"Safe" and "what you prefer to drink" aren't always the same thing. Perth water contains chlorine (not chloramine), fluoride at 0.7–1.0 mg/L, and hard water minerals from its groundwater and desalinated blend. None of these are a health emergency at typical levels, but many people filter them out anyway — for taste, personal preference, or to reduce mineral scale on appliances.
Perth has a unique integrated water supply blending four sources: groundwater (45%), desalinated seawater (36%), rainfall runoff into dams (19%), and groundwater replenishment (1%). This mix gives Perth climate-independent water security but also contributes to harder, mineral-rich tap water.
Primary sources
45% desalinated seawater from the Kwinana (Perth Seawater) and Binningup desalination plants uses reverse osmosis to remove salt and impurities. 40% groundwater comes from six groundwater treatment plants tapping into Western Australia's aquifer network. 15% surface water is collected by 15 interconnected dams including the Wungong, Stirling, and Harvey dams in the Darling Range. This unique blend makes Perth one of the few Australian cities with a climate-independent water supply.
Perth's water journey
From desalination plants and aquifers to treatment facilities and your tap — here's how Perth's water is collected, treated, and delivered to over 2.5 million people.
Water comes from groundwater aquifers (45%), seawater desalination (36%), rainfall runoff into dams (19%), and groundwater replenishment (1%). This diverse mix provides year-round supply independent of rainfall.
Water is treated at six groundwater treatment plants and two desalination plants. Desalinated water undergoes reverse osmosis; groundwater undergoes carbon filtration, chlorination, and remineralisation.
Treated water moves through Water Corporation's 35,000 km of water mains spanning Perth, Peel, and regional Western Australia. Pressure is maintained by 17,000+ km of associated infrastructure.
Chlorine (not chloramine) is added at 0.4–1.0 mg/L to protect water from bacterial growth in warm climate and long-distance distribution. This is essential for WA's hot, dry conditions.
Treated water travels to over 2.5 million people across Perth, Peel, and parts of regional WA. The system maintains consistent pressure and quality throughout the network.
Your tap receives treated, chlorinated water with mineral content of 50–200 mg/L. For reduced hardness and chlorine taste, add a Tapp filter as the final step.
Here are the main parameters Water Corporation monitors and reports:
Note on chlorine vs. chloramine: Perth uses chlorine (not chloramine) for disinfection. In Western Australia's warm climate with long distribution distances, chlorine is more effective at maintaining water safety throughout the network. Chlorine requires more frequent monitoring but provides better protection in hot conditions.
PFAS (per- and polyfluoroalkyl substances) are "forever chemicals" used in non-stick coatings, firefighting foams, and food packaging. They persist in water and bioaccumulate.
What's being done: Water Corporation actively monitors PFAS at treatment plants and distribution points. The desalination plants' reverse osmosis process naturally removes PFAS from seawater inputs.
For personal filtering: Tappwater's EcoPro Compact and SMR tap filters remove 93% of PFAS via activated carbon nanofiltration. For maximum PFAS removal (99%), the RO Countertop uses reverse osmosis — the most effective consumer technology available.
Perth has moderately hard water (50–200 mg/L, average hardness of ~100 mg/L — varies widely by suburb). For reference:
- Soft: 0–60 mg/L (Sydney: 43 mg/L)
- Moderately hard: 60–200 mg/L (Perth falls here)
- Hard: >200 mg/L
Perth's hardness comes from its groundwater sources (45% of supply) rich in calcium and magnesium. The blend with desalinated seawater (36%) helps soften it, but Perth's water remains harder than Sydney (~43 mg/L) or Melbourne (~20 mg/L) — leading to more scale buildup on appliances and fixtures, especially in northern suburbs.
Perth's water is safe, but you might filter for taste, chlorine removal, hardness reduction, or fluoride preference. It depends what you want to remove.
EcoPro Compact
5-stage nanofiltration. Removes chlorine, 93% PFAS, 70% fluoride, and >99% microplastics.
EcoPro Chrome SMR™
Same 5-stage filtration plus Swedish Mineral Rock™ — adds calcium, magnesium, and potassium.
RO Countertop
7-stage reverse osmosis. Removes virtually everything including fluoride, PFAS, lead, and heavy metals.
If Perth's water meets the guidelines already, why filter? Personal preference. Here's how to choose:
| Filter | Chlorine | Fluoride | PFAS | Microplastics | Price | Best for |
|---|---|---|---|---|---|---|
| EcoPro Compact | >97% | 70% | 93% | >99% | $109.99 | Best value |
| EcoPro Chrome SMR™ | >99% | 70% | 93% | >99% | $149.99 | Taste + minerals |
| RO Countertop | >99% | >99% | 99% | >99% | $799.99 | Maximum protection |
Use this table to compare what each Tappwater filter removes from Perth's water:
| Contaminant | In Perth Water | Compact | SMR | RO Countertop |
|---|---|---|---|---|
| Chlorine | 0.4–1.0 mg/L | >97% | >99% | >99% |
| Fluoride | 0.7–1.0 mg/L | 70% | 70% | >99% |
| PFAS | Compliant | 93% | 93% | 99% |
| Microplastics | Present | >99% | >99% | >99% |
| Lead | Trace (from pipes) | >95% | >95% | 100% |
| Heavy metals (Hg) | Trace | 95%+ | 95%+ | >99% |
| THMs | Present | >98% | >98% | >99% |
| TDS reduction | ~300–500 mg/L | — | — | 85% |
| Best for Perth | — | Best value | Taste + minerals | Hard water + TDS |
Perth's water is safe. Filtered, it's better.
Whether it's chlorine taste, hard water scale, fluoride preference, or PFAS concerns — find the right filter for your home.
Compare our filters → View lab results →We've tested and reviewed tap water across every Australian state and territory capital. See how your city compares.