Mooroolbark Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.2
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
44.5 mg/L
Est. Daily Cost
A$0.08
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 Mooroolbark, your appliances are currently losing 3% efficiency due to mineral buildup.
| Appliance | In Mooroolbark | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.8 yrs | 8.5 yrs | — |
| Washing Machine | 12.7 yrs | 12 yrs | — |
| Water Heater | 14.6 yrs | 15 yrs | -3% |
Regional Water Comparison
How Mooroolbark compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Mooroolbark, Victoria | 25.5 mg/L | 🟢 Soft | reservoir |
| Kilsyth, Victoria | 108 mg/L | 🟡 Moderately Hard | reservoir |
| Croydon, Victoria | 25 mg/L | 🟢 Soft | reservoir |
| Lilydale, Victoria | 53.5 mg/L | 🟢 Soft | reservoir |
| Ringwood East, Victoria | 14.5 mg/L | 🟢 Soft | reservoir |
National Benchmark
How Mooroolbark compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Mooroolbark | 25.5 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Mooroolbark's Water Unique?
Local geology and source profile
Mooroolbark's drinking water is supplied by Yarra Valley Water as water retailer, with bulk supply from Melbourne Water drawn from the Maroondah Reservoir and Upper Yarra Reservoir catchments in the Yarra Ranges, Victoria. Water hardness in Mooroolbark is measured at 25.5 mg/L — classified as very soft — far below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Mooroolbark, in the Yarra Ranges LGA nestled in the eastern foothills adjacent to the Maroondah catchment boundary, receives near-source Yarra Ranges supply comparable in softness to Croydon (25 mg/L) in the same corridor — consistent with the characteristic very soft supply of Melbourne's outer eastern foothills communities.
Mooroolbark's very soft supply stems from proximity to Melbourne Water's Maroondah Reservoir catchment. The Watts River system feeding Maroondah drains across pristine Devonian granite and rhyodacite of the Yarra Ranges — highly resistant igneous terrain contributing negligible dissolved minerals. Mooroolbark's position at the eastern urban fringe, with residential development abutting the Maroondah and Yarra Ranges national park boundaries, means supply reaches the Mooroolbark tap after minimal pipeline distance from the source reservoirs.
Moorolbark residents enjoy very low limescale accumulation on taps, in kettles, and around shower fittings — descaling is an occasional rather than routine task. Hot water systems accumulate minimal scale throughout their service life. Yarra Valley Water provides water quality information at yvw.com.au, with all ADWG health standards consistently met. A benchtop filter for improved taste is popular in Mooroolbark, and residents of this foothills community enjoy the practical benefits of living in one of Melbourne's softest-supplied outer suburban corridors.
Geology & Source: Supplied by Yarra Valley Water (water retailer) and Melbourne Water (wholesale) from the Maroondah Reservoir and Upper Yarra catchment systems in the Yarra Ranges — the Mooroolbark Yarra Ranges outer east Melbourne supply carries very soft water at 25.5 mg/L, reflecting the near-source Yarra Ranges reservoir supply delivered to this outer foothills community adjacent to the Maroondah catchment boundary.