Gladesville Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.2
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
52.9 mg/L
Est. Daily Cost
A$0.10
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 Gladesville, your appliances are currently losing 4% efficiency due to mineral buildup.
| Appliance | In Gladesville | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.5 yrs | 8.5 yrs | — |
| Washing Machine | 12.4 yrs | 12 yrs | — |
| Water Heater | 14.3 yrs | 15 yrs | -5% |
Regional Water Comparison
How Gladesville compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Gladesville, New South Wales | 32 mg/L | 🟢 Soft | reservoir |
| Drummoyne, New South Wales | 176.5 mg/L | 🟠 Hard | reservoir |
| Ryde, New South Wales | 159 mg/L | 🟠 Hard | reservoir |
| Concord, New South Wales | 120 mg/L | 🟠 Hard | reservoir |
| North Ryde, New South Wales | 75.5 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How Gladesville compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Gladesville | 32 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Gladesville's Water Unique?
Local geology and source profile
Gladesville'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 Hunters Hill LGA inner northern Sydney distribution in New South Wales. Water hardness in Gladesville is measured at 32 mg/L — classified as soft — well below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Gladesville — a vibrant inner northern Sydney suburb on the Lane Cove River in the Hunters Hill LGA, known for the Victoria Road shopping and dining strip, the Gladesville Bridge heritage icon over the Parramatta River, the Huntleys Cove marina precinct, and the established waterfront residential character of this much-loved inner northern Sydney riverside community — receives notably soft supply for an inner northern Sydney suburb, with minimal Hawkesbury-Nepean blending at this Hunters Hill distribution sub-zone.
Gladesville's soft supply reflects a predominantly Warragamba Dam contribution with minimal Hawkesbury-Nepean blending at the Hunters Hill LGA inner northern Prospect distribution sub-zone. Despite its inner northern Sydney location — neighbouring the harder Lane Cove sub-zone (126.5 mg/L) — the Gladesville Hunters Hill distribution apparently receives a predominantly Warragamba-dominant supply routing through the Prospect distribution, contributing near-zero dissolved minerals from the Blue Mountains sandstone plateau catchment. The Gladesville Hunters Hill distribution at 32 mg/L and TDS 52.9 mg/L is remarkably soft for this inner northern Sydney sub-zone.
Gladesville residents enjoy low limescale accumulation on taps and in kettles — descaling every two to three months is typically adequate. Hot water systems accumulate minimal scale. The very low lead reading (0.001 mg/L) is excellent. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. Gladesville's Victoria Road waterfront community and the Gladesville Bridge precinct benefit from this soft, clean supply meeting all ADWG standards.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam — the Gladesville Hunters Hill inner northern Sydney supply carries soft water at 32 mg/L with very low TDS of 52.9 mg/L, notably soft for an inner northern Sydney sub-zone, reflecting a predominantly Warragamba-dominant supply with minimal Hawkesbury-Nepean component at the Hunters Hill Gladesville distribution sub-zone.