Robina Water Hardness & Quality Report (2026)
Water Hardness
Source
mixed
pH Level
8.5
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
837.7 mg/L
Est. Daily Cost
A$0.91
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 Robina, your appliances are currently losing 38% efficiency due to mineral buildup.
| Appliance | In Robina | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Robina compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Robina, Queensland | 288 mg/L | 🔴 Very Hard | mixed |
| Varsity Lakes, Queensland | 236.5 mg/L | 🔴 Very Hard | mixed |
| Mudgeeraba, Queensland | 295.5 mg/L | 🔴 Very Hard | mixed |
| Burleigh Waters, Queensland | 216.5 mg/L | 🔴 Very Hard | mixed |
| Mermaid Waters, Queensland | 233 mg/L | 🔴 Very Hard | mixed |
National Benchmark
How Robina compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Robina | 288 mg/L | 🔴 High |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Robina's Water Unique?
Local geology and source profile
Robina's drinking water is supplied by Gold Coast Water and Waste, with bulk water managed by Seqwater from the Hinze Dam on the Nerang River and supplemented heavily during dry periods by Lockyer Valley groundwater through the south-east Queensland water grid, in the southern Gold Coast urban centre, Queensland. Water hardness in Robina is measured at 288 mg/L — classified as very hard, substantially exceeding the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. The extraordinary TDS of 837.7 mg/L makes Robina's supply among the most mineralised of any Australian urban residential area — comparable only to the most extreme Alice Springs and Morphett Vale measurements.
Robina's extreme hardness and TDS reflects the overwhelmingly dominant Lockyer Valley alluvial groundwater component reaching this southern Gold Coast distribution zone. The Lockyer Valley groundwater percolates through Triassic–Jurassic carbonate-cemented sedimentary formations — highly mineralised aquifer terrain where calcium, magnesium, and associated dissolved salts concentrate to extreme levels. The inland Robina residential corridor sits at the end of a long supply pipeline from the Hinze Dam, where Seqwater's groundwater-reliant dry-period management maximises the proportion of the highly mineralised groundwater component reaching the Robina distribution zone.
Robina residents deal with the most severe scale conditions of any Gold Coast suburb — kettle descaling is a weekly necessity, shower screens accumulate thick carbonate film within days, and hot water system elements fail within three to five years without maintenance. A water softener is a practical necessity rather than a luxury for Robina households. Under Queensland water restrictions, limiting outdoor water use is mandatory. Seqwater and Gold Coast Water publish water quality data online with all ADWG health standards met, but the extreme aesthetic challenge makes water treatment equipment a standard feature of most Robina properties.
Geology & Source: Supplied by Gold Coast Water and Waste with bulk water managed by Seqwater, heavily blended with Lockyer Valley alluvial groundwater during dry periods — the Robina southern Gold Coast distribution carries very hard supply at 288 mg/L with extreme TDS of 837.7 mg/L, among the most mineralised urban supplies in Australia, reflecting the overwhelmingly groundwater-dominant blend reaching this inland Gold Coast residential zone.