Maribyrnong Water Hardness & Quality Report (2026)

Maribyrnong's drinking water is supplied by City West Water as water retailer, with bulk supply from Melbourne Water incorporating a moderate Winneke Water Treatment Plant contribution for the City of Maribyrnong LGA inner western Melbourne distribution in Victoria. Water hardness in Maribyrnong is measured at 103.5 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Maribyrnong, in the City of Maribyrnong LGA — an inner western Melbourne suburb undergoing significant urban renewal along the Maribyrnong River, known for the Highpoint Shopping Centre precinct, the Maribyrnong River Walking Trail, the historic Footscray Ammunition Factory heritage site now transformed into the Footscray Arts and Innovation Precinct, and the vibrant riverside apartment and townhouse redevelopment — receives slightly elevated supply from the inner western Melbourne City West Water distribution network.

Maribyrnong's slightly elevated hardness reflects a moderate Winneke Water Treatment Plant contribution at the inner western Maribyrnong River corridor City West Water distribution sub-zone. The Winneke plant draws from the Yarra River at Yering Gorge traversing Devonian basalt terrain — contributing moderate calcium relative to the very soft Yarra Ranges direct reservoir supply. The Maribyrnong inner western Melbourne distribution at 103.5 mg/L and TDS 236.5 mg/L reflects a moderate Winneke blending proportion, noticeably harder than the softer Altona North (49 mg/L) and Newport (70.5 mg/L) inner western Hobsons Bay sub-zones.

Maribyrnong residents can expect occasional moderate limescale on taps and in kettles — descaling every two to three months is typically adequate. Hot water systems benefit from periodic inspection. The elevated lead reading (0.004 mg/L) warrants briefly running the cold tap before use. City West Water provides water quality information at citywestwater.com.au, with all ADWG health standards consistently met. Maribyrnong's Highpoint shopping precinct and the Maribyrnong River urban renewal community benefit from a safe supply meeting all ADWG standards.