Bentleigh East Water Hardness & Quality Report (2026)

Bentleigh East's drinking water is supplied by South East Water as water retailer, with bulk supply from Melbourne Water drawn from the Thomson Reservoir and Upper Yarra Reservoir catchments in the Yarra Ranges, Victoria. Water hardness in Bentleigh East is measured at 73.5 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Bentleigh East, in the Glen Eira LGA of inner south Melbourne, receives Melbourne Water's Yarra Ranges supply through the southern metropolitan distribution network, with slightly elevated hardness compared to the CBD reflecting the south Melbourne distribution pathway.

Bentleigh East's slightly elevated hardness relative to the Melbourne CBD (41.5 mg/L) reflects the characteristics of the southern distribution network. The supply originates from the same Devonian granite and rhyodacite Yarra Ranges catchments that produce Melbourne's soft base supply, but the southern distribution pipeline pathway from the main reservoirs to the inner south Melbourne suburbs picks up modest additional mineral content. The south Melbourne distribution zone typically produces slightly harder supply than the CBD or the eastern outer suburbs served by near-source reservoir connections.

Bentleigh East residents see occasional light limescale deposits on tap fittings and in kettles — descaling every two to three months is generally adequate. Hot water systems accumulate light scale over their service life. The elevated lead reading (0.003 mg/L) warrants briefly running the cold tap before use in older established homes in Bentleigh East's extensive post-war residential streets. South East Water provides water quality information at southeastwater.com.au, with all ADWG health standards consistently met throughout the Glen Eira supply zone.