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 2024–25 report.
Updated with Water Corporation 2024-25 data.
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Covers: North Dandalup, Pinjarra North
These figures are about taste, scale and appliance life — not safety. Is Perth tap water safe to drink? →
North Dandalup supply zone
Soft water
42mg/L total hardness (range 39–45)
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 reduces chlorine.
Other figures worth knowing
Chlorine by-products (THMs)0.026mg/L
pH7.81
Dissolved solids140mg/L
Sodium26mg/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 10% 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 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 — North Dandalup
Scale & hardness
Total hardness4239–45 mg/L as CaCO3
Total dissolved solids140130–149 mg/L
Alkalinity3529–41 mg/L as CaCO3
Silica1.20.8–1.6 mg/L
General chemistry
pH7.817.72–7.89 pH units
Sodium2621–30 mg/L
Chloride4840–55 mg/L
Sulphate41–6 mg/L
Aesthetic (taste, colour, staining)
Iron0.0380.015–0.06 mg/L
Manganese0.0020.002–0.003 mg/L
Aluminium0.0220.014–0.03 mg/L
True colour11–1 HU
Turbidity0.10.1–0.2 NTU
Health-related
Fluoride0.450.2–0.7 mg/L
Trihalomethanes (THMs)0.0260.003–0.054 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 North Dandalup 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. North Dandalup met all health-related safety requirements in 2024–25. See all Perth suburbs →