Coorparoo Water Hardness & Quality Report (2026)
Water Hardness
~60–119 mg/L
Moderately Hardestimated · not lab-verified
Source
mixed
pH Level
7.5
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
175.2 mg/L
Est. Daily Cost
A$0.28
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 Coorparoo, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Coorparoo | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.5 yrs | 8.5 yrs | -12% |
| Washing Machine | 10.6 yrs | 12 yrs | -12% |
| Water Heater | 13.2 yrs | 15 yrs | -12% |
Regional Water Comparison
How Coorparoo compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Coorparoo, Queensland | ≈ 60–119 mg/L | 🟡 Moderately Hard | mixed |
| Camp Hill, Queensland | ≈ 60–120 mg/L | 🟡 Moderately Hard | mixed |
| New Farm, Queensland | ≈ 120–179 mg/L | 🟠 Hard | mixed |
| Annerley, Queensland | ≈ 60–120 mg/L | 🟡 Moderately Hard | mixed |
| Morningside, Queensland | ≈ 60–120 mg/L | 🟡 Moderately Hard | mixed |
National Benchmark
How Coorparoo compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Coorparoo | ≈ 60–119 mg/L | 🟡 Low |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Coorparoo's Water Unique?
Local geology and source profile
The water supply for Coorparoo comes from a mixed source, primarily treated at the Mt Crosby treatment plant. This facility draws from various water sources, which are then processed to meet drinking water standards before distribution to the community. The exact origins of the water, whether from surface reservoirs or underground aquifers, are not specified, but the treatment process ensures it is safe for consumption by Brisbane residents.
The water's journey begins in the Brisbane zone, influenced by Quaternary alluvial deposits and Tertiary sedimentary formations. These layers rest upon older Paleozoic bedrock. The presence of limestone and dolomite-rich strata within these geological layers leads to a moderate level of mineralization, which in turn results in the water having a moderately hard character.
Homeowners in Coorparoo may notice the effects of this moderately hard water on their appliances and plumbing. Over time, mineral buildup, particularly calcium and magnesium, can lead to scale formation inside pipes and on heating elements in water heaters and dishwashers, potentially reducing their efficiency and lifespan. Using a water softener can help mitigate these issues, reducing soap scum and improving the lathering of soaps and detergents. Regular descaling of appliances is also recommended to maintain optimal performance.
Geology & Source: Tertiary sedimentary formations; Paleozoic bedrock; limestone and dolomite-rich strata contribute to moderate hardness
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