Perth Water Quality · Greenmount/Darlington
Water quality in Greenmount/Darlington
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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These figures are about taste, scale and appliance life — not safety. Is Perth tap water safe to drink? →
Greenmount/Darlington supply zone
Moderately hard
77mg/L total hardness (range 69–85)
Water in Greenmount/Darlington 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)0.102mg/L
pH8.24
Dissolved solids388mg/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 Greenmount/Darlington they run at about 41% of the safety guideline.
What this means for your home
Water in Greenmount/Darlington 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/Darlington
Scale & hardness
Total hardness7769–85 mg/L as CaCO3
Total dissolved solids388349–426 mg/L
Alkalinity7266–77 mg/L as CaCO3
Silica5.95.6–6.1 mg/L
General chemistry
pH8.248.22–8.25 pH units
Sodium9283–100 mg/L
Chloride153135–170 mg/L
Sulphate1816–19 mg/L
Aesthetic (taste, colour, staining)
Iron0.020.02–0.02 mg/L
Manganese0.0030.003–0.003 mg/L
Aluminium0.010.008–0.012 mg/L
True colour11–1 HU
Turbidity0.10.1–0.2 NTU
Health-related
Fluoride0.830.75–0.9 mg/L
Nitrate0.40.4–0.4 mg/L
Trihalomethanes (THMs)0.1020.077–0.12 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/Darlington 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/Darlington met all health-related safety requirements in 2024–25. See all Perth suburbs →