Do I need whole-house fluoride treatment?

Most people who want less fluoride only treat drinking and cooking water, so a point-of-use system is the usual choice.

Is fluoride naturally in water?

Fluoride can occur naturally in source water at varying levels. Your Water Quality Report or a well test shows the amount.

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