Hurstville 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
100.6 mg/L
Est. Daily Cost
A$0.18
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 Hurstville, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In Hurstville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.7 yrs | 8.5 yrs | -9% |
| Washing Machine | 11.5 yrs | 12 yrs | -4% |
| Water Heater | 13.3 yrs | 15 yrs | -11% |
Regional Water Comparison
How Hurstville compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Hurstville, New South Wales | 57 mg/L | 🟢 Soft | reservoir |
| Penshurst, New South Wales | 167 mg/L | 🟠 Hard | reservoir |
| Carlton, New South Wales | 198 mg/L | 🔴 Very Hard | reservoir |
| Bexley, New South Wales | 117.5 mg/L | 🟡 Moderately Hard | reservoir |
| Kingsgrove, New South Wales | 157.5 mg/L | 🟠 Hard | reservoir |
National Benchmark
How Hurstville compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Hurstville | 57 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Hurstville's Water Unique?
Local geology and source profile
Hurstville's drinking water is supplied by Sydney Water, drawn from the Woronora Dam on the Woronora River and the integrated Warragamba and Nepean reservoir system serving the southern Sydney distribution network in New South Wales. Water hardness in Hurstville is measured at 57 mg/L — classified as soft — well within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Hurstville, in the Georges River LGA on Sydney's inner south, receives Sydney Water supply consistent with the standard Woronora-influenced southern distribution zone hardness.
Hurstville's soft supply reflects the catchment geology shared across Sydney Water's southern supply system. The Woronora Dam sits in the southern Sydney Basin where the Woronora River drains across Triassic Hawkesbury Sandstone and Narrabeen Group shale — the same silica-rich, calcium-poor formations responsible for Sydney's characteristically soft supply. The Woronora catchment contributes supply with hardness very similar to the Warragamba Dam component, consistently delivering soft water to the Georges River LGA suburbs along Sydney's southern railway corridor.
Hurstville residents benefit from low limescale accumulation on taps, in kettles, and around shower fittings — descaling every two to three months is generally adequate. Hot water systems accumulate minimal scale throughout their service life. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. A benchtop carbon filter is a popular choice for improved taste in many Hurstville households, as the Woronora catchment can occasionally carry faint natural organic notes after periods of high rainfall in the southern Sydney bushland catchment.
Geology & Source: Supplied by Sydney Water from the Woronora Dam and Warragamba reservoir system serving the southern Sydney and Georges River distribution zone — the Hurstville supply carries soft water at 57 mg/L, consistent with the Woronora catchment's Triassic Hawkesbury Sandstone geology that contributes minimal dissolved minerals to the southern Sydney supply.