Port Melbourne Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.4
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
126.3 mg/L
Est. Daily Cost
A$0.20
energy & soap waste
Source: BOM National Performance Report & ADWG · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Port Melbourne, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In Port Melbourne | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.5 yrs | 8.5 yrs | -12% |
| Washing Machine | 11.3 yrs | 12 yrs | -6% |
| Water Heater | 13.1 yrs | 15 yrs | -13% |
Regional Water Comparison
How Port Melbourne compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Port Melbourne, Victoria | 63 mg/L | 🟡 Moderately Hard | reservoir |
| City of Port Phillip, Victoria | 37 mg/L | 🟢 Soft | reservoir |
| South Melbourne, Victoria | 13 mg/L | 🟢 Soft | reservoir |
| Docklands, Victoria | 28 mg/L | 🟢 Soft | reservoir |
| Southbank, Victoria | 52 mg/L | 🟢 Soft | reservoir |
National Benchmark
How Port Melbourne compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Port Melbourne | 63 mg/L | 🟡 Low |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Port Melbourne's Water Unique?
Local geology and source profile
Port Melbourne's drinking water is supplied by South East Water as water retailer, with bulk supply from Melbourne Water distributed through the inner metropolitan network in Victoria. Water hardness in Port Melbourne is measured at 63 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Port Melbourne, in the Port Phillip LGA on the western shore of Port Phillip Bay — the historic docklands suburb of Station Pier, the Spirit of Tasmania terminal, the Gasworks arts precinct, and the rapidly densifying residential towers of Beacon Cove and Bay Street — receives supply incorporating a moderate Winneke WTP contribution, consistent with the inner Port Phillip waterfront supply corridor and harder than the very soft Melbourne CBD (41.5 mg/L) to the north-east.
Port Melbourne's slightly elevated hardness reflects a moderate Winneke Water Treatment Plant blending at this inner Port Phillip waterfront distribution sub-zone. The Winneke plant draws from the Yarra River at Yering Gorge traversing Devonian basalt and alluvial valley terrain — contributing calcium and magnesium relative to the soft granite Yarra Ranges reservoir supply. Port Melbourne's position on the inner southern waterfront receives a moderate Winneke WTP fraction, producing supply at 63 mg/L consistent with the adjacent Saint Kilda (89 mg/L) and Brighton (96 mg/L) sub-zones in the inner southern Port Phillip corridor.
Port Melbourne residents can expect occasional light to 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 (0.003 mg/L) warrants briefly running the cold tap before use in Port Melbourne's older heritage and converted warehouse buildings. South East Water provides water quality information at southeastwater.com.au, with all ADWG health standards consistently met throughout the Port Phillip inner waterfront supply zone.
Geology & Source: Supplied by South East Water (water retailer) and Melbourne Water (wholesale) incorporating a moderate Winneke Water Treatment Plant contribution from the Yarra River at Yering Gorge — the Port Melbourne Port Phillip inner waterfront supply carries slightly hard water at 63 mg/L, reflecting a moderate Winneke WTP proportion at this inner Port Phillip Bay docklands and waterfront distribution sub-zone.