Eastwood Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
172 mg/L
Est. Daily Cost
A$0.28
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 Eastwood, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Eastwood | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.6 yrs | 8.5 yrs | -22% |
| Washing Machine | 10.3 yrs | 12 yrs | -14% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Eastwood compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Eastwood, New South Wales | 90 mg/L | 🟡 Moderately Hard | reservoir |
| West Ryde, New South Wales | 71 mg/L | 🟡 Moderately Hard | reservoir |
| Epping, New South Wales | 51 mg/L | 🟢 Soft | reservoir |
| Marsfield, New South Wales | 61 mg/L | 🟡 Moderately Hard | reservoir |
| Carlingford, New South Wales | 41 mg/L | 🟢 Soft | reservoir |
National Benchmark
How Eastwood compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Eastwood | 90 mg/L | 🟡 Low |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Eastwood's Water Unique?
Local geology and source profile
Eastwood's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant blending Warragamba Dam storage with a moderate Hawkesbury-Nepean component for the Ryde LGA upper North Shore distribution in New South Wales. Water hardness in Eastwood is measured at 90 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Eastwood — a bustling upper North Shore suburb at the centre of Sydney's largest Korean commercial precinct along Rowe Street, Shaftsbury Road, and the Eastwood Shopping Centre, and home to a thriving multicultural community — receives supply consistent with the Ryde LGA North Shore supply corridor, positioned at a similar hardness to Burwood (89.5 mg/L) and Seven Hills (94.5 mg/L) across the intermediate inner-to-middle Sydney supply zones.
Eastwood's slightly elevated hardness reflects the moderate Hawkesbury-Nepean contribution in the upper North Shore Ryde Prospect distribution blend. The Hawkesbury-Nepean system traverses Cumberland Plain alluvial terrain and Triassic Hawkesbury Sandstone escarpment — dissolving moderate calcium bicarbonate before Prospect treatment. The Eastwood upper North Shore Ryde distribution sub-zone receives an intermediate Hawkesbury-Nepean fraction, consistent with the hardness gradient pattern across the middle North Shore and Ryde plateau supply corridor.
Eastwood residents can expect 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 elevated lead reading (0.003 mg/L) warrants briefly running the cold tap before use in older Eastwood homes. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. Eastwood's commercial and hospitality precinct, particularly its extensive restaurant and café industry, benefits from water quality that meets all safe drinking standards.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant blending Warragamba Dam with a moderate Hawkesbury-Nepean component — the Eastwood Ryde LGA upper North Shore supply carries slightly hard water at 90 mg/L, consistent with the moderate Hawkesbury-Nepean proportion characteristic of the upper North Shore Ryde distribution corridor.