Ballajura Water Hardness & Quality Report (2026)
Water Hardness
Source
mixed
pH Level
7.9
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
486.7 mg/L
Est. Daily Cost
A$0.58
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 Ballajura, your appliances are currently losing 25% efficiency due to mineral buildup.
| Appliance | In Ballajura | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.5 yrs | 8.5 yrs | -59% |
| Washing Machine | 6.8 yrs | 12 yrs | -43% |
| Water Heater | 8.2 yrs | 15 yrs | -45% |
Regional Water Comparison
How Ballajura compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Ballajura, Western Australia | 184 mg/L | 🔴 Very Hard | mixed |
| Landsdale, Western Australia | 241 mg/L | 🔴 Very Hard | mixed |
| Morley, Western Australia | 237 mg/L | 🔴 Very Hard | mixed |
| Dianella, Western Australia | 234.5 mg/L | 🔴 Very Hard | mixed |
| Balga, Western Australia | 193.5 mg/L | 🔴 Very Hard | mixed |
National Benchmark
How Ballajura compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Ballajura | 184 mg/L | 🔴 High |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Ballajura's Water Unique?
Local geology and source profile
Ballajura's drinking water is supplied by the Water Corporation via the Integrated Water Supply Scheme (IWSS), blending Gnangara Mound limestone groundwater with desalinated supply from the Perth Seawater Desalination Plant for the City of Swan LGA inner north-eastern Perth metropolitan distribution in Western Australia. Water hardness in Ballajura is measured at 184 mg/L — classified as hard, approaching the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. The elevated TDS of 486.7 mg/L reflects the Gnangara Mound limestone groundwater character of the IWSS supply, similar to the nearby Willetton (184.5 mg/L) supply zone despite their geographical distance, suggesting consistent IWSS blend proportions across several Perth metropolitan sub-zones.
Ballajura's moderately hard supply reflects the Tamala Limestone groundwater contribution to the Swan LGA inner north-east IWSS distribution. The Gnangara groundwater system percolates through the Superficial Aquifer and Tamala Limestone — the porous Eocene carbonate formation of the Swan Coastal Plain — where calcium carbonate and associated mineral salts dissolve readily. The Ballajura distribution corridor receives an IWSS blend with a substantial groundwater proportion, moderating the supply hardness below the Gnangara-dominant zones (Morley 237 mg/L, Ellenbrook 213 mg/L) while still producing elevated hardness above the ADWG aesthetic midpoint.
Ballajura residents face significant limescale build-up on taps, shower screens, and in kettles — descaling every three to four weeks is common. Solar hot water systems popular in WA's sunny climate accumulate scale; annual servicing is recommended. Under WA water restrictions, garden irrigation is limited to two 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 Swan LGA inner north-east supply zone.
Geology & Source: Supplied by the Water Corporation via the Integrated Water Supply Scheme from Gnangara Mound limestone groundwater blended with desalinated supply — the Ballajura Swan inner north-east Perth distribution carries moderately hard water at 184 mg/L with elevated TDS of 486.7 mg/L, approaching the ADWG aesthetic guideline, reflecting the Gnangara Mound limestone groundwater contribution in the IWSS northern Perth supply blend.