Seville Grove Water Hardness & Quality Report (2026)

Seville Grove's drinking water is supplied by the Water Corporation via the Integrated Water Supply Scheme (IWSS), incorporating Gnangara Mound and Tamala Limestone groundwater proportions for the City of Armadale LGA outer south-eastern Perth distribution in Western Australia. Water hardness in Seville Grove is measured at 204.5 mg/L — classified as hard, marginally exceeding the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Seville Grove — a residential suburb in the City of Armadale LGA adjacent to Armadale and Camillo in outer south-eastern Perth, known for the Seville Grove residential community on the Armadale Growth Corridor, the nearby Armadale town centre and Heritage Rose Garden, and the outer south-eastern Perth community on the Tonkin Highway corridor connecting Armadale to the Kwinana Freeway — receives hard supply at the outer south-eastern Armadale Perth IWSS distribution sub-zone.

Seville Grove's hard supply reflects a moderate-to-high Tamala Limestone groundwater fraction in the outer south-eastern Armadale Perth IWSS distribution blend. The Gnangara Mound groundwater percolates through the Superficial Aquifer and Tamala Limestone — the porous Eocene carbonate formation of the Swan Coastal Plain — accumulating dissolved calcium carbonate and associated minerals. At 204.5 mg/L and TDS 562.7 mg/L, Seville Grove's supply marginally exceeds the ADWG aesthetic guideline, somewhat softer than the adjacent Kelmscott sub-zone (237.5 mg/L) in the same City of Armadale LGA — reflecting a slightly different IWSS distribution routing and groundwater fraction at the Seville Grove sub-zone.

Seville Grove residents face moderate-to-significant limescale on taps and in kettles — descaling every two to four weeks is typical. Hot water systems benefit from annual inspection. Solar hot water in WA's climate benefits from annual servicing. Under WA water restrictions, garden watering is limited to two days per week. The elevated lead reading (0.004 mg/L) warrants briefly running the cold tap before use. The Water Corporation provides water quality information at watercorporation.com.au, with all ADWG health standards met. Seville Grove's outer south-eastern Perth community benefits from supply meeting all ADWG standards.