Perth tap water is among the most heavily chlorinated in Australia. Here's what that means for your body — and what changes when you filter it.
Chlorine, chloramines, disinfection byproducts and heavy metals don't just affect the taste of your water — they affect your body. Here's what the research says about the health benefits of switching to filtered water at home.
The most consistent finding in filtration research is simple: when water tastes and smells better, people drink more of it. Proper hydration supports energy levels, cognitive function, digestion, kidney health, and body temperature regulation. Filtered water removes the chlorine smell and taste that puts many Perth residents off drinking straight from the tap.
Chlorine is added to Perth's water supply to kill bacteria during the long journey through pipes to your home. It's necessary at the treatment plant — but by the time it reaches your tap, its job is done. Consuming chlorine and chloramines long-term has been associated with disruption to gut bacteria and potential links to certain cancers, though research is ongoing. A carbon filter removes virtually all chlorine at the point of use.
Every shower is a full-body exposure to chlorinated water. Chlorine strips natural oils from skin and hair, contributing to dryness, irritation, and for people with sensitive skin or conditions like eczema, can worsen symptoms noticeably. A whole-home filter treats shower water as well as drinking water — many customers report a noticeable difference in skin and hair health within weeks of installation.
When chlorine reacts with organic matter in water it forms disinfection byproducts (DBPs), including trihalomethanes (THMs) and haloacetic acids (HAAs). These compounds are present in Perth tap water and are classified as possible carcinogens. While levels in Perth's water meet Australian standards, reducing long-term exposure through home filtration is a reasonable precaution many families choose to take.
Chlorine doesn't distinguish between harmful bacteria and the beneficial gut bacteria your digestive system depends on. Regular consumption of chlorinated water may affect the balance of gut microbiome over time. Filtered water gives your digestive system a cleaner input, which supports healthy gut function and reduces the risk of gastrointestinal irritation.
Infants, young children, pregnant women, and people with compromised immune systems are more sensitive to water contaminants. Reverse osmosis water is widely recommended for infant formula preparation as it removes fluoride, nitrates, and heavy metals that, while within legal limits for adults, are best minimised for the very young. Filtered water gives vulnerable household members a safer baseline.
Perth sources water from dams, groundwater, and desalination. The long distribution network requires higher chlorine doses to keep water safe in transit. By the time it reaches inner-north Perth homes, chlorine levels can be noticeably higher than in cities with shorter supply chains.
Perth tap water meets Australian Drinking Water Guidelines and is safe. We're not here to scare you. What we will say is that "safe" and "optimal" aren't the same thing, and many Perth families find that filtered water simply makes a noticeable difference to how their water tastes, feels, and affects their daily lives.
The most reliable way to understand your specific water quality is to review your suburb's Water Corporation annual water quality report — we'll guide you to yours during your free consultation. We'll always give you an honest assessment of what filtration would and wouldn't improve for your household.