Alexandra Hills Water Hardness & Quality Report (2026)

Seqwater provides the bulk water for the Redland City Council area, including Alexandra Hills, Queensland, Australia. This supply originates from the Alexandra Hills Reservoirs, which store treated water before it's distributed by local retailers like Urban Utilities and Unitywater. The main sources are surface waters drawn from the SEQ Water Grid, including Wivenhoe Dam on the Brisbane River and North Pine Dam. Treated water then moves to local reservoirs for final storage. Key treatment facilities, such as Mt Crosby and Bundamba, handle processes like coagulation, filtration, disinfection, and fluoridation before the water reaches its final storage.

The catchment area covers the Stanley River and Brisbane River watersheds. Geologically, the region is dominated by sedimentary rocks belonging to the Clarence-Moreton Basin. These include sandstone, siltstone, and interbedded volcanics dating from the Triassic to Cretaceous periods. Weathering of basalt and rhyolite intrusives also contributes to the landscape. As this runoff flows into the reservoirs, it picks up natural minerals from these formations and basin sediments, resulting in a hard water supply without the use of groundwater.

When water is this hard, you'll likely notice scale buildup in appliances like kettles, dishwashers, and washing machines. This accumulation can reduce their efficiency and shorten their lifespan. Hot water systems and showerheads are particularly susceptible, leading to increased energy consumption and more frequent cleaning. To manage these effects, homeowners can regularly descale with vinegar, install scale filters, or use detergents specifically formulated for hard water. Given the moderate hardness level, a whole-house water softener isn't usually necessary for drinking water, as the minerals are considered safe and potentially beneficial.