Perth Water Quality · Armadale/Kelmscott
Water quality in Armadale/Kelmscott
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: Armadale, Ashendon, Bedfordale, Brookdale, Camillo, Champion Lakes, Doobarda, Forrestdale, Harrisdale, Haynes, Hilbert, Karragullen, Kelmscott, Mount Nasura, Mount Richon, Piara Waters, Roleystone, Seville Grove, Wungong
These figures are about taste, scale and appliance life — not safety. Is Perth tap water safe to drink? →
Armadale/Kelmscott supply zone
Moderately hard
75mg/L total hardness (range 73–77)
Water in Armadale/Kelmscott 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)0.071mg/L
pH7.72
Dissolved solids373mg/L
Sodium92mg/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 Armadale/Kelmscott they run at about 28% of the safety guideline.
What this means for your home
Water in Armadale/Kelmscott 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 — Armadale/Kelmscott
Scale & hardness
Total hardness7573–77 mg/L as CaCO3
Total dissolved solids373363–382 mg/L
Alkalinity5855–60 mg/L as CaCO3
Silica2.62.3–2.8 mg/L
General chemistry
pH7.727.71–7.72 pH units
Sodium9289–95 mg/L
Chloride155150–160 mg/L
Sulphate1818–18 mg/L
Aesthetic (taste, colour, staining)
Iron0.0330.03–0.035 mg/L
Manganese0.0040.002–0.008 mg/L
Aluminium0.010.01–0.01 mg/L
True colour11–1 HU
Turbidity0.20.1–0.2 NTU
Health-related
Fluoride0.830.65–0.9 mg/L
Trihalomethanes (THMs)0.0710.049–0.094 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 Armadale/Kelmscott 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. Armadale/Kelmscott met all health-related safety requirements in 2024–25. See all Perth suburbs →