Slacks Creek 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
505.4 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 Slacks Creek, your appliances are currently losing 28% efficiency due to mineral buildup.
| Appliance | In Slacks Creek | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.6 yrs | 8.5 yrs | -69% |
| Washing Machine | 5.7 yrs | 12 yrs | -53% |
| Water Heater | 7.1 yrs | 15 yrs | -53% |
Regional Water Comparison
How Slacks Creek compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Slacks Creek, Queensland | 212.5 mg/L | 🔴 Very Hard | mixed |
| Shailer Park, Queensland | 232 mg/L | 🔴 Very Hard | mixed |
| Kingston, Queensland | 279 mg/L | 🔴 Very Hard | mixed |
| Logan City, Queensland | 223.5 mg/L | 🔴 Very Hard | mixed |
| Woodridge, Queensland | 271 mg/L | 🔴 Very Hard | mixed |
National Benchmark
How Slacks Creek compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Slacks Creek | 212.5 mg/L | 🔴 High |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Slacks Creek's Water Unique?
Local geology and source profile
Slacks Creek's drinking water is supplied by Logan Water (Logan City Council's water utility), with bulk supply from Seqwater incorporating dominant Lockyer Valley groundwater supplementation through the south-east Queensland water grid for the Logan City Council LGA distribution in Queensland. Water hardness in Slacks Creek is measured at 212.5 mg/L — classified as hard, exceeding the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Slacks Creek — a residential suburb in the Logan City LGA adjacent to Woodridge and Kingston on the Slacks Creek waterway, known for the established Logan City inner residential community, the Browns Plains Road retail corridor, and the Woodridge–Slacks Creek–Kingston inner Logan residential precinct — receives hard supply from the Logan City Water distribution driven by the dominant Lockyer Valley groundwater proportion in the SEQ grid.
Slacks Creek's hard supply reflects an elevated Lockyer Valley groundwater proportion in the Logan City Water SEQ supply blend. The Lockyer Valley alluvial aquifer percolates through highly mineralised Jurassic–Cretaceous carbonate-cemented Darling Downs formations — accumulating very high dissolved calcium, magnesium, and carbonates. At 212.5 mg/L and TDS 505.4 mg/L, Slacks Creek exceeds the ADWG 200 mg/L aesthetic guideline, though it is considerably softer than the harder Kingston (279 mg/L) and Crestmead (279 mg/L) sub-zones in the same Logan City LGA — reflecting a somewhat lower Lockyer Valley groundwater proportion at the Slacks Creek distribution sub-zone.
Slacks Creek residents face significant limescale on taps and in kettles — descaling every two to four weeks is typical. Hot water systems benefit from annual inspection. Under Queensland water restrictions, outdoor watering is regulated. The very low lead reading (0.002 mg/L) is excellent. Logan Water provides water quality information at loganwater.com.au, with all ADWG health standards consistently met. Slacks Creek's Logan City community benefits from supply meeting all ADWG safe drinking standards.
Geology & Source: Supplied by Logan Water (Logan City Council's water utility) with bulk supply from Seqwater via dominant Lockyer Valley groundwater supplementation — the Slacks Creek Logan City supply carries hard water at 212.5 mg/L with TDS of 505.4 mg/L, exceeding the ADWG aesthetic guideline of 200 mg/L, reflecting the elevated Lockyer Valley groundwater proportion in the Logan City Slacks Creek distribution sub-zone.