Does a Water Filter Remove Fluoride? Which Fluoride Filter Works
Most do not. The carbon in a jug, a fridge filter or a whole house system is built for chlorine taste and smell, and it leaves the fluoride in. Filters that do remove it use reverse osmosis, activated alumina, ion exchange or distillation. Here is how much fluoride Sydney Water adds, what the national and state health authorities say about it, and how to choose if you decide to take it out.
Sydney Water targets 1.0 mg/L of fluoride, and NHMRC and NSW Health both back fluoridation as safe and effective for teeth. Removing it is your choice rather than a health need. If you choose to, you need a filter built for fluoride, fitted at the drinking tap.
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Talk to a licensed plumber about an under-sink filterHow Much Fluoride Is in Sydney Water
Sydney Water adds small amounts of fluoride as the final step of treatment, under the Fluoridation of Public Water Supplies Act 1957 and NSW Health's code of practice. Sydney has been fluoridated since 1968.
The Target
The NSW Code of Practice sets an operating target of 1.00 mg/L, with more than 95% of samples each year to fall between 0.90 and 1.50 mg/L. It also says consumers should not receive fluoride concentrations over 1.5 mg/L.Source: NSW Code of Practice for Fluoridation of Public Water Supplies, NSW Health
The National Range
NHMRC supports states and territories fluoridating within 0.6 to 1.1 mg/L, with each state's health authority setting its operating level. The national guideline value for fluoride in drinking water is 1.5 mg/L.Sources: NHMRC Public Statement 2017; Sydney Water quarterly water quality reports
What Comes Out of Your Tap
Sydney Water's water analysis tool gives an average fluoride value for each delivery system. Across the 13 we looked up, the averages ran from 0.93 to 0.99 mg/L, right around the target.Source: Sydney Water, water analysis, retrieved 24 September 2026
Fluoride in Sydney water: the target, the allowed ranges and what comes out of the tap (mg/L)
Sources: NHMRC Public Statement 2017, Water Fluoridation and Human Health in Australia; NSW Code of Practice for Fluoridation of Public Water Supplies (NSW Health, April 2018); Sydney Water quarterly drinking water quality reports, April to June 2026; average fluoride by delivery system from Sydney Water's water analysis tool, retrieved 24 September 2026.
What NHMRC and NSW Health Say About Fluoride
This is the official position in Australia, in the health authorities' own words. We are plumbers, not dentists, so we pass it on as written.
NHMRC's 2017 public statement reads: "NHMRC strongly recommends community water fluoridation as a safe, effective and ethical way to help reduce tooth decay across the population." Its review found water fluoridation reduces tooth decay by 26% to 44% in children and adolescents, and by 27% in adults.
On safety, the statement says there is reliable evidence that community water fluoridation at current Australian levels is not associated with cancer, Down syndrome, cognitive dysfunction, lowered intelligence or hip fracture. NHMRC's current web page adds that there is no reliable evidence that water fluoridation at current Australian levels causes health problems. On dental fluorosis, the white marks too much fluoride can leave on teeth, NHMRC says almost all cases in Australia are very mild or mild and not of aesthetic concern.
NSW Health supports fluoridation of drinking water as a safe and effective way to help prevent tooth decay in the community. You may read about studies from overseas. NHMRC notes that overseas studies suggesting a possible link with intelligence took place in countries where fluoride levels greatly exceed those seen in Australia.
Does a Standard Water Filter Remove Fluoride?
No, or not for long. Carbon filters are made to take out chlorine taste and smell, and fluoride is a different kind of chemical.
A 2008 study in the Journal of the Canadian Dental Association measured it directly. An activated carbon filter reduced the fluoride in tap water only for the first 8 litres, and a hollow-fibre membrane filter did not change the fluoride level at all. The authors concluded that households using these filters should not need extra fluoride, because the filters leave it in the water.
Activated carbon is the working part of the filters most people buy for taste: jugs, fridge filters, tap-mounted filters and whole house carbon systems all use it. It also explains a common surprise. NHMRC notes that fluoride has no taste or smell, so a filter that makes your water taste better has not done it by taking the fluoride out.
Filters That Do Remove Fluoride
NHMRC lists the technologies that work: distillers and filtering systems containing ion exchange resins, activated aluminium or reverse osmosis membranes have been shown to be effective and will remove most of the fluoride from water.
If you decide to remove fluoride, we would point you to an under-sink reverse osmosis unit at the kitchen tap. It also removed PFAS almost completely in a 2020 study of home filters, so one unit covers both if both matter to you. Check that the fluoride reduction claim is on the product's certificate: Australian Standard AS 3497 requires performance claims to be certified to NSF/ANSI standards.
| Filter type | Removes fluoride? | Source |
|---|---|---|
| Jug, fridge or tap-mounted carbon filter | Little or none | Konno et al., 2008: activated carbon |
| Whole house carbon filter | Little or none | Konno et al., 2008: activated carbon |
| Hollow-fibre membrane filter | No change | Konno et al., 2008 |
| Under-sink reverse osmosis | Removes most | NHMRC |
| Activated alumina | Removes most | NHMRC (listed as activated aluminium) |
| Ion exchange resin system | Removes most | NHMRC |
| Distiller | Removes most | NHMRC |
Should You Remove Fluoride? The Official Answer, and Your Choice
NHMRC answers the question directly, and it also says the choice is yours.
The Official Answer
"The optimum fluoride level in public drinking water supplies is a safe and effective way of helping to protect teeth against dental decay, and it is not necessary or desirable to remove the fluoride."Source: NHMRC, Water Fluoridation and Human Health in Australia: Questions and Answers
Your Choice
NHMRC also says people are free to choose whether or not to drink fluoridated water supplied to them, and that avoiding it takes some effort and expense: bottled water, rainwater tanks or specifically designed filters.Source: NHMRC, Questions and Answers
Our Position
We will not tell you fluoride is dangerous, because the national and state health authorities say it is not. If you still want it out of your drinking water, choose a filter certified to reduce fluoride rather than one that cannot, and have it fitted by a licensed plumber. If you are weighing it up for children, a dental professional is the right person to ask.
Fluoride Is Not PFAS
The two get mixed up because both names start with fluor. They are different chemicals, and filters treat them differently.
Fluoride
The fluoride ion, added in small amounts to protect teeth, at a target of 1.0 mg/L in Sydney. Carbon filters leave it in; reverse osmosis takes most of it out.
PFAS
A family of manufactured chemicals. NHMRC notes PFAS contain fluorine atoms but not the fluoride ion. Sydney's latest results sit below the national guideline values. Read PFAS in Sydney water for the numbers.Source: NHMRC, PFAS questions and answers
The Trade-Off
A reverse osmosis unit fitted for PFAS will also take out most of the fluoride. NHMRC points out that home filters can reduce beneficial chemicals in drinking water, fluoride among them.Source: NHMRC, PFAS questions and answers
Tank Water, Bottled Water and Babies
A few everyday situations where fluoride comes up, with what NHMRC says about each.
- Rainwater tanks. Rainwater collected in domestic tanks will not contain fluoride. NHMRC suggests people relying on tank water ask a dental professional about fluoride. See our guide on rainwater tank filters for drinking water.
- Bottled water. In most cases it is not fluoridated. Australian food rules allow fluoride to be added between 0.6 and 1 mg/L, and it must be labelled.
- Infant formula. Infant formula sold in Australia is safe to feed to infants when made up with water fluoridated at the levels used in Australia.
- Pregnancy and breastfeeding. NHMRC says it is safe for the unborn child and infant when pregnant and breastfeeding mothers drink water fluoridated at Australian levels.
Fluoride and Water Filter FAQs
Is there fluoride in Sydney water?
Yes. Sydney Water adds fluoride to a target of 1.0 mg/L under the NSW Code of Practice, and its water analysis tool shows averages of 0.93 to 0.99 mg/L across the delivery systems we looked up.
Does a jug filter remove fluoride?
Not meaningfully. A 2008 study found an activated carbon filter reduced fluoride in tap water only for the first 8 litres. Unless a jug is certified for fluoride reduction, assume it leaves the fluoride in.
Does reverse osmosis remove fluoride?
Yes. NHMRC says reverse osmosis membranes have been shown to be effective and will remove most of the fluoride from water.
Does a whole house water filter remove fluoride?
A whole house carbon filter does not. It is built for chlorine taste and smell. If you want fluoride out of your drinking water, fit a fluoride filter such as reverse osmosis at the kitchen tap.
Is fluoride in tap water safe?
NHMRC and NSW Health both say yes at Australian levels. NHMRC found no reliable evidence that water fluoridation at current Australian levels causes health problems.
Does rainwater tank water have fluoride?
No. NHMRC says rainwater collected in domestic tanks will not contain fluoride.
Can I use fluoridated tap water for baby formula?
NHMRC says infant formula sold in Australia is safe to feed to infants when made up with water fluoridated at the levels used in Australia.
Related: Water filter installation · Whole house water filters · Is Sydney tap water safe to drink? · PFAS in Sydney water · Rainwater tank filters for drinking water · Filter tap or under-sink filter?
