Water hardness & quality in The Plains, WA
6237 · South West Region · Reporting period 2023-2024
The Plains 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 — Boyanup and Capel.
Water hardness
Moderately hardLikely105mg/L
Nearby supplies: 47–105 mg/L
Some scale builds up over time on kettles and shower heads. Most homes don't need a softener.
Estimated from Boyanup (105 mg/L, 8 km) and Capel (47 mg/L, 8 km).
ADWG aesthetic guideline: 200 mg/L. Hardness affects scale and taste, not safety.
Compare water hardness across WA →Nearest monitored supply · 8 km from The Plains
Boyanup
Its water is clearer and closer to neutral pH, though it runs harder and saltier, versus the South West Region.
Clarity
Turbidity, colour, metals
Clearer than 79% of South West Region supplies
Taste
Sodium, chloride, TDS
Saltier than 68% of South West Region supplies
Hardness
Calcium & magnesium
Harder than 76% of South West Region supplies
pH balance
How close to neutral (7.0)
More neutral than 76% of South West Region supplies
Nearest monitored supply · 8 km from The Plains
Capel
Its water is clearer, though it runs much further from neutral pH, versus the South West Region.
Clarity
Turbidity, colour, metals
Clearer than 65% of South West Region supplies
Taste
Sodium, chloride, TDS
About average for the South West Region
Hardness
Calcium & magnesium
About average for the South West Region
pH balance
How close to neutral (7.0)
Further from neutral than 97% of South West Region supplies
Other monitored supplies near The Plains
Water quality in suburbs near The Plains
Common questions
Is the tap water in The Plains tested?
The Plains isn't sampled as an individual locality. Its water is supplied through the Water Corporation network; the closest monitored supply point is Boyanup, about 8 km away.
How hard is the water in The Plains?
The Plains isn't sampled directly. Its nearest monitored supply, Boyanup (about 8 km away), averages 105 mg/L of hardness — moderately hard. Other supplies within a few kilometres read 47–105 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 The Plains safe to drink?
The Plains isn't tested on its own, but its nearest monitored supply, Boyanup, met every NHMRC Australian Drinking Water Guidelines health limit with published data in 2023-2024.
How to read this
The Plains 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).