Mawson Lakes Water Hardness & Quality Report (2026)
Water Hardness
Source
mixed
pH Level
7.4
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
243.1 mg/L
Est. Daily Cost
A$0.35
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 Mawson Lakes, your appliances are currently losing 15% efficiency due to mineral buildup.
| Appliance | In Mawson Lakes | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6 yrs | 8.5 yrs | -29% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 11.2 yrs | 15 yrs | -25% |
Regional Water Comparison
How Mawson Lakes compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Mawson Lakes, South Australia | 109 mg/L | 🟡 Moderately Hard | mixed |
| Parafield Gardens, South Australia | 101 mg/L | 🟡 Moderately Hard | mixed |
| Paralowie, South Australia | 328 mg/L | 🔴 Very Hard | mixed |
| Prospect, South Australia | 284 mg/L | 🔴 Very Hard | mixed |
| Adelaide city centre, South Australia | 180.5 mg/L | 🔴 Very Hard | mixed |
National Benchmark
How Mawson Lakes compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Mawson Lakes | 109 mg/L | 🟡 Low |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Mawson Lakes's Water Unique?
Local geology and source profile
Mawson Lakes' drinking water is supplied by SA Water, drawing from a blend emphasising Mount Lofty Ranges reservoir supply — Happy Valley, Myponga, and Millbrook reservoirs — with a reduced River Murray component for the City of Salisbury LGA northern Adelaide distribution in South Australia. Water hardness in Mawson Lakes is measured at 109 mg/L — classified as moderately hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Mawson Lakes — South Australia's premier planned innovation and education precinct in northern Adelaide, home to the University of South Australia Mawson Lakes Campus, the TAFE SA Mawson Lakes Institute, the Water SA headquarters, and the Mawson Lakes residential town centre — receives notably softer supply than most SA Water Adelaide metropolitan distribution zones, reflecting a higher Mount Lofty Ranges reservoir proportion.
Mawson Lakes' remarkably soft SA Water supply (for South Australia) reflects a proportionally higher Mount Lofty Ranges reservoir contribution at this Salisbury northern Adelaide distribution sub-zone. The Mount Lofty Ranges reservoir catchments — draining Cambrian metamorphic and granitic Para–Gawler terrain — contribute lower-mineral, moderately soft water compared to the highly mineralised River Murray transfer supply. The Mawson Lakes northern Adelaide Salisbury distribution at 109 mg/L and TDS 243.1 mg/L is dramatically softer than the harder Prospect (284 mg/L) and Paralowie (328 mg/L) SA Water inner-northern Adelaide sub-zones, confirming a distinctly higher Mount Lofty Ranges reservoir fraction in this planned precinct supply zone.
Mawson Lakes residents face moderate limescale build-up on taps and in kettles — descaling every two to three months is typically adequate. Hot water systems benefit from periodic inspection. The very low lead reading (0.001 mg/L) is excellent. SA Water provides water quality information at sawater.com.au, with all ADWG health standards consistently met. Mawson Lakes' world-class innovation precinct, UniSA campus, and planned residential town centre benefit from a comparatively soft and clean SA Water supply.
Geology & Source: Supplied by SA Water from a blend emphasising Mount Lofty Ranges reservoir supply (Happy Valley, Myponga, Millbrook) with reduced River Murray proportion — the Mawson Lakes Salisbury northern Adelaide supply carries moderately hard water at 109 mg/L with TDS of 243.1 mg/L, notably softer than most SA Water metropolitan zones, reflecting a proportionally higher Mount Lofty Ranges reservoir fraction at this planned northern Adelaide Salisbury distribution zone.