Perth Water Quality · North Dandalup
Water quality in North Dandalup
Your local water hardness and the full breakdown of 16 parameters, sourced from Water Corporation's 2023–24 report.
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North Dandalup supply zone
Soft water
33mg/L total hardness (range 29–37)
Water in North Dandalup is naturally soft. You likely don’t need softening — scale build-up should be minimal. A sediment and carbon filter still improves taste and removes chlorine.
Other figures worth knowing
Chlorine by-products (THMs)0.033mg/L
pH6.96
Dissolved solids155mg/L
Sodium38mg/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 North Dandalup they run at about 13% of the safety guideline.
What this means for your home
Water in North Dandalup is naturally soft. You likely don’t need softening — scale build-up should be minimal. A sediment and carbon filter still improves taste and removes 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 — North Dandalup
Scale & hardness
Total hardness3329–37 mg/L as CaCO3
Total dissolved solids155148–162 mg/L
Alkalinity1211–13 mg/L as CaCO3
Silica1.81.6–2 mg/L
General chemistry
pH6.966.89–7.02 pH units
Sodium3836–39 mg/L
Chloride7365–80 mg/L
Sulphate98–10 mg/L
Aesthetic (taste, colour, staining)
Iron0.0480.045–0.05 mg/L
Manganese0.0030.002–0.005 mg/L
Aluminium0.0080.008–0.01 mg/L
True colour11–1 HU
Turbidity0.30.2–0.4 NTU
Health-related
Fluoride0.38?–0.75 mg/L
Trihalomethanes (THMs)0.0330.022–0.053 mg/L
Suburbs in the North Dandalup supply area: North Dandalup, Pinjarra North. Water Corporation reports quality by supply locality rather than individual suburb, so these suburbs share the North Dandalup 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. North Dandalup met all health-related safety requirements in 2023–24. See all Perth suburbs →
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