Hillside Water Hardness & Quality Report (2026)

Hillside's drinking water is supplied by Western Water, drawing from Melbourne Water's metropolitan reservoir system and Yarra Ranges catchment transfers for the Melton LGA outer western Melbourne growth corridor in Victoria. Water hardness in Hillside is measured at 5.5 mg/L — classified as extremely soft — among the most mineral-free of any suburban supply in Victoria, essentially pure water far below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Hillside — one of the fastest-growing outer western Melbourne residential communities in the Melton LGA — receives an extraordinary supply comparable in purity to the Barwon Water Torquay supply (6 mg/L), confirming the remarkable near-zero mineral character of the Yarra Ranges reservoir supply delivered to this outer growth corridor.

Hillside's exceptional purity reflects near-direct delivery of Devonian granite Yarra Ranges catchment supply through Western Water's outer western Melbourne distribution infrastructure. The Yarra Ranges reservoir system — primarily the Thomson Reservoir and Upper Yarra Reservoir — collects rainfall from pristine Devonian granite and rhyodacite terrain contributing essentially no dissolved minerals. The extraordinary TDS of 8.8 mg/L at Hillside confirms that Western Water's outer western Melton supply infrastructure delivers Yarra Ranges reservoir water to this growth corridor with virtually zero pipeline mineral pick-up, producing one of the softest urban supplies in Australia.

Hillside residents experience absolutely no limescale — taps, glass shower screens, and kettles remain permanently scale-free. Hot water systems maintain peak efficiency indefinitely with no scale concerns. At 5.5 mg/L, a mineralising filter cartridge is popular in this outer growth community to add trace minerals and improve taste. Western Water provides water quality information at westernwater.com.au, with all ADWG health standards consistently met. The very low lead reading (0.001 mg/L) confirms excellent, clean supply for all Hillside's rapidly growing residential estates.