Granville Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.3
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
86.8 mg/L
Est. Daily Cost
A$0.16
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 Granville, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Granville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.9 yrs | 8.5 yrs | -7% |
| Washing Machine | 11.8 yrs | 12 yrs | -2% |
| Water Heater | 13.6 yrs | 15 yrs | -9% |
Regional Water Comparison
How Granville compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Granville, New South Wales | 50 mg/L | 🟢 Soft | reservoir |
| Parramatta, New South Wales | 79.5 mg/L | 🟡 Moderately Hard | reservoir |
| Merrylands, New South Wales | 123 mg/L | 🟠 Hard | reservoir |
| Auburn, New South Wales | 44.5 mg/L | 🟢 Soft | reservoir |
| Chester Hill, New South Wales | 148 mg/L | 🟠 Hard | reservoir |
National Benchmark
How Granville compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Granville | 50 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Granville's Water Unique?
Local geology and source profile
Granville'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 Cumberland LGA western Sydney distribution in New South Wales. Water hardness in Granville is measured at 50 mg/L — classified as soft — well within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Granville — a historically significant western Sydney suburb known for its railway heritage as one of NSW's earliest railway centres, and the Granville TAFE and industrial service precinct adjacent to Clyde rail yards — benefits from a predominantly soft supply reflecting the Warragamba-dominant character of the Cumberland LGA western distribution zone, consistent with the adjacent Westmead (45 mg/L) sub-zone to the north in Parramatta LGA.
Granville's soft supply reflects the predominantly Warragamba Dam contribution at this western Sydney Cumberland 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 Granville Cumberland western distribution sub-zone at 50 mg/L and TDS 86.8 mg/L receives a proportionally higher Warragamba fraction compared to the harder outer western zones, placing Granville among the softer western Sydney supply sub-zones despite its Cumberland LGA urban-industrial character.
Granville 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 a practical benefit for Granville's growing residential and multicultural community in this historic western Sydney suburb.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam on the Nepean River system — the Granville Cumberland LGA western Sydney supply carries soft water at 50 mg/L, consistent with a predominantly Warragamba-dominant supply blend with a moderate Hawkesbury-Nepean component at the Cumberland western Sydney distribution sub-zone.