Busselton Water Hardness & Quality Report (2026)
Water Hardness
Source
mixed
pH Level
7.8
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
426.6 mg/L
Est. Daily Cost
A$0.52
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 Busselton, your appliances are currently losing 22% efficiency due to mineral buildup.
| Appliance | In Busselton | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.2 yrs | 8.5 yrs | -51% |
| Washing Machine | 7.6 yrs | 12 yrs | -37% |
| Water Heater | 9.1 yrs | 15 yrs | -39% |
Regional Water Comparison
How Busselton compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Busselton, Western Australia | 163.5 mg/L | 🟠 Hard | mixed |
| Bunbury, Western Australia | 185 mg/L | 🔴 Very Hard | mixed |
| Australind, Western Australia | 152.5 mg/L | 🟠 Hard | mixed |
| Halls Head, Western Australia | 230.5 mg/L | 🔴 Very Hard | mixed |
| Mandurah, Western Australia | 200 mg/L | 🔴 Very Hard | mixed |
National Benchmark
How Busselton compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Busselton | 163.5 mg/L | 🟠 Moderate |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Busselton's Water Unique?
Local geology and source profile
Busselton's drinking water is supplied by the Water Corporation, drawing from Harvey Dam and Wellington Dam on the Collie–Harvey river systems and blended with local Leschenault Peninsula and South West coastal plain groundwater, supplying the City of Busselton in Western Australia's South West region. Water hardness in Busselton is measured at 163.5 mg/L — classified as moderately hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. The elevated TDS of 426.6 mg/L reflects the coastal plain limestone groundwater character in the Busselton south-west coastal water supply blend — notably harder than the Harvey and Wellington dam surface supply alone.
Busselton's moderately hard supply reflects the coastal plain limestone groundwater contribution to the South West Water Supply blend. The Busselton coastal strip is underlain by the Tamala Limestone and Superficial Aquifer system — Eocene carbonate formations similar to Perth's Gnangara Mound geology — which percolate groundwater enriched with calcium carbonate and associated dissolved mineral salts. The Harvey and Wellington dams produce relatively softer surface supply from Jarrah forest and Blackwood Plateau catchments, but the local groundwater blending required to supplement supply in this rapidly growing south-west coastal tourist hub raises the hardness and TDS above the surface-only supply level.
Busselton residents face moderate limescale build-up on taps and in kettles — descaling every four to six weeks is typical. Solar hot water systems popular in WA's sunny south-west climate accumulate scale in storage cylinders; annual servicing is recommended. Under WA water restrictions, garden irrigation is limited to two designated days per week. The elevated lead reading (0.003 mg/L) warrants briefly running the cold tap before use. The Water Corporation provides water quality information at watercorporation.com.au, with all ADWG health standards met throughout the Busselton south-west coastal supply zone.
Geology & Source: Supplied by the Water Corporation from a blend of Harvey Dam and Wellington Dam storage on the Collie–Harvey rivers and local Leschenault Peninsula limestone groundwater — the Busselton supply carries moderately hard water at 163.5 mg/L with elevated TDS of 426.6 mg/L, reflecting the local coastal plain Tamala Limestone groundwater contribution to the Busselton South West Coastal water supply blend.