Potts Point Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.6
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
216.4 mg/L
Est. Daily Cost
A$0.34
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 Potts Point, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Potts Point | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6 yrs | 8.5 yrs | -29% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 11.3 yrs | 15 yrs | -25% |
Regional Water Comparison
How Potts Point compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Potts Point, New South Wales | 108.5 mg/L | 🟡 Moderately Hard | reservoir |
| Darlinghurst, New South Wales | 197 mg/L | 🔴 Very Hard | reservoir |
| Paddington, New South Wales | 174 mg/L | 🟠 Hard | reservoir |
| Sydney Central Business District, New South Wales | 120 mg/L | 🟠 Hard | reservoir |
| Sydney, New South Wales | 50 mg/L | 🟢 Soft | reservoir |
National Benchmark
How Potts Point compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Potts Point | 108.5 mg/L | 🟡 Low |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Potts Point's Water Unique?
Local geology and source profile
Potts Point's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant incorporating a moderate Hawkesbury-Nepean component for the City of Sydney LGA inner eastern distribution in New South Wales. Water hardness in Potts Point is measured at 108.5 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Potts Point — one of Sydney's most cosmopolitan inner eastern suburbs on the headland between Woolloomooloo Bay and Elizabeth Bay, known for the Macleay Street café, bar, and restaurant strip, the art deco apartment buildings, the Kings Cross heritage precinct and Fitzroy Gardens, and the dense residential apartment community of this vibrant inner city neighbourhood — receives slightly elevated supply, harder than the soft Redfern sub-zone (60 mg/L) in the same City of Sydney LGA, reflecting the moderate Hawkesbury-Nepean proportion at this eastern inner city distribution sub-zone.
Potts Point's slightly elevated hardness reflects a moderate Hawkesbury-Nepean component in the inner eastern City of Sydney LGA Prospect distribution blend. The Hawkesbury-Nepean system traverses Cumberland Plain alluvial terrain and Triassic carbonate-cemented deposits contributing moderate dissolved calcium before Prospect treatment. The Potts Point City of Sydney inner eastern distribution at 108.5 mg/L and TDS 216.4 mg/L is intermediate between the very soft Redfern (60 mg/L) and the hard Darlinghurst (197 mg/L) sub-zones, confirming dramatic supply blend variation across the City of Sydney LGA distribution network.
Potts Point 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. Potts Point's Macleay Street community and the Kings Cross heritage 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 Potts Point City of Sydney LGA inner eastern Sydney supply carries slightly hard water at 108.5 mg/L with TDS of 216.4 mg/L, harder than the soft Redfern sub-zone (60 mg/L) in the same City of Sydney LGA, reflecting a moderate Hawkesbury-Nepean proportion at this Potts Point distribution sub-zone.