Pymble Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
172.1 mg/L
Est. Daily Cost
A$0.28
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 Pymble, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Pymble | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.6 yrs | 8.5 yrs | -22% |
| Washing Machine | 10.3 yrs | 12 yrs | -14% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Pymble compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Pymble, New South Wales | 90 mg/L | 🟡 Moderately Hard | reservoir |
| Turramurra, New South Wales | 172 mg/L | 🟠 Hard | reservoir |
| Saint Ives, New South Wales | 152 mg/L | 🟠 Hard | reservoir |
| Killara, New South Wales | 58 mg/L | 🟢 Soft | reservoir |
| Wahroonga, New South Wales | 123 mg/L | 🟠 Hard | reservoir |
National Benchmark
How Pymble compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Pymble | 90 mg/L | 🟡 Low |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
Bring Boronia-quality water to your Pymble home
Shop water softeners on Amazon.com →
What Makes Pymble's Water Unique?
Local geology and source profile
Pymble's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant incorporating a moderate Hawkesbury-Nepean component for the Ku-ring-gai LGA upper north shore Sydney distribution in New South Wales. Water hardness in Pymble is measured at 90 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Pymble — a prestigious upper north shore Sydney suburb in the Ku-ring-gai LGA, known for the quiet residential streets and large lot sizes of the Pymble-Gordon corridor, the Australian Film, Television and Radio School precinct on Eaton Road, the Pymble Ladies' College campus, and the established leafy residential character of this heritage north shore community on the Sydney Trains Upper North Shore Line — receives slightly elevated supply at the upper north shore Prospect distribution sub-zone.
Pymble's slightly elevated hardness reflects a moderate Hawkesbury-Nepean component in the upper north shore Ku-ring-gai Prospect distribution blend. The Hawkesbury-Nepean system traverses Cumberland Plain alluvial terrain and Triassic carbonate-cemented Hawkesbury Sandstone deposits contributing moderate dissolved calcium before Prospect treatment. The Pymble Ku-ring-gai upper north shore distribution at 90 mg/L and TDS 172.1 mg/L reflects the slightly hard character of the northern Sydney supply corridor at this sub-zone — somewhat softer than the harder Lane Cove sub-zone (126.5 mg/L), consistent with the moderate Hawkesbury-Nepean proportion at the upper north shore distribution.
Pymble residents can expect occasional moderate 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 (0.003 mg/L) is good. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. Pymble's Ku-ring-gai upper north shore residential community and the Australian Film and Television School precinct benefit from a safe supply meeting all ADWG standards.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant with a moderate Hawkesbury-Nepean component — the Pymble Ku-ring-gai upper north shore Sydney supply carries slightly hard water at 90 mg/L with TDS of 172.1 mg/L, reflecting a moderate Hawkesbury-Nepean proportion at the upper north shore Ku-ring-gai Sydney distribution sub-zone, consistent with the slightly hard character of the northern Sydney supply corridor.