Perth Water Quality · Foothills
Water quality in Foothills
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: Carmel, Forrestfield, Gooseberry Hill, Hacketts Gully, High Wycombe, Kalamunda, Lesmurdie, Maida Vale, Paulls Valley, Pickering Brook, Piesse Brook, Reservoir, Walliston, Wattle Grove
These figures are about taste, scale and appliance life — not safety. Is Perth tap water safe to drink? →
Foothills supply zone
Moderately hard
75mg/L total hardness (range 71–78)
Water in Foothills 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)0.069mg/L
pH7.98
Dissolved solids371mg/L
Sodium90mg/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 Foothills they run at about 28% of the safety guideline.
What this means for your home
Water in Foothills 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 — Foothills
Scale & hardness
Total hardness7571–78 mg/L as CaCO3
Total dissolved solids371325–416 mg/L
Alkalinity6362–64 mg/L as CaCO3
Silica4.23.5–4.8 mg/L
General chemistry
pH7.987.95–8 pH units
Sodium9074–105 mg/L
Chloride153130–175 mg/L
Sulphate1714–19 mg/L
Aesthetic (taste, colour, staining)
Iron0.0230.02–0.025 mg/L
Manganese0.0040.003–0.005 mg/L
Aluminium0.0160.016–0.016 mg/L
True colour11–1 HU
Turbidity0.20.1–0.3 NTU
Health-related
Fluoride0.820.7–0.9 mg/L
Trihalomethanes (THMs)0.0690.031–0.1 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 Foothills 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. Foothills met all health-related safety requirements in 2024–25. See all Perth suburbs →