Water hardness & quality in Merriwa, WA
6030 · Perth Region · Reporting period 2023-2024
Merriwa 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 its nearest monitored supply point, Neerabup, about 2 km away.
Water hardness
Very hardLikely190mg/L
Heavy scale on fixtures and appliances, and harder on hot water systems. Softeners and filters are common.
Estimated from Neerabup (190 mg/L, 2 km).
ADWG aesthetic guideline: 200 mg/L. Hardness affects scale and taste, not safety.
Compare water hardness across WA →Nearest monitored supply · 2 km from Merriwa
Neerabup
Its water is much closer to neutral pH, though it runs much harder and much cloudier, versus the Perth Region.
Purity
By-products & nitrate
About average for the Perth Region
Clarity
Turbidity, colour, metals
Cloudier than 93% of Perth Region supplies
Taste
Sodium, chloride, TDS
About average for the Perth Region
Hardness
Calcium & magnesium
Harder than 95% of Perth Region supplies
pH balance
How close to neutral (7.0)
More neutral than 85% of Perth Region supplies
Other monitored supplies near Merriwa
Water quality in suburbs near Merriwa
Common questions
Is the tap water in Merriwa tested?
Merriwa isn't sampled as an individual locality. Its water is supplied through the Water Corporation network; the closest monitored supply point is Neerabup, about 2 km away.
How hard is the water in Merriwa?
Merriwa isn't sampled directly. Its nearest monitored supply, Neerabup (about 2 km away), averages 190 mg/L of hardness — very hard. Heavy scale on fixtures and appliances, and harder on hot water systems. Softeners and filters are common.
Is the tap water in Merriwa safe to drink?
Merriwa isn't tested on its own, but its nearest monitored supply, Neerabup, met every NHMRC Australian Drinking Water Guidelines health limit with published data in 2023-2024.
How to read this
Merriwa 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).