Perth Water Quality · Mundaring
Water quality in Mundaring
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: Bailup, Beechina, Chidlow, Gidgegannup, Gorrie, Mount Helena, Mundaring, Sawyers Valley, The Lakes, Wooroloo
These figures are about taste, scale and appliance life — not safety. Is Perth tap water safe to drink? →
Mundaring supply zone
Moderately hard
98mg/L total hardness (range 97–99)
Water in Mundaring is moderately hard. You may notice some scale over time on kettles and shower screens, but it’s manageable. Carbon filtration improves taste; softening is optional.
Other figures worth knowing
Chlorine by-products (THMs)0.021mg/L
pH8.55
Dissolved solids470mg/L
Sodium113mg/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 Mundaring they run at about 8% of the safety guideline.
What this means for your home
Water in Mundaring is moderately hard. You may notice some scale over time on kettles and shower screens, but it’s manageable. Carbon filtration improves taste; softening is optional.
✓Our honest take: A carbon filter improves taste and chlorine; scale prevention is a nice-to-have, not essential.
Full water quality breakdown — Mundaring
Scale & hardness
Total hardness9897–99 mg/L as CaCO3
Total dissolved solids470469–470 mg/L
Alkalinity6765–69 mg/L as CaCO3
Silica5.65.4–5.7 mg/L
General chemistry
pH8.558.5–8.59 pH units
Sodium113110–115 mg/L
Chloride200200–200 mg/L
Sulphate3029–31 mg/L
Aesthetic (taste, colour, staining)
Iron0.0060.006–0.006 mg/L
Manganese0.0020.002–0.002 mg/L
Aluminium0.0190.008–0.03 mg/L
True colour11–1 HU
Turbidity0.10.1–0.2 NTU
Health-related
Fluoride0.830.6–0.9 mg/L
Nitrate0.40.4–0.9 mg/L
Trihalomethanes (THMs)0.0210.015–0.028 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 Mundaring 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. Mundaring met all health-related safety requirements in 2024–25. See all Perth suburbs →