How Home Water Filtration Affects Your Health: What the Evidence Says

There’s a lot of marketing noise around water filtration and health. Here’s what the evidence actually supports — and what’s worth being sceptical about.

Browse our Benchtop Water Filters Guide or our Whole House Water Filters Guide.

What Filtered Water Actually Removes

Australian town water is treated to meet the Australian Drinking Water Guidelines and is safe to drink. A quality home filter improves on that baseline by removing:

• Chlorine and chloramines — used for disinfection, but associated with dry skin and hair with daily shower exposure, and an unpleasant taste in drinking water
• Heavy metals (lead, copper, mercury) — can enter water from older plumbing. KDF media removes these effectively
• Sediment and rust — from ageing pipes and infrastructure
• Bacteria and protozoa — ceramic filtration stages physically block Giardia and Cryptosporidium

What the Evidence Supports

Better hydration through better taste: People drink more water when it tastes better. This is well-supported — removing chlorine taste and smell makes filtered water noticeably more palatable, which supports adequate daily hydration.

Reduced chlorine exposure in the shower: Hot water vaporises chlorine, and daily shower exposure contributes to skin dryness and irritation for many people. A shower filter reduces this exposure. See our Shower Filters Guide.

Reduced heavy metal exposure: For households with older plumbing (pre-1970s copper or lead pipes), a filter that removes heavy metals is a meaningful health precaution.

What to Be Sceptical Of

Claims that filtered water “boosts immunity”, “cures disease”, or provides dramatic health transformations are not supported by evidence. Filtered water is cleaner water — that’s genuinely valuable, but it’s not medicine. Be wary of any filter marketed with dramatic health claims.

Frequently Asked Questions