Westmead Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.2
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
77 mg/L
Est. Daily Cost
A$0.14
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 Westmead, your appliances are currently losing 6% efficiency due to mineral buildup.
| Appliance | In Westmead | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.1 yrs | 8.5 yrs | -5% |
| Washing Machine | 11.9 yrs | 12 yrs | -1% |
| Water Heater | 13.8 yrs | 15 yrs | -8% |
Regional Water Comparison
How Westmead compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Westmead, New South Wales | 45 mg/L | 🟢 Soft | reservoir |
| North Parramatta, New South Wales | 170 mg/L | 🟠 Hard | reservoir |
| Wentworthville, New South Wales | 55.5 mg/L | 🟢 Soft | reservoir |
| Parramatta, New South Wales | 79.5 mg/L | 🟡 Moderately Hard | reservoir |
| Northmead, New South Wales | 88 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How Westmead compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Westmead | 45 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Westmead's Water Unique?
Local geology and source profile
Westmead's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam (Nepean River system) for the Parramatta LGA western Sydney distribution in New South Wales. Water hardness in Westmead is measured at 45 mg/L — classified as soft — well within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Westmead — the major health and medical precinct of western Sydney, home to Westmead Hospital, the Children's Hospital at Westmead, the Westmead Health Precinct of research institutes, and major educational facilities adjacent to Parramatta — benefits from a predominantly soft supply reflecting the Warragamba-dominant distribution at this inner western Parramatta sub-zone.
Westmead's soft supply reflects the predominantly Warragamba Dam contribution at this western Sydney Parramatta Prospect distribution sub-zone. Warragamba Dam collects rainfall from the Blue Mountains sandstone plateau and Kanangra–Boyd granite uplands — chemically resistant terrain contributing minimal dissolved minerals. The Westmead Parramatta western distribution node at 45 mg/L and TDS 77 mg/L receives a proportionally higher Warragamba fraction compared to the harder outer western zones (Glenmore Park 199.5 mg/L) along the Hawkesbury-Nepean influence gradient, placing Westmead among the softer inner western Sydney supply sub-zones.
Westmead residents enjoy very low limescale accumulation on taps, in kettles, and around shower fittings — descaling every two to three months is typically adequate. Hot water systems accumulate minimal scale. The low lead reading (0.002 mg/L) is reassuring. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. The soft supply is well suited to Westmead's major hospital and health precinct, where water quality is of significant practical importance across the extensive research and clinical facilities.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam on the Nepean River system with a moderate Hawkesbury-Nepean component — the Westmead Parramatta LGA western Sydney supply carries soft water at 45 mg/L, consistent with a predominantly Warragamba-dominant supply blend at the Parramatta western Sydney distribution sub-zone.