Crestmead Water Hardness & Quality Report (2026)
Water Hardness
Source
mixed
pH Level
8.4
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
805.2 mg/L
Est. Daily Cost
A$0.88
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 Crestmead, your appliances are currently losing 37% efficiency due to mineral buildup.
| Appliance | In Crestmead | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3.3 yrs | 12 yrs | -73% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Crestmead compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Crestmead, Queensland | 279 mg/L | 🔴 Very Hard | mixed |
| Marsden, Queensland | 280 mg/L | 🔴 Very Hard | mixed |
| Kingston, Queensland | 279 mg/L | 🔴 Very Hard | mixed |
| Regents Park, Queensland | 190 mg/L | 🔴 Very Hard | mixed |
| Logan City, Queensland | 223.5 mg/L | 🔴 Very Hard | mixed |
National Benchmark
How Crestmead compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Crestmead | 279 mg/L | 🔴 High |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Crestmead's Water Unique?
Local geology and source profile
Crestmead's drinking water is supplied by Logan Water (Logan City Council Water) as water retailer, with bulk supply from Seqwater drawing from Lake Wivenhoe, Lake Somerset, and dominant Lockyer Valley groundwater through the south-east Queensland water grid for the Logan City LGA inner southern distribution in Queensland. Water hardness in Crestmead is measured at 279 mg/L — classified as hard, substantially exceeding the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Crestmead — a large inner southern Logan City suburb adjacent to Kingston and the Logan Hyperdome precinct, known for the Crestmead industrial estate, the Crestmead State School community, and the established residential character of the inner southern Logan City LGA — carries among the hardest supply in the Logan City distribution network, comparable to the very hard Marsden (280 mg/L).
Crestmead's very high hardness reflects the dominant Lockyer Valley groundwater supplement in the inner southern Logan City SEQ supply blend. Lake Wivenhoe and Somerset contribute moderately soft surface water from Triassic–Jurassic granite terrain of the Great Dividing Range, but Seqwater's heavy supplementation from the Lockyer Valley alluvial aquifer — percolating through highly mineralised Jurassic–Cretaceous carbonate-cemented Darling Downs formations — drives the inner southern Logan distribution to 279 mg/L and extreme TDS 805.2 mg/L. Crestmead's very high TDS further confirms the dominant groundwater character of the inner southern Logan City supply zone.
Crestmead residents face severe daily limescale challenges — kettle descaling weekly is standard, shower screens and tapware accumulate heavy deposits, and hot water systems require regular annual inspection. Under Queensland water restrictions, outdoor watering is limited. The elevated lead reading (0.004 mg/L) warrants briefly running the cold tap before use. Logan Water provides water quality data online, with all ADWG health standards consistently met. Crestmead's inner southern Logan City community benefits from supply meeting all ADWG safe drinking standards.
Geology & Source: Supplied by Logan Water (Logan City Council) with bulk supply from Seqwater via Wivenhoe and Somerset dams with dominant Lockyer Valley groundwater supplementation — the Crestmead Logan City inner southern supply carries hard water at 279 mg/L with extreme TDS of 805.2 mg/L, among the hardest Logan City sub-zones, comparable to Marsden (280 mg/L), reflecting the dominant Lockyer Valley groundwater proportion in the Logan City southern distribution.