Rochedale South 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
172.6 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 Rochedale South, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Rochedale South | 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 Rochedale South compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Rochedale South, Queensland | ≈ 60–119 mg/L | 🟡 Moderately Hard | mixed |
| Eight Mile Plains, Queensland | 220.5 mg/L | 🔴 Very Hard | mixed |
| Woodridge, Queensland | ≈ 60–120 mg/L | 🟡 Moderately Hard | mixed |
| Logan City, Queensland | ≈ 120–179 mg/L | 🟠 Hard | mixed |
| Wishart, Queensland | ≈ 60–120 mg/L | 🟡 Moderately Hard | mixed |
National Benchmark
How Rochedale South compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rochedale South | ≈ 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 Rochedale South's Water Unique?
Local geology and source profile
Seqwater provides the bulk water for the Rochedale South area, with supply coming from various sources including Wivenhoe Dam, Somerset Dam, North Pine Dam, and the Logan River. This water travels to treatment facilities like Mt Crosby before being distributed by Logan City Council and Urban Utilities. Residents in the Rochedale South postcode of 4123 receive water that is treated to meet stringent Australian Drinking Water Guidelines.
The water's journey begins in the Stanley River, Brisbane River, and Logan River watersheds, nestled within the Great Dividing Range. The underlying geology is a mix of Mesozoic sandstones, shales, and volcanics from the Clarence-Moreton Basin. Influences from limestone in the Bundamba Group and weathered basalt flows add bicarbonates and alkaline earth metals, resulting in a moderately mineralised supply.
Homeowners might notice mild limescale buildup in appliances like kettles and showerheads over time. Your dishwasher and washing machine could operate less efficiently due to this moderately hard water. Simple solutions include regular descaling with vinegar or using detergents specifically formulated for hard water conditions. For those who prefer it, a water softener can further reduce mineral content and benefit laundry and skin.
Geology & Source: Quaternary alluvium and Tertiary sandstones over Mesozoic Great Artesian Basin formations; limestone and basalt influences create moderate hardness
Other Queensland Water Reports
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