Mascot Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.9
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
358.6 mg/L
Est. Daily Cost
A$0.51
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 Mascot, your appliances are currently losing 21% efficiency due to mineral buildup.
| Appliance | In Mascot | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.3 yrs | 8.5 yrs | -49% |
| Washing Machine | 7.6 yrs | 12 yrs | -37% |
| Water Heater | 9.2 yrs | 15 yrs | -39% |
Regional Water Comparison
How Mascot compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Mascot, New South Wales | 161 mg/L | 🟠 Hard | reservoir |
| Botany, New South Wales | 199 mg/L | 🔴 Very Hard | reservoir |
| Zetland, New South Wales | 168 mg/L | 🟠 Hard | reservoir |
| Kensington, New South Wales | 195 mg/L | 🔴 Very Hard | reservoir |
| Newtown, New South Wales | 121 mg/L | 🟠 Hard | reservoir |
National Benchmark
How Mascot compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Mascot | 161 mg/L | 🟠 Moderate |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
Bring Boronia-quality water to your Mascot home
Shop water softeners on Amazon.com →
What Makes Mascot's Water Unique?
Local geology and source profile
Mascot's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant with a significant Hawkesbury-Nepean component for the Bayside NSW LGA inner southern Sydney distribution in New South Wales. Water hardness in Mascot is measured at 161 mg/L — classified as moderately hard, approaching the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Mascot — a densely populated inner south Sydney suburb adjacent to Sydney Kingsford Smith Airport and Botany Bay, known for its airport noise-affected residential precincts, the South Sydney industrial corridor, and significant apartment redevelopment — carries supply with a notable Hawkesbury-Nepean component, elevated among the inner southern Sydney distribution zones.
Mascot's elevated hardness reflects the proportionally significant Hawkesbury-Nepean component in the inner southern Bayside NSW Prospect distribution blend. The Hawkesbury-Nepean system traverses Cumberland Plain alluvial terrain and Triassic carbonate-cemented sedimentary deposits — dissolving substantial calcium bicarbonate before Prospect treatment. The Mascot Bayside NSW inner southern distribution sub-zone at 161 mg/L and TDS 358.6 mg/L receives a notably elevated Hawkesbury-Nepean fraction within the inner southern Sydney network, consistent with the adjacent Kogarah (165.5 mg/L) sub-zone in the southern inner corridor.
Mascot residents face moderate to heavy limescale build-up on taps, shower screens, and in kettles — descaling every three to four weeks is typical. Hot water systems benefit from annual inspection. The elevated lead reading (0.004 mg/L) warrants briefly running the cold tap before use in older Mascot residential buildings adjacent to the airport precinct. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. A point-of-use water filter is a practical investment for Mascot's growing apartment residential community in this inner southern Sydney airport corridor.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant with a significant Hawkesbury-Nepean component distributed through the inner southern Bayside Sydney supply network — the Mascot Bayside NSW LGA supply carries moderately hard water at 161 mg/L with elevated TDS of 358.6 mg/L, reflecting the elevated Hawkesbury-Nepean proportion in the Bayside inner southern Sydney distribution corridor.