Perth Water Quality · South Perth/Kewdale
Water quality in South Perth/Kewdale
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.
← All Perth suburbs
Covers: Ascot, Belmont, Bentley, Burswood, Carlisle, Cloverdale, Como, East Victoria Park, Karawara, Kensington, Kewdale, Lathlain, Manning, Perth Airport, Redcliffe, Rivervale, Salter Point, South Perth, St James, Victoria Park, Waterford, Welshpool
These figures are about taste, scale and appliance life — not safety. Is Perth tap water safe to drink? →
South Perth/Kewdale supply zone
Moderately hard
94mg/L total hardness (range 80–110)
Water in South Perth/Kewdale 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)0.118mg/L
pH7.85
Dissolved solids477mg/L
Sodium108mg/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 South Perth/Kewdale they run at about 47% of the safety guideline.
What this means for your home
Water in South Perth/Kewdale 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 — South Perth/Kewdale
Scale & hardness
Total hardness9480–110 mg/L as CaCO3
Total dissolved solids477416–548 mg/L
Alkalinity10790–130 mg/L as CaCO3
Silica14.513–17 mg/L
General chemistry
pH7.857.82–7.92 pH units
Sodium10895–120 mg/L
Chloride160145–175 mg/L
Sulphate2320–25 mg/L
Aesthetic (taste, colour, staining)
Iron0.020.015–0.025 mg/L
Manganese0.0030.002–0.005 mg/L
Aluminium0.0080.008–0.01 mg/L
True colour11–1 HU
Turbidity0.10.1–0.2 NTU
Health-related
Fluoride0.840.75–0.9 mg/L
Nitrate1.30.9–1.8 mg/L
Trihalomethanes (THMs)0.1180.073–0.16 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 South Perth/Kewdale 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. South Perth/Kewdale met all health-related safety requirements in 2024–25. See all Perth suburbs →