Eltham 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
67.4 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 Eltham, your appliances are currently losing 4% efficiency due to mineral buildup.
| Appliance | In Eltham | 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 Eltham compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Eltham, Victoria | ≈ 0–59 mg/L | 🟢 Soft | reservoir |
| Templestowe, Victoria | ≈ 0–60 mg/L | 🟢 Soft | reservoir |
| Templestowe Lower, Victoria | ≈ 0–60 mg/L | 🟢 Soft | reservoir |
| Doncaster East, Victoria | ≈ 0–60 mg/L | 🟢 Soft | reservoir |
| Greensborough, Victoria | ≈ 0–60 mg/L | 🟢 Soft | reservoir |
National Benchmark
How Eltham compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Eltham | ≈ 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 Eltham's Water Unique?
Local geology and source profile
Yarra Valley Water supplies Eltham and nearby areas like Eltham North in Victoria, Australia. Our water originates from multiple reservoirs within the Yarra catchment, including Sugarloaf, Maroondah, and Thomson Reservoirs. This surface water is treated at the Winneke and Preston plants before traveling through an extensive distribution network to reach metropolitan Melbourne suburbs north of the city.
The watershed geology is dominated by ancient Paleozoic sedimentary rocks, such as Silurian siltstones and Ordovician sandstones, with some minor volcanics. Unlike regions with abundant limestone, these prevailing formations and granitic intrusions mean minimal dissolved calcium and magnesium are leached into the supply. This geological makeup inherently results in characteristically soft water, picking up few hardness ions from the watershed's soils.
Because our water is very soft, you won't have to worry about limescale buildup damaging your appliances or plumbing. This means your kettles, washing machines, and water heaters will likely last longer without the need for descaling. Many residents also enjoy how easily soaps and shampoos lather, leaving skin and hair feeling softer. A water softener isn't necessary for Eltham; routine filtration is generally sufficient. The water consistently meets Australian Drinking Water Guidelines, scoring an impressive 9.5/10 on WaterScore.
Geology & Source: Yarra River catchment; Paleozoic sedimentary rocks (siltstones, sandstones) and volcanics; minimal limestone yields soft water
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