Perth Water Quality · Hills Direct
Water quality in Hills Direct
Your local water hardness and the full breakdown of 16 parameters, sourced from Water Corporation's 2023–24 report.
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Hills Direct supply zone
Soft water
46mg/L total hardness (range 38–55)
Water in Hills Direct is naturally soft. You likely don’t need softening — scale build-up should be minimal. A sediment and carbon filter still improves taste and removes chlorine.
Other figures worth knowing
Chlorine by-products (THMs)0.032mg/L
pH7.46
Dissolved solids183mg/L
Sodium40mg/L
Perth's water is disinfected with free chlorine at roughly 0.4–1.0 mg/L network-wide. The figure above is trihalomethanes (THMs) — by-products of chlorination that a catalytic carbon filter reduces. In Hills Direct they run at about 13% of the safety guideline.
What this means for your home
Water in Hills Direct is naturally soft. You likely don’t need softening — scale build-up should be minimal. A sediment and carbon filter still improves taste and removes chlorine.
✓Our honest take: You probably don’t need a softener. A 3-stage filter still helps with chlorine taste and sediment.
Full water quality breakdown — Hills Direct
Scale & hardness
Total hardness4638–55 mg/L as CaCO3
Total dissolved solids183142–219 mg/L
Alkalinity3125–44 mg/L as CaCO3
Silica1.71.6–1.9 mg/L
General chemistry
pH7.467.31–7.7 pH units
Sodium4031–49 mg/L
Chloride7555–90 mg/L
Sulphate75–9 mg/L
Aesthetic (taste, colour, staining)
Iron0.040.025–0.06 mg/L
Manganese0.0040.002–0.008 mg/L
Aluminium0.0120.01–0.016 mg/L
True colour11–1 HU
Turbidity0.30.1–0.4 NTU
Health-related
Fluoride0.810.7–0.85 mg/L
Trihalomethanes (THMs)0.0320.021–0.051 mg/L
Suburbs in the Hills Direct supply area: Bickley, Canning Vale, Gosnells, Hills Direct, Huntingdale, Kenwick, Maddington, Orange Grove, Southern River, Thornlie. Water Corporation reports quality by supply locality rather than individual suburb, so these suburbs share the Hills Direct figures above. Your exact property may vary slightly.
Check a different suburb
Source: Water Corporation Drinking Water Quality Annual Report 2023–24, Perth Region (aesthetic & health tables). Figures are locality means with min–max range. Verified June 2026. Hills Direct met all health-related safety requirements in 2023–24. See all Perth suburbs →
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