Water hardness & quality in Thornlie, WA
6108 · Perth Region · Reporting period 2023-2024
Thornlie isn't sampled as its own locality. Its drinking water is supplied through the Water Corporation network, so the closest picture of what comes out of the tap is the two monitored supply points it sits between — Armadale & Kelmscott and South Perth & Kewdale.
Water hardness
Moderately hardLikely77mg/L
Nearby supplies: 77–97 mg/L
Some scale builds up over time on kettles and shower heads. Most homes don't need a softener.
Estimated from Armadale & Kelmscott (77 mg/L, 12 km) and South Perth & Kewdale (97 mg/L, 12 km).
ADWG aesthetic guideline: 200 mg/L. Hardness affects scale and taste, not safety.
Compare water hardness across WA →Nearest monitored supply · 12 km from Thornlie
Armadale & Kelmscott
Its water is softer than most of the Perth Region.
Purity
By-products & nitrate
About average for the Perth Region
Clarity
Turbidity, colour, metals
About average for the Perth Region
Taste
Sodium, chloride, TDS
About average for the Perth Region
Hardness
Calcium & magnesium
Softer than 67% of Perth Region supplies
pH balance
How close to neutral (7.0)
About average for the Perth Region
Nearest monitored supply · 12 km from Thornlie
South Perth & Kewdale
Its water runs saltier and harder than most of the Perth Region.
Purity
By-products & nitrate
About average for the Perth Region
Clarity
Turbidity, colour, metals
Cloudier than 67% of Perth Region supplies
Taste
Sodium, chloride, TDS
Saltier than 83% of Perth Region supplies
Hardness
Calcium & magnesium
Harder than 78% of Perth Region supplies
pH balance
How close to neutral (7.0)
About average for the Perth Region
Other monitored supplies near Thornlie
Water quality in suburbs near Thornlie
Common questions
Is the tap water in Thornlie tested?
Thornlie isn't sampled as an individual locality. Its water is supplied through the Water Corporation network; the closest monitored supply point is Armadale & Kelmscott, about 12 km away.
How hard is the water in Thornlie?
Thornlie isn't sampled directly. Its nearest monitored supply, Armadale & Kelmscott (about 12 km away), averages 77 mg/L of hardness — moderately hard. Other supplies within a few kilometres read 77–97 mg/L, so your street may differ. Some scale builds up over time on kettles and shower heads. Most homes don't need a softener.
Is the tap water in Thornlie safe to drink?
Thornlie isn't tested on its own, but its nearest monitored supply, Armadale & Kelmscott, met every NHMRC Australian Drinking Water Guidelines health limit with published data in 2023-2024.
How to read this
Thornlie doesn't have its own published sampling point. The supplies shown here are the closest monitored locations by distance — a useful proxy, but not a guarantee of the exact source feeding your street, since much of Perth draws on the blended Integrated Water Supply Scheme. For the authoritative picture, check with Water Corporation.
Readings come from the Water Corporation of WA Drinking Water Quality Annual Report 2023-2024, ranked within each supply's region. Suburb locations: GeoNames (CC BY 4.0).