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 2024–25 report.
Updated with Water Corporation 2024-25 data.
← All Perth suburbs
Covers: Beckenham, Bickley, Canning Mills, Canning Vale, Cannington, East Cannington, Ferndale, Gosnells, Hills Direct, Huntingdale, Kenwick, Langford, Lynwood, Maddington, Martin, Orange Grove, Parkwood, Queens Park, Southern River, Thornlie, Wilson
These figures are about taste, scale and appliance life — not safety. Is Perth tap water safe to drink? →
Hills Direct supply zone
Soft water
48mg/L total hardness (range 44–53)
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 reduces chlorine.
Other figures worth knowing
Chlorine by-products (THMs)0.031mg/L
pH7.61
Dissolved solids187mg/L
Sodium39mg/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 12% 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 reduces 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 hardness4844–53 mg/L as CaCO3
Total dissolved solids187150–219 mg/L
Alkalinity3932–52 mg/L as CaCO3
Silica1.81–2.9 mg/L
General chemistry
pH7.617.4–7.76 pH units
Sodium3930–51 mg/L
Chloride7055–95 mg/L
Sulphate74–10 mg/L
Aesthetic (taste, colour, staining)
Iron0.0330.015–0.045 mg/L
Manganese0.0040.002–0.008 mg/L
Aluminium0.010.008–0.016 mg/L
True colour11–1 HU
Turbidity0.20.1–0.4 NTU
Health-related
Fluoride0.820.7–0.9 mg/L
Trihalomethanes (THMs)0.0310.02–0.051 mg/L
About this supply area: Water Corporation reports quality by supply locality rather than individual suburb, so the suburbs listed at the top of this page all share the Hills Direct figures. Your exact property may vary slightly. Water Corporation doesn’t publish supply boundaries street-by-street, so matching suburbs to localities involves some interpretation — homes near a boundary may actually be served by a neighbouring locality, and figures there can differ slightly.
Source: Water Corporation Drinking Water Quality Annual Report 2024–25, Perth Region (aesthetic & health tables). Figures are locality means with min–max range. Verified July 2026. Hills Direct met all health-related safety requirements in 2024–25. See all Perth suburbs →