Wembley Water Hardness & Quality Report (2026)

Wembley's drinking water is supplied by the Water Corporation via the Integrated Water Supply Scheme (IWSS), with a proportionally high desalinated supply fraction for the Town of Cambridge LGA inner western Perth distribution in Western Australia. Water hardness in Wembley is measured at 117.5 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Wembley — an established inner western Perth suburb in the Town of Cambridge LGA, known for the Wembley Downs residential estates, the Wembley Sports Park and Alfresco recreational precinct, the proximity to City Beach, the Cambridge Street shopping village, and the leafy residential character of this inner western Perth LGA adjacent to Subiaco — receives notably soft supply by Perth metropolitan standards, reflecting a higher desalinated supply proportion in the inner western Cambridge distribution.

Wembley's comparatively soft supply reflects a proportionally high Kwinana and Binningup Seawater Desalination Plant fraction in the inner western Town of Cambridge IWSS distribution, significantly moderating the hard Tamala Limestone groundwater character of the Gnangara Mound system. The desalinated water contributes near-zero hardness, blending with groundwater to produce moderately soft supply at 117.5 mg/L and TDS 266.5 mg/L — substantially softer than inner Perth sub-zones with a higher groundwater fraction (Yokine 237.5 mg/L, Nollamara 211 mg/L, Duncraig 232 mg/L).

Wembley residents can expect moderate limescale on taps and in kettles — descaling every two to three months is typically adequate. Hot water systems benefit from periodic inspection. Solar hot water systems in WA's climate benefit from annual servicing. Under WA water restrictions, garden irrigation is limited. The very low lead reading (0.001 mg/L) is excellent. The Water Corporation provides water quality information at watercorporation.com.au, with all ADWG health standards met. Wembley's City Beach coastal community and the Town of Cambridge residential precinct benefit from this comparatively soft supply.