Fairfield Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.1
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
45.8 mg/L
Est. Daily Cost
A$0.09
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 Fairfield, your appliances are currently losing 4% efficiency due to mineral buildup.
| Appliance | In Fairfield | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.7 yrs | 8.5 yrs | — |
| Washing Machine | 12.6 yrs | 12 yrs | — |
| Water Heater | 14.5 yrs | 15 yrs | -3% |
Regional Water Comparison
How Fairfield compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Fairfield, New South Wales | 28 mg/L | 🟢 Soft | reservoir |
| Canley Vale, New South Wales | 97.5 mg/L | 🟡 Moderately Hard | reservoir |
| Smithfield, New South Wales | 54.5 mg/L | 🟢 Soft | reservoir |
| Canley Heights, New South Wales | 147 mg/L | 🟠 Hard | reservoir |
| Fairfield West, New South Wales | 107.5 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How Fairfield compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Fairfield | 28 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Fairfield's Water Unique?
Local geology and source profile
Fairfield'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 Fairfield LGA outer south-western Sydney distribution in New South Wales. Water hardness in Fairfield is measured at 28 mg/L — classified as soft — far below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Fairfield — a large and culturally diverse outer south-western Sydney LGA known for its vibrant Vietnamese, Cambodian, and Pacific Islander community precincts along Polding Street — benefits from soft supply consistent with the Warragamba-dominant western Sydney zones, with the low TDS of 45.8 mg/L confirming predominantly pure Warragamba reservoir water at this distribution sub-zone.
Fairfield's soft supply reflects the predominant Warragamba Dam contribution at this south-western Sydney Prospect distribution sub-zone, with minimal Hawkesbury-Nepean blending. Warragamba Dam collects rainfall from the Blue Mountains sandstone plateau and Kanangra granite uplands — highly resistant terrain contributing negligible dissolved minerals — producing the characteristic low-mineral soft supply of the Warragamba-dominant zones. The Fairfield south-western distribution node at 28 mg/L and TDS 45.8 mg/L receives one of the lowest mineral supplies across the Sydney metropolitan network, softer than adjacent Yagoona (168 mg/L) in Canterbury-Bankstown across the LGA boundary.
Fairfield residents enjoy very low limescale accumulation on taps, in kettles, and around shower fittings — descaling is an occasional rather than regular task. Hot water systems accumulate minimal scale. The very low lead reading (0.001 mg/L) confirms excellent supply quality. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. The soft supply is a practical everyday benefit for Fairfield's large and active multicultural residential and hospitality community.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam on the Nepean River system — the Fairfield Fairfield LGA outer south-west Sydney supply carries soft water at 28 mg/L with low TDS of 45.8 mg/L, characteristic of the low-mineral Warragamba Dam dominant supply blend in this south-western distribution sub-zone with minimal Hawkesbury-Nepean blending.