North Ryde Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.4
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
139.5 mg/L
Est. Daily Cost
A$0.24
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 North Ryde, your appliances are currently losing 10% efficiency due to mineral buildup.
| Appliance | In North Ryde | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.1 yrs | 8.5 yrs | -16% |
| Washing Machine | 10.8 yrs | 12 yrs | -10% |
| Water Heater | 12.6 yrs | 15 yrs | -16% |
Regional Water Comparison
How North Ryde compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ North Ryde, New South Wales | 75.5 mg/L | 🟡 Moderately Hard | reservoir |
| Marsfield, New South Wales | 61 mg/L | 🟡 Moderately Hard | reservoir |
| Ryde, New South Wales | 159 mg/L | 🟠 Hard | reservoir |
| Gladesville, New South Wales | 32 mg/L | 🟢 Soft | reservoir |
| Lane Cove North, New South Wales | 181 mg/L | 🔴 Very Hard | reservoir |
National Benchmark
How North Ryde compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ North Ryde | 75.5 mg/L | 🟡 Low |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes North Ryde's Water Unique?
Local geology and source profile
North Ryde's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant with a low Hawkesbury-Nepean component for the Ryde City LGA inner northern Sydney distribution in New South Wales. Water hardness in North Ryde is measured at 75.5 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. North Ryde — a major inner northern Sydney commercial and technology hub in the Ryde City LGA, home to the Macquarie Park Technology Precinct with major pharmaceutical, technology, and corporate campuses, the Ryde Eastwood corridor, the Lane Cove National Park and the Shrimptons Creek bushland corridor, and the North Ryde station metro interchange — receives slightly elevated supply reflecting a low-to-moderate Hawkesbury-Nepean proportion at the inner northern Ryde City Prospect distribution sub-zone.
North Ryde's slightly elevated hardness reflects a low-to-moderate Hawkesbury-Nepean component in the inner northern Ryde City Prospect distribution blend. The predominantly Warragamba Dam contribution provides soft supply from the Blue Mountains catchment, while the low Hawkesbury-Nepean fraction from the Cumberland Plain alluvial terrain contributes moderate dissolved minerals. At 75.5 mg/L and TDS 139.5 mg/L, North Ryde's supply is consistent with the slightly hard inner northern Sydney Prospect distribution character for the Ryde City sub-zones, reflecting the predominantly Warragamba-dominant blend with a low Hawkesbury-Nepean component.
North Ryde residents can expect occasional light limescale on taps and in kettles — descaling every two to three months is typically adequate. Hot water systems benefit from periodic inspection. The low lead reading (0.002 mg/L) is excellent. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. North Ryde's Macquarie Park technology precinct and the Ryde City inner northern community benefit from a safe supply meeting all ADWG standards.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant with a low Hawkesbury-Nepean component — the North Ryde Ryde City inner northern Sydney supply carries slightly hard water at 75.5 mg/L with TDS of 139.5 mg/L, reflecting a low-to-moderate Hawkesbury-Nepean proportion in the inner northern Ryde City LGA North Ryde Prospect distribution sub-zone.