Highton Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
232.1 mg/L
Est. Daily Cost
A$0.32
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 Highton, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Highton | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.2 yrs | 8.5 yrs | -27% |
| Washing Machine | 9.8 yrs | 12 yrs | -18% |
| Water Heater | 11.5 yrs | 15 yrs | -23% |
Regional Water Comparison
How Highton compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Highton, Victoria | 102 mg/L | 🟡 Moderately Hard | reservoir |
| Belmont, Victoria | 80 mg/L | 🟡 Moderately Hard | reservoir |
| Grovedale, Victoria | 11 mg/L | 🟢 Soft | reservoir |
| Geelong, Victoria | 25 mg/L | 🟢 Soft | reservoir |
| Corio, Victoria | 44.5 mg/L | 🟢 Soft | reservoir |
National Benchmark
How Highton compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Highton | 102 mg/L | 🟡 Low |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Highton's Water Unique?
Local geology and source profile
Highton's drinking water is supplied by Barwon Water, drawing from the Barwon River at Inverleigh and the Wurdee Boluc Reservoir on the Moorabool River in south-west Victoria, serving the City of Greater Geelong LGA. Water hardness in Highton is measured at 102 mg/L — classified as moderately hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Highton, in the Greater Geelong LGA — a prestige residential suburb of established homes on the Barwon River escarpment above the Barwon River gorge at Rippleside, adjacent to Geelong's education and health precinct — receives supply characteristic of Barwon Water's Geelong metropolitan distribution, reflecting the mineral character of the Barwon River system's western Victorian geology.
Highton's moderately hard supply reflects the Devonian basalt and Otway Supergroup geology of the Barwon River catchment. The Barwon River flows through the Victorian Western District volcanic basalt plains — where dissolved calcium and magnesium minerals weather from the basaltic terrain and alluvial Plains sediments — before treatment at Barwon Water's Batesford treatment plant. The 102 mg/L for Highton is consistent with the broader Geelong metropolitan supply hardness range, reflecting the distinctly different basalt-influenced supply character compared to the pure granite catchments of Melbourne's Yarra Ranges supply (and the extraordinarily soft Otway-sourced Torquay supply at just 6 mg/L).
Highton residents face moderate limescale build-up on taps and in kettles — descaling every two to three months is typically needed. Hot water systems benefit from periodic inspection. The elevated lead reading (0.004 mg/L) warrants briefly running the cold tap before use in older Highton homes in the established Geelong Barwon escarpment precinct. Barwon Water provides water quality information at barwonwater.com.au, with all ADWG health standards consistently met throughout the Greater Geelong inner western supply zone.
Geology & Source: Supplied by Barwon Water from the Barwon River and Wurdee Boluc Reservoir system — the Highton Greater Geelong inner western supply carries moderately hard water at 102 mg/L, reflecting the Devonian basalt and Otway Supergroup geology of the Barwon River catchment in the western Victorian volcanic and sedimentary plains.