Wallan 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
129.9 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 Wallan, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Wallan | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.5 yrs | 8.5 yrs | -12% |
| Washing Machine | 11.2 yrs | 12 yrs | -7% |
| Water Heater | 13 yrs | 15 yrs | -13% |
Regional Water Comparison
How Wallan compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Wallan, Victoria | 64.5 mg/L | 🟡 Moderately Hard | reservoir |
| Wollert, Victoria | 104 mg/L | 🟡 Moderately Hard | reservoir |
| Craigieburn, Victoria | 35 mg/L | 🟢 Soft | reservoir |
| Roxburgh Park, Victoria | 60.5 mg/L | 🟡 Moderately Hard | reservoir |
| Mernda, Victoria | 73.5 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How Wallan compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Wallan | 64.5 mg/L | 🟡 Low |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Wallan's Water Unique?
Local geology and source profile
Wallan's drinking water is supplied by Yarra Valley Water as water retailer, with bulk supply from Melbourne Water incorporating a moderate Winneke Water Treatment Plant contribution for the Mitchell Shire LGA outer northern Melbourne metropolitan fringe in Victoria. Water hardness in Wallan is measured at 64.5 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Wallan — one of Victoria's fastest-growing regional towns on the Hume Highway at the Mitchell Shire gateway, attracting Melbourne sea-change families with new housing estates, the Wallan town centre, and proximity to the Kilmore Road rural and agricultural corridor — receives slightly elevated supply consistent with a moderate Winneke WTP blending in the outer northern metropolitan fringe distribution.
Wallan's slightly elevated hardness reflects a moderate Winneke Water Treatment Plant contribution at the outer northern Mitchell Shire metropolitan fringe distribution sub-zone. The Winneke plant draws from the Yarra River at Yering Gorge — traversing Devonian basalt terrain — contributing moderate calcium relative to the soft Yarra Ranges granite direct reservoir supply. The Wallan outer northern fringe distribution at 64.5 mg/L and TDS 129.9 mg/L reflects the Winneke blending proportion across Yarra Valley Water's outer northern fringe supply network, intermediate between the near-pure soft outer eastern zones and the higher Winneke blend inner zones.
Wallan 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 (0.003 mg/L) warrants briefly running the cold tap before use in newer Wallan estate homes. Yarra Valley Water provides water quality information at yvw.com.au, with all ADWG health standards consistently met. The slightly hard supply is within comfortable household use ranges for Wallan's fast-growing outer northern Melbourne residential community.
Geology & Source: Supplied by Yarra Valley Water (water retailer) and Melbourne Water (wholesale) incorporating a moderate Winneke Water Treatment Plant contribution — the Wallan Mitchell Shire outer northern exurban supply carries slightly hard water at 64.5 mg/L, consistent with a moderate Winneke WTP proportion at this outer northern fringe Melbourne metropolitan distribution sub-zone.