Sylvania 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
88.6 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 Sylvania, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Sylvania | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.9 yrs | 8.5 yrs | -7% |
| Washing Machine | 11.7 yrs | 12 yrs | -3% |
| Water Heater | 13.6 yrs | 15 yrs | -9% |
Regional Water Comparison
How Sylvania compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Sylvania, New South Wales | 51 mg/L | 🟢 Soft | reservoir |
| Miranda, New South Wales | 88 mg/L | 🟡 Moderately Hard | reservoir |
| Caringbah, New South Wales | 42 mg/L | 🟢 Soft | reservoir |
| Oatley, New South Wales | 62.5 mg/L | 🟡 Moderately Hard | reservoir |
| Sans Souci, New South Wales | 52 mg/L | 🟢 Soft | reservoir |
National Benchmark
How Sylvania compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Sylvania | 51 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Sylvania's Water Unique?
Local geology and source profile
Sylvania'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 Sutherland Shire LGA southern Sydney distribution in New South Wales. Water hardness in Sylvania is measured at 51 mg/L — classified as soft — well below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Sylvania — a harbourside residential suburb in the Sutherland Shire LGA adjacent to Miranda and Kangaroo Point on Port Hacking, known for the Sylvania Waters canal estate, the Southgate Shopping Centre, the Sylvania Park and Port Hacking foreshore, and the well-established Sutherland Shire community on the Port Hacking waterfront — receives soft supply consistent with the soft character of the southern Sutherland Shire sub-zones, contrasting with the harder Sutherland sub-zone (132 mg/L) within the same LGA.
Sylvania's soft supply reflects a predominantly Warragamba Dam contribution with minimal Hawkesbury-Nepean blending at the Sylvania Sutherland Shire Prospect distribution sub-zone. Warragamba Dam collects rainfall from the Blue Mountains sandstone plateau and Kanangra–Boyd granite uplands — chemically resistant terrain contributing negligible dissolved minerals. At 51 mg/L and TDS 88.6 mg/L, Sylvania's supply is consistent with the surrounding soft Sutherland Shire sub-zones (Caringbah 42 mg/L, Caringbah South 47.5 mg/L) — all predominantly Warragamba-dominant, contrasting with the harder Sutherland sub-zone (132 mg/L) in the same LGA.
Sylvania 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 (0.002 mg/L) is excellent. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. Sylvania's Port Hacking foreshore community and the Sutherland Shire canal estate benefits from this soft supply meeting all ADWG standards.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam — the Sylvania Sutherland Shire southern Sydney supply carries soft water at 51 mg/L with low TDS of 88.6 mg/L, reflecting the predominantly Warragamba-dominant supply at the Sylvania Sutherland sub-zone, consistent with the soft Caringbah (42 mg/L) and Caringbah South (47.5 mg/L) sub-zones in the same LGA.