Sydney vs Perth
Water hardness comparison — how the two cities differ and what it means for your home.
HarderFull Perth data →
Perth
australia
202mg/L
Very Hard Water
14.14°e
Very Hard
Base Unit (CaCO3): 202 mg/LLocal Unit
Side-by-Side Impact
| Impact Area | Sydney | Perth |
|---|---|---|
| Limescale buildup | Minimal | Rapid — visible within weeks |
| Boiler/heating risk | Low risk | Annual descaling required |
| Dishwasher salt setting | Low setting (1–2) | Max salt setting (5–7) |
| Skin & hair impact | Low risk | High eczema/dry skin risk |
| Detergent usage | Standard dose | +30–40% more detergent |
Key Findings
Hardness Difference: 151 mg/L
Perth is significantly harder than Sydney — a difference that has major household implications. Appliances, boiler warranties, and detergent costs will differ substantially.
Moving from Sydney to Perth?
If you're relocating from Sydney to Perth, expect visible limescale on taps and shower heads within weeks. You'll need to recalibrate your dishwasher's salt setting, increase kettle descaling frequency, and check your boiler warranty requirements. A shower filter and under-sink scale inhibitor are worth considering immediately.