Water hardness & quality in Perth, WA
6000 · Perth Region · Reporting period 2023-2024
Perth 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 — Mount Eliza and South Perth & Kewdale.
Water hardness
Moderately hardLikely69mg/L
Nearby supplies: 69–114 mg/L
Some scale builds up over time on kettles and shower heads. Most homes don't need a softener.
Estimated from Mount Eliza (69 mg/L, 3 km), South Perth & Kewdale (97 mg/L, 3 km), Mount Hawthorn (110 mg/L, 4 km) and West Yokine (114 mg/L, 5 km).
ADWG aesthetic guideline: 200 mg/L. Hardness affects scale and taste, not safety.
Compare water hardness across WA →Nearest monitored supply · 3 km from Perth
Mount Eliza
Its water runs saltier 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
Saltier than 67% of Perth Region supplies
Hardness
Calcium & magnesium
About average for the Perth Region
pH balance
How close to neutral (7.0)
About average for the Perth Region
Nearest monitored supply · 3 km from Perth
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 Perth
Water quality in suburbs near Perth
Common questions
Is the tap water in Perth tested?
Perth isn't sampled as an individual locality. Its water is supplied through the Water Corporation network; the closest monitored supply point is Mount Eliza, about 3 km away.
How hard is the water in Perth?
Perth isn't sampled directly. Its nearest monitored supply, Mount Eliza (about 3 km away), averages 69 mg/L of hardness — moderately hard. Other supplies within a few kilometres read 69–114 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 Perth safe to drink?
Perth isn't tested on its own, but its nearest monitored supply, Mount Eliza, met every NHMRC Australian Drinking Water Guidelines health limit with published data in 2023-2024.
How to read this
Perth 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).