Rooty Hill Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
8.1
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
435.1 mg/L
Est. Daily Cost
A$0.59
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 Rooty Hill, your appliances are currently losing 25% efficiency due to mineral buildup.
| Appliance | In Rooty Hill | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.5 yrs | 8.5 yrs | -59% |
| Washing Machine | 6.7 yrs | 12 yrs | -44% |
| Water Heater | 8.2 yrs | 15 yrs | -45% |
Regional Water Comparison
How Rooty Hill compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Rooty Hill, New South Wales | 186 mg/L | 🔴 Very Hard | reservoir |
| Mount Druitt, New South Wales | 30.5 mg/L | 🟢 Soft | reservoir |
| Doonside, New South Wales | 140 mg/L | 🟠 Hard | reservoir |
| St Clair, New South Wales | 26.5 mg/L | 🟢 Soft | reservoir |
| Quakers Hill, New South Wales | 88 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How Rooty Hill compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rooty Hill | 186 mg/L | 🔴 High |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Rooty Hill's Water Unique?
Local geology and source profile
Rooty Hill's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant with a dominant Hawkesbury-Nepean component for the Blacktown LGA outer western Sydney distribution in New South Wales. Water hardness in Rooty Hill is measured at 186 mg/L — classified as hard, approaching the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Rooty Hill — a large outer western Blacktown LGA suburb known for the Rooty Hill RSL club and entertainment complex, the Rooty Hill Station transport hub, and residential estates on the western edge of Sydney's metropolitan growth boundary — carries the hardest supply in the Blacktown LGA, in stark contrast to the soft Mount Druitt (30.5 mg/L) just to the south in the same LGA, demonstrating a dramatic north-south hardness gradient across the Blacktown supply network.
Rooty Hill's very elevated hardness reflects the dominant Hawkesbury-Nepean component in the outer western Blacktown Prospect distribution blend near the Nepean River corridor. The Hawkesbury-Nepean system at this outer western Sydney location traverses extensive Triassic carbonate-cemented Cumberland Plain alluvial and Hawkesbury River Triassic sandstone transition zones — dissolving very substantial calcium bicarbonate. The Rooty Hill outer western Blacktown distribution sub-zone at 186 mg/L and TDS 435.1 mg/L is adjacent to the maximum Hawkesbury-Nepean influenced outer western Penrith supply zones, receiving the highest Nepean River component in the Blacktown LGA.
Rooty Hill residents face significant daily limescale challenges — kettle descaling every two to three weeks is typical, shower screens accumulate substantial carbonate deposits, and hot water system elements require regular inspection. The elevated lead reading (0.005 mg/L) warrants always briefly running the cold tap before drinking. 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 worthwhile investment for the Rooty Hill community and the busy RSL Club and hospitality precinct in this outer western Sydney corridor.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant with a dominant Hawkesbury-Nepean component — the Rooty Hill Blacktown LGA outer western Sydney supply carries hard water at 186 mg/L with elevated TDS of 435.1 mg/L, the hardest recorded in the Blacktown LGA, reflecting the very high Hawkesbury-Nepean proportion at this outer western Blacktown distribution sub-zone near the Nepean River corridor.