Water hardness & quality in Guildford, WA
6055 · Perth Region · Reporting period 2023-2024
Guildford 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 — Greenmount and West Yokine.
Water hardness
Moderately hardLikely95mg/L
Nearby supplies: 95–114 mg/L
Some scale builds up over time on kettles and shower heads. Most homes don't need a softener.
Estimated from Greenmount (95 mg/L, 7 km) and West Yokine (114 mg/L, 10 km).
ADWG aesthetic guideline: 200 mg/L. Hardness affects scale and taste, not safety.
Compare water hardness across WA →Nearest monitored supply · 7 km from Guildford
Greenmount
Its water is clearer, though it runs much further from neutral pH and saltier, versus the Perth Region.
Purity
By-products & nitrate
Less pure than 70% of Perth Region supplies
Clarity
Turbidity, colour, metals
Clearer than 85% of Perth Region supplies
Taste
Sodium, chloride, TDS
Saltier than 73% of Perth Region supplies
Hardness
Calcium & magnesium
About average for the Perth Region
pH balance
How close to neutral (7.0)
Further from neutral than 89% of Perth Region supplies
Nearest monitored supply · 10 km from Guildford
West Yokine
Its water is much closer to neutral pH, though it runs much saltier and less pure, versus the Perth Region.
Purity
By-products & nitrate
Less pure than 73% of Perth Region supplies
Clarity
Turbidity, colour, metals
About average for the Perth Region
Taste
Sodium, chloride, TDS
Saltier than 88% of Perth Region supplies
Hardness
Calcium & magnesium
Harder than 70% of Perth Region supplies
pH balance
How close to neutral (7.0)
More neutral than 100% of Perth Region supplies
Other monitored supplies near Guildford
Water quality in suburbs near Guildford
Common questions
Is the tap water in Guildford tested?
Guildford isn't sampled as an individual locality. Its water is supplied through the Water Corporation network; the closest monitored supply point is Greenmount, about 7 km away.
How hard is the water in Guildford?
Guildford isn't sampled directly. Its nearest monitored supply, Greenmount (about 7 km away), averages 95 mg/L of hardness — moderately hard. Other supplies within a few kilometres read 95–114 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 Guildford safe to drink?
Guildford isn't tested on its own, but its nearest monitored supply, Greenmount, met every NHMRC Australian Drinking Water Guidelines health limit with published data in 2023-2024.
How to read this
Guildford 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).