St Kilda East Water Hardness & Quality Report (2026)
Water Hardness
~0–59 mg/L
Softestimated · not lab-verified
Source
reservoir
pH Level
7
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
51.5 mg/L
Est. Daily Cost
A$0.10
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 St Kilda East, your appliances are currently losing 4% efficiency due to mineral buildup.
| Appliance | In St Kilda East | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.2 yrs | 8.5 yrs | -4% |
| Washing Machine | 11.5 yrs | 12 yrs | -4% |
| Water Heater | 14.4 yrs | 15 yrs | -4% |
Regional Water Comparison
How St Kilda East compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ St Kilda East, Victoria | ≈ 0–59 mg/L | 🟢 Soft | reservoir |
| Prahran, Victoria | ≈ 0–60 mg/L | 🟢 Soft | reservoir |
| Saint Kilda, Victoria | ≈ 0–60 mg/L | 🟢 Soft | reservoir |
| Elsternwick, Victoria | ≈ 0–60 mg/L | 🟢 Soft | reservoir |
| Elwood, Victoria | ≈ 0–60 mg/L | 🟢 Soft | reservoir |
National Benchmark
How St Kilda East compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ St Kilda East | ≈ 0–59 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes St Kilda East's Water Unique?
Local geology and source profile
South East Water provides drinking water to St Kilda East, serving over 1.7 million residents across Port Phillip and Casey. Their supply originates from protected reservoirs like Cardinia, Thomson, and Silvan, all managed by Melbourne Water. Water is treated at facilities including the Cardinia and Pimpama treatment plants before distribution through extensive networks in this urban coastal area.
The water's journey begins in the Yarra catchment watershed, drawing from Paleozoic-era siliceous sedimentary and volcanic bedrock within the Great Dividing Range. Unlike regions with significant limestone aquifers, this geological profile lacks calcareous or evaporitic influences. Consequently, the water is naturally soft, containing minimal alkaline earth minerals like calcium and magnesium, a characteristic maintained through careful catchment protection and treatment.
Homeowners in St Kilda East will find this soft water doesn't build up limescale in kettles, pipes, or appliances, potentially extending their lifespan. You might notice soap lathers more easily, and skin and hair can feel cleaner after washing due to less soap scum. Because the water is already soft, a water softener isn't necessary, and routine descaling of fixtures is generally not required. Annual checks on water heaters can, however, prevent any rare sediment issues.
Geology & Source: Siltstones, sandstones, mudstones of the Lachlan Fold Belt; Quaternary basalts; low-carbonate, siliceous formations yield soft water
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