Perth Water Quality · Greenmount
Water quality in Greenmount
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: Ashfield, Bassendean, Bellevue, Boya, Bushmead, Eden Hill, Greenmount, Guildford, Hazelmere, Helena Valley, Jane Brook, Kiara, Koongamia, Lockridge, Middle Swan, Midland, Midvale, Red Hill, South Guildford, Stratton, Swan View, Viveash, Woodbridge
These figures are about taste, scale and appliance life — not safety. Is Perth tap water safe to drink? →
Greenmount supply zone
Moderately hard
95mg/L total hardness (range 86–100)
Water in Greenmount 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)0.114mg/L
pH8.23
Dissolved solids497mg/L
Sodium114mg/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 Greenmount they run at about 46% of the safety guideline.
What this means for your home
Water in Greenmount 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 — Greenmount
Scale & hardness
Total hardness9586–100 mg/L as CaCO3
Total dissolved solids497440–564 mg/L
Alkalinity10595–120 mg/L as CaCO3
Silica13.59.3–17 mg/L
General chemistry
pH8.238.18–8.35 pH units
Sodium114100–130 mg/L
Chloride172150–195 mg/L
Sulphate2320–26 mg/L
Aesthetic (taste, colour, staining)
Iron0.0110.008–0.015 mg/L
Manganese0.0020.002–0.003 mg/L
Aluminium0.0080.008–0.008 mg/L
True colour11–1 HU
Turbidity0.10.1–0.1 NTU
Health-related
Fluoride0.840.75–0.9 mg/L
Nitrate0.90.9–1.3 mg/L
Trihalomethanes (THMs)0.1140.082–0.15 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 Greenmount 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. Greenmount met all health-related safety requirements in 2024–25. See all Perth suburbs →