Reverse Osmosis vs Carbon Filter: Which Is Right for Your Australian Home?

Reverse osmosis and carbon filtration are the two most common approaches to home water filtration in Australia. They do very different things. Here’s a plain comparison.

See our Reverse Osmosis Guide and our Benchtop Water Filters Guide.

What Each System Removes

Key Differences

Fluoride removal: The most important practical difference. Carbon filters do not remove fluoride. RO systems do. If fluoride removal is your priority, RO is the only practical option.

Minerals: RO removes all dissolved minerals, producing very pure but slightly acidic water. Most RO systems include a remineralisation stage to add minerals back. Carbon filters retain naturally occurring minerals.

Installation: Carbon benchtop filters require no plumbing. RO systems are typically under-sink and require a plumber.

Cost: Carbon filters have a lower upfront cost. RO systems cost more upfront but produce the highest quality filtered water.

Which Is Right for You?

Choose a carbon filter if: you want chlorine and taste improvement, you’re renting, or fluoride removal isn’t a priority. See our Benchtop Water Filters Guide.

Choose RO if: you want fluoride removal, the highest level of contaminant removal, or you’re a homeowner willing to invest in an under-sink system. See our Reverse Osmosis Guide.

Frequently Asked Questions