Templestowe Water Hardness & Quality Report (2026)

Templestowe's drinking water is supplied by Yarra Valley Water as water retailer, with bulk supply from Melbourne Water drawn from the Maroondah Reservoir and Upper Yarra Reservoir catchments in the Yarra Ranges, Victoria. Water hardness in Templestowe is measured at 47 mg/L — classified as soft — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Templestowe, in the Manningham LGA — a leafy outer eastern Melbourne suburb of prestige homes in the Yarra River valley, adjacent to the Ruffey Lake Park and Templestowe Lower historic village precinct — benefits from a soft, predominantly Yarra Ranges reservoir supply consistent with the character of the Manningham outer east distribution corridor along the Yarra valley.

Templestowe's soft supply reflects a predominantly direct Maroondah Reservoir and Upper Yarra supply pathway at the Manningham eastern distribution node, with minimal Winneke Water Treatment Plant contribution. The Maroondah and Upper Yarra storages drain across Devonian granite and rhyodacite — highly resistant igneous formations contributing negligible dissolved minerals. The Templestowe Manningham distribution sub-zone at 47 mg/L and TDS 89 mg/L receives a predominantly reservoir-dominated supply blend, consistent with the soft supply character of the outer eastern Melbourne Yarra valley corridor.

Templestowe residents enjoy very low limescale accumulation on taps, in kettles, and around shower fittings — descaling is an occasional rather than regular task. Hot water systems accumulate minimal scale. The low lead reading (0.002 mg/L) confirms excellent supply quality. Yarra Valley Water provides water quality information at yvw.com.au, with all ADWG health standards consistently met. The soft, clean supply is a practical benefit for Templestowe's valued outer eastern Melbourne residential community along the Yarra River valley parkland corridor.