Chloramine water filters: what actually works in Australia

Chloramine is chlorine bonded to ammonia. Utilities use it because it lasts longer in long pipe networks, which is exactly why it is harder to filter out: it does not smell as strongly, it does not gas off, and the two or three seconds water spends in an ordinary carbon filter are not enough to break it down. Most filters sold as “removes chlorine” reduce chloramine only partially.

Do you have it?

If you are in Brisbane, Ipswich, Logan or Moreton Bay, yes. Two parts of south-east Queensland are not, and we had them wrong until we read the utilities’ own figures: the Gold Coast’s 2024–25 Drinking Water Service Annual Report says its network is disinfected with chlorine, and Unitywater’s published results for the Sunshine Coast and Noosa show free chlorine with monochloramine below detection. So Gold Coast and Sunshine Coast readers can use standard filters; the postcode lookup sorts this out in a second. Adelaide’s metropolitan supply, yes. Melbourne’s western and outer growth suburbs, yes; the inner east, no. Sydney and Perth use free chlorine. Our city pages go through each: Brisbane, Adelaide, Melbourne, Sydney, Perth, and the side-by-side comparison. If your water is plain chlorine, a normal filter is fine and you can stop reading.

The media that works

Catalytic carbon is activated carbon treated to speed up the chloramine reaction. It is the standard answer in drinking-water filters, where contact time is long enough. Chloramine-rated carbon blocks are dense blocks of it; the Matrikx CTO is one. KDF helps with free chlorine and metals but only partly with chloramine. Vitamin C neutralises chloramine instantly and is the shower answer, because in a shower there is no contact time to work with. Plain coconut-shell carbon, which is what most jugs and cheap under-sink cartridges use, is the media that struggles.

Drinking tap: under-sink

Take the WaterMark-listed Stefani triple housing from Bunnings at $188 and put a chloramine-rated cartridge in it: the Matrikx CTO carbon block, or the Envig 4C catalytic carbon composite. That route keeps you on standard 10 inch cartridges from any brand, and a licensed plumber can fit the housing. Change chloramine cartridges on the shorter of the two schedules on the box; chloramine capacity is always lower than chlorine capacity.

Drinking tap: reverse osmosis

Reverse osmosis removes the widest range of things, but the membrane is attacked by chloramine, so the pre-filters do the chloramine work. Choose a WaterMark-listed system such as the Philips 75 GPD station ($499 at Bunnings), and check the manual for how much carbon sits ahead of the membrane: two carbon stages is the minimum we would want. The cheaper Geekpure and iSpring kits sold online aren’t WaterMark-listed, so a licensed plumber can’t install them. On chloraminated water, budget for changing the carbon pre-filters every six months rather than twelve, and consider swapping the first carbon stage for a catalytic cartridge. Our reverse osmosis guide and countertop RO guide cover the systems in full.

Shower

Nothing with carbon or KDF does much at shower flow rates. The Quoss universal filter uses vitamin C cartridges and is the one to buy: Bunnings sells it as a Special Order, and Amazon delivers it. The full reasoning is in our chloramine shower filter guide and the vitamin C versus KDF comparison.

Whole house

This is the high-ticket answer and the one that makes sense if you want chloramine out of every shower, the laundry and the kitchen at once. Build it from WaterMark-listed housings: the Stefani twin whole-of-house from Bunnings at $412 (licence 022200) uses standard 4.5 x 10 inch big-blue housings, and you put sediment in the first and a catalytic carbon cartridge in the second. For 20 inch housings, the Home Master radial-flow catalytic carbon cartridge is a full catalytic cartridge rather than a composite. Bunnings also sells the 20 inch Stefani twin for $492, also WaterMark-listed, if you want longer cartridge life.

Tank-style catalytic carbon units, such as the Tier1 whole-house chloramine filter listed on Amazon, hold years of media in one pressure vessel with no cartridges to change. They are a US import, and we found no Tier1 listing on the WaterMark register (checked 21 October 2026), so a licensed plumber can’t install one.

Whole-house means mains plumbing: a licensed plumber, WaterMark-certified housings, and a bypass loop. Read the whole-house guide for sizing and installation.

What it costs

Bunnings prices, checked 21 October 2026. Amazon prices change, so we don’t quote them.

The picks

Start with the kitchen: the Stefani triple with a Matrikx block, which is WaterMark-listed and takes standard cartridges. Go reverse osmosis if you also want fluoride and dissolved solids out, and treat the pre-filters as the chloramine stage. Buy the Quoss for the shower. Go whole-house only when you want it out of every tap, with the Bunnings Stefani housings and a catalytic cartridge in the second stage.

The competition

We checked these on 21 October 2026. None is on the WaterMark register, so a licensed plumber can’t install them.

• Frizzlife SK99 (Amazon Australia). A direct-connect under-sink filter whose listing claims chloramine reduction; its NSF/ANSI 42 listing covers chlorine and particulates only.
• iSpring WCB32C-KS (Amazon Australia). A ready-made three-stage 20 inch whole-house system whose listing names chloramine, lead and PFAS.
• Geekpure 5-stage RO (Amazon Australia). Two carbon stages ahead of the membrane, at a low price.