Perth Water Quality · Mirrabooka
Water quality in Mirrabooka
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.
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Covers: Alexander Heights, Balga, Ballajura, Bayswater, Dianella, Embleton, Girrawheen, Koondoola, Malaga, Marangaroo, Mirrabooka, Morley, Nollamara, Noranda, Westminster
These figures are about taste, scale and appliance life — not safety. Is Perth tap water safe to drink? →
Mirrabooka supply zone
Hard water
124mg/L total hardness (range 120–130)
Water in Mirrabooka is hard. Expect limescale on appliances, shower screens and hot water systems over time. Scale prevention or softening makes a noticeable difference here.
Other figures worth knowing
Chlorine by-products (THMs)0.125mg/L
pH7.13
Dissolved solids517mg/L
Sodium112mg/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 Mirrabooka they run at about 50% of the safety guideline.
What this means for your home
Water in Mirrabooka is hard. Expect limescale on appliances, shower screens and hot water systems over time. Scale prevention or softening makes a noticeable difference here.
✓Our honest take: A scale-prevention or softening stage is worth it — it protects your appliances and hot water system.
Full water quality breakdown — Mirrabooka
Scale & hardness
Total hardness124120–130 mg/L as CaCO3
Total dissolved solids517483–539 mg/L
Alkalinity5838–98 mg/L as CaCO3
Silica15.414–17 mg/L
General chemistry
pH7.136.88–7.58 pH units
Sodium11295–120 mg/L
Chloride207170–220 mg/L
Sulphate5626–71 mg/L
Aesthetic (taste, colour, staining)
Iron0.0180.008–0.025 mg/L
Manganese0.0030.002–0.005 mg/L
Aluminium0.0080.008–0.02 mg/L
True colour11–1 HU
Turbidity0.10.1–0.2 NTU
Health-related
Fluoride0.820.7–0.9 mg/L
Nitrate1.81.3–2.6 mg/L
Trihalomethanes (THMs)0.1250.099–0.15 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 Mirrabooka 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. Mirrabooka met all health-related safety requirements in 2024–25. See all Perth suburbs →