Water hardness & quality in Rottnest Island, WA
6161 · Perth Region · Reporting period 2023-2024
Rottnest Island 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 — Buckland Hill and Bold Park.
Water hardness
Moderately hardLikely63mg/L
Nearby supplies: 62–63 mg/L
Some scale builds up over time on kettles and shower heads. Most homes don't need a softener.
Estimated from Buckland Hill (63 mg/L, 23 km) and Bold Park (62 mg/L, 25 km).
ADWG aesthetic guideline: 200 mg/L. Hardness affects scale and taste, not safety.
Compare water hardness across WA →Nearest monitored supply · 23 km from Rottnest Island
Buckland Hill
Its water is clearer and purer than most of the Perth Region.
Purity
By-products & nitrate
Purer than 69% of Perth Region supplies
Clarity
Turbidity, colour, metals
Clearer than 79% of Perth Region supplies
Taste
Sodium, chloride, TDS
About average for the Perth Region
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 · 25 km from Rottnest Island
Bold Park
Its water is softer and fresher 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
Fresher than 75% of Perth Region supplies
Hardness
Calcium & magnesium
Softer than 79% of Perth Region supplies
pH balance
How close to neutral (7.0)
More neutral than 70% of Perth Region supplies
Other monitored supplies near Rottnest Island
Water quality in suburbs near Rottnest Island
Common questions
Is the tap water in Rottnest Island tested?
Rottnest Island isn't sampled as an individual locality. Its water is supplied through the Water Corporation network; the closest monitored supply point is Buckland Hill, about 23 km away.
How hard is the water in Rottnest Island?
Rottnest Island isn't sampled directly. Its nearest monitored supply, Buckland Hill (about 23 km away), averages 63 mg/L of hardness — moderately hard. Other supplies within a few kilometres read 62–63 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 Rottnest Island safe to drink?
Rottnest Island isn't tested on its own, but its nearest monitored supply, Buckland Hill, met every NHMRC Australian Drinking Water Guidelines health limit with published data in 2023-2024.
How to read this
Rottnest Island 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).