Thornlands Water Hardness & Quality Report (2026)
Water Hardness
Source
mixed
pH Level
7.9
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
502.7 mg/L
Est. Daily Cost
A$0.67
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 Thornlands, your appliances are currently losing 28% efficiency due to mineral buildup.
| Appliance | In Thornlands | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.6 yrs | 8.5 yrs | -69% |
| Washing Machine | 5.8 yrs | 12 yrs | -52% |
| Water Heater | 7.2 yrs | 15 yrs | -52% |
Regional Water Comparison
How Thornlands compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Thornlands, Queensland | 211 mg/L | 🔴 Very Hard | mixed |
| Cleveland, Queensland | 265 mg/L | 🔴 Very Hard | mixed |
| Alexandra Hills, Queensland | 266 mg/L | 🔴 Very Hard | mixed |
| Victoria Point, Queensland | 252.5 mg/L | 🔴 Very Hard | mixed |
| Capalaba, Queensland | 204.5 mg/L | 🔴 Very Hard | mixed |
National Benchmark
How Thornlands compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Thornlands | 211 mg/L | 🔴 High |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Thornlands's Water Unique?
Local geology and source profile
Thornlands' drinking water is supplied by Redland City Council Water as water retailer, with bulk supply from Seqwater drawing from Lake Wivenhoe, Lake Somerset, and Lockyer Valley groundwater through the south-east Queensland water grid for the Redland City LGA coastal distribution in Queensland. Water hardness in Thornlands is measured at 211 mg/L — classified as very hard, marginally exceeding the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Thornlands — a growing Redland City coastal residential suburb adjacent to Cleveland and Victoria Point on the Moreton Bay shore, known for the Redland Bay corridor residential development, the Ormiston wetlands edge, and the community growth along the Point O'Halloran coastal precinct — carries very hard supply consistent with the broader Redland City distribution profile.
Thornlands' elevated hardness reflects the Lockyer Valley groundwater supplement in the Redland City SEQ supply blend. Lake Wivenhoe and Somerset draw from Triassic–Jurassic granite terrain contributing moderately soft surface water, but Seqwater's supplementation from the Lockyer Valley alluvial aquifer — percolating through mineralised Jurassic–Cretaceous carbonate-cemented formations — elevates the Redland City coastal distribution to 211 mg/L and TDS 502.7 mg/L. Thornlands at 211 mg/L is toward the softer end of the Redland City supply range (Cleveland 265 mg/L, Victoria Point 252.5 mg/L, Redland Bay 210 mg/L), reflecting the Redland City coastal distribution gradient.
Thornlands residents face significant daily limescale challenges — kettle descaling every one to two weeks is common, and shower screens accumulate carbonate deposits. Hot water system elements require regular inspection. Under Queensland water restrictions, outdoor watering is limited during drought. The low lead reading (0.002 mg/L) is reassuring. Redland City Council provides water quality data online, with all ADWG health standards consistently met throughout the Redland City coastal network.
Geology & Source: Supplied by Redland City Council Water with bulk supply from Seqwater via Lake Wivenhoe and Lake Somerset, supplemented by Lockyer Valley groundwater through the south-east Queensland water grid — the Thornlands Redland City coastal supply carries very hard water at 211 mg/L with TDS of 502.7 mg/L, reflecting the Lockyer Valley groundwater proportion in the Redland City coastal distribution corridor.