Seville Grove Water Hardness & Quality Report (2026)

Seville Grove residents in the City of Armadale, part of Perth's metropolitan area in Western Australia, receive their water from Water Corporation. The supply primarily comes from groundwater sources drawn from the Gnangara and Jandakot mounds. While desalination plants like Perth Seawater Desalination Plant and Kwinana contribute, the Integrated Water Supply Scheme channels this water, treated at facilities like the Armadale Water Treatment Plant, to over two million Perth residents. Rainfall replenishes the Gnangara and Jandakot mounds, which feed key aquifers such as the superficial unconfined aquifer in Tamala Limestone and confined aquifers within the Leederville Formation.

The water's journey through the Perth Basin's geological layers is key to its character. Groundwater percolates through Quaternary and Tertiary limestone and sand formations. These strata, particularly the karstic limestone and basaltic influences within the Perth Basin's sedimentary sequence, readily dissolve calcium carbonate and magnesium-rich minerals. This natural process, influenced by the basin's geological history spanning from the Permian to Recent periods, leads to the characteristic hardness observed in Seville Grove's water supply.

This very hard water can lead to significant limescale buildup, affecting appliances like kettles, hot water systems, dishwashers, and washing machines, ultimately reducing their efficiency and lifespan. Scale accumulation in boilers and pipes can also increase energy costs by as much as 20-30%. Homeowners can mitigate these issues through regular vinegar descaling, installing scale filters on faucets and showerheads, and performing biannual flushing of hot water systems. To prevent appliance damage and improve soap efficiency, installing a whole-house water softener is strongly recommended. The Water Corporation confirms full compliance with the Australian Drinking Water Guidelines, with recent reports showing no lead or copper exceedances and no specific PFAS detections above guidelines.