Perth Water Quality · Mirrabooka
Water quality in Mirrabooka
Your local water hardness and the full breakdown of 16 parameters, sourced from Water Corporation's 2023–24 report.
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Mirrabooka supply zone
Hard water
128mg/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)0.116mg/L
pH7.04
Dissolved solids495mg/L
Sodium109mg/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 46% 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 hardness128120–130 mg/L as CaCO3
Total dissolved solids495463–527 mg/L
Alkalinity5146–58 mg/L as CaCO3
Silica13.513–14 mg/L
General chemistry
pH7.046.63–7.24 pH units
Sodium10991–125 mg/L
Chloride191175–210 mg/L
Sulphate6454–68 mg/L
Aesthetic (taste, colour, staining)
Iron0.020.015–0.03 mg/L
Manganese0.0110.003–0.025 mg/L
Aluminium0.0150.01–0.02 mg/L
True colour11–1 HU
Turbidity0.20.1–0.3 NTU
Health-related
Fluoride0.780.5–0.85 mg/L
Nitrate1.31.3–1.8 mg/L
Trihalomethanes (THMs)0.1160.086–0.14 mg/L
Suburbs in the Mirrabooka supply area: Balga, Dianella, Girrawheen, Koondoola, Mirrabooka, Nollamara, Westminster. Water Corporation reports quality by supply locality rather than individual suburb, so these suburbs share the Mirrabooka 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. Mirrabooka met all health-related safety requirements in 2023–24. See all Perth suburbs →
Complete Home Filtration and CHF are trademarks used by Environmental Water Solutions Pty Ltd. ProperWater is not affiliated with, endorsed by, or sponsored by Complete Home Filtration or Environmental Water Solutions Pty Ltd. Model references including CHF-6000 and CHF-6200 are used solely to indicate product compatibility — PW Series replacement filters are independently designed for compatibility with standard 15" × 4.5" filter housings. All comparative pricing based on Complete Home Filtration's publicly published rates as of 2025.