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Perth Water Quality · Mt. Hawthorn

Water quality in Mt. Hawthorn

Your local water hardness and the full breakdown of 16 parameters, sourced from Water Corporation's 2023–24 report.

← All Perth suburbs
Mt. Hawthorn supply zone
Hard water
110mg/L total hardness (range 100–120)
Water in Mt. Hawthorn is hard. Expect limescale on appliances, shower screens and hot water systems over time. Scale prevention or softening makes a noticeable difference here.
Other figures worth knowing
Chlorine by-products (THMs)0.103mg/L
pH7.9
Dissolved solids564mg/L
Sodium126mg/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 Mt. Hawthorn they run at about 41% of the safety guideline.

What this means for your home

Water in Mt. Hawthorn is hard. Expect limescale on appliances, shower screens and hot water systems over time. Scale prevention or softening makes a noticeable difference here.

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Our honest take: A scale-prevention or softening stage is worth it — it protects your appliances and hot water system.
See your filtration options → Learn about hard water
Full water quality breakdown — Mt. Hawthorn
Scale & hardness
Total hardness110100–120 mg/L as CaCO3
Total dissolved solids564549–591 mg/L
Alkalinity123110–130 mg/L as CaCO3
Silica16.515–17 mg/L
General chemistry
pH7.97.74–8.05 pH units
Sodium126120–140 mg/L
Chloride191185–205 mg/L
Sulphate2924–33 mg/L
Aesthetic (taste, colour, staining)
Iron0.0330.02–0.045 mg/L
Manganese0.0060.003–0.008 mg/L
Aluminium0.0080.008–0.008 mg/L
True colour11–1 HU
Turbidity0.10.1–0.3 NTU
Health-related
Fluoride0.820.75–0.9 mg/L
Nitrate1.80.9–1.8 mg/L
Trihalomethanes (THMs)0.1030.076–0.12 mg/L
Suburbs in the Mt. Hawthorn supply area: Coolbinia, East Perth, Highgate, Leederville, Menora, Mount Hawthorn, Mount Lawley, Mt Hawthorn, Mt Lawley, North Perth, Northbridge, Perth, West Perth. Water Corporation reports quality by supply locality rather than individual suburb, so these suburbs share the Mt. Hawthorn 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. Mt. Hawthorn met all health-related safety requirements in 2023–24. See all Perth suburbs →

Complete Home Filtration and CHF are trademarks used by Environmental Water Solutions Pty Ltd. ProperWater is not affiliated with, endorsed by, or sponsored by Complete Home Filtration or Environmental Water Solutions Pty Ltd. Model references including CHF-6000 and CHF-6200 are used solely to indicate product compatibility — PW Series replacement filters are independently designed for compatibility with standard 15" × 4.5" filter housings. All comparative pricing based on Complete Home Filtration's publicly published rates as of 2025.