Perth Water Quality · Mandurah
Water quality in Mandurah
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: Coodanup, Dudley Park, Erskine, Falcon, Greenfields, Halls Head, Lakelands, Madora Bay, Mandurah, Meadow Springs, San Remo, Silver Sands, Wannanup
These figures are about taste, scale and appliance life — not safety. Is Perth tap water safe to drink? →
Mandurah supply zone
Soft water
50mg/L total hardness (range 46–52)
Water in Mandurah 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)0.017mg/L
pH8.39
Dissolved solids143mg/L
Sodium22mg/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 Mandurah they run at about 7% of the safety guideline.
What this means for your home
Water in Mandurah 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 — Mandurah
Scale & hardness
Total hardness5046–52 mg/L as CaCO3
Total dissolved solids143131–150 mg/L
Alkalinity4939–62 mg/L as CaCO3
Silica1.30.8–2.2 mg/L
General chemistry
pH8.398.17–8.5 pH units
Sodium2220–26 mg/L
Chloride3832–50 mg/L
Sulphate21–4 mg/L
Aesthetic (taste, colour, staining)
Iron0.0080.004–0.015 mg/L
Manganese0.0020.002–0.003 mg/L
Aluminium0.0170.016–0.018 mg/L
True colour11–1 HU
Turbidity0.10.1–0.2 NTU
Health-related
Fluoride0.820.7–0.9 mg/L
Trihalomethanes (THMs)0.017?–0.078 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 Mandurah 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. Mandurah met all health-related safety requirements in 2024–25. See all Perth suburbs →