Sans Souci 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
90.6 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 Sans Souci, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Sans Souci | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.9 yrs | 8.5 yrs | -7% |
| Washing Machine | 11.7 yrs | 12 yrs | -3% |
| Water Heater | 13.5 yrs | 15 yrs | -10% |
Regional Water Comparison
How Sans Souci compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Sans Souci, New South Wales | 52 mg/L | 🟢 Soft | reservoir |
| Kogarah, New South Wales | 165.5 mg/L | 🟠 Hard | reservoir |
| Carlton, New South Wales | 198 mg/L | 🔴 Very Hard | reservoir |
| Hurstville, New South Wales | 57 mg/L | 🟢 Soft | reservoir |
| Rockdale, New South Wales | 26 mg/L | 🟢 Soft | reservoir |
National Benchmark
How Sans Souci compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Sans Souci | 52 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Sans Souci's Water Unique?
Local geology and source profile
Sans Souci'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 Georges River LGA southern Sydney harbourside distribution in New South Wales. Water hardness in Sans Souci is measured at 52 mg/L — classified as soft — well below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Sans Souci — a harbourside residential suburb in the Georges River LGA on Botany Bay adjacent to Ramsgate Beach, known for the Sans Souci Leisure Centre, the Botany Bay National Park proximity, the Ramsgate Beach foreshore, and the established southern Sydney bayside community of the Rockdale–Sans Souci corridor — receives soft supply consistent with the predominantly soft character of the southern Georges River LGA Sydney Water distribution sub-zones.
Sans Souci's soft supply reflects a predominantly Warragamba Dam contribution with minimal Hawkesbury-Nepean blending at the southern Georges River Botany Bay 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 52 mg/L and TDS 90.6 mg/L, Sans Souci's supply is consistently soft alongside the surrounding inner southern Georges River sub-zones (Peakhurst 52.5 mg/L, Mortdale 43.5 mg/L, Oatley 62.5 mg/L) — all dramatically softer than the very hard Carlton sub-zone (198 mg/L) in the same Georges River LGA.
Sans Souci 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. Sans Souci's Botany Bay foreshore community and the southern Georges River harbourside corridor benefit 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 Sans Souci Georges River southern Sydney harbourside supply carries soft water at 52 mg/L with low TDS of 90.6 mg/L, reflecting the predominantly Warragamba-dominant supply at the southern Georges River LGA Sans Souci sub-zone, consistent with the soft character of the surrounding Peakhurst, Mortdale, and Oatley Georges River sub-zones.