Best Water Filters in Australia 2026

Not for safety, in most places. Mains water supplied in Australian cities is treated to the Australian Drinking Water Guidelines before it reaches the tap. What a home filter usually improves is taste — chlorine in particular — along with sediment or rust picked up from older plumbing. Tank, bore and some rural supplies are a different case, and that is where multi-stage or reverse-osmosis filtration earns its keep.

They tell you what was tested, and they are not interchangeable. NSF/ANSI 42 covers aesthetic effects such as chlorine taste and odour. 53 covers health-related contaminants including lead and cysts. 58 covers reverse osmosis systems. 372 — listed by the Waterdrop C1S here — certifies that the materials themselves are lead-free, not that the filter removes anything. A product described only as 'NSF certified' with no number has told you very little.

A jug or a gravity filter, because neither touches the plumbing. The Devanti 14L here runs entirely on gravity with no electricity and holds far more than a jug, and the BRITA Marella XL is a straightforward 3.5L jug that comes with four cartridges. Both move house with you, which under-sink systems do not.

It is a considered upgrade rather than a necessity on treated mains supply. RO pushes water through a very fine membrane — the Waterdrop WD-A2 lists 0.0001μm — which reduces dissolved solids that carbon filters leave behind. That matters most on tank or bore water, or if you specifically want PFAS reduction, where Waterdrop names PFOA and PFOS in its specification. Countertop units like the C1S avoid the drilling that under-sink RO requires.