Mount Druitt Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.1
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
50.3 mg/L
Est. Daily Cost
A$0.10
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 Mount Druitt, your appliances are currently losing 4% efficiency due to mineral buildup.
| Appliance | In Mount Druitt | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.6 yrs | 8.5 yrs | — |
| Washing Machine | 12.5 yrs | 12 yrs | — |
| Water Heater | 14.4 yrs | 15 yrs | -4% |
Regional Water Comparison
How Mount Druitt compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Mount Druitt, New South Wales | 30.5 mg/L | 🟢 Soft | reservoir |
| Rooty Hill, New South Wales | 186 mg/L | 🔴 Very Hard | reservoir |
| St Clair, New South Wales | 26.5 mg/L | 🟢 Soft | reservoir |
| Doonside, New South Wales | 140 mg/L | 🟠 Hard | reservoir |
| Quakers Hill, New South Wales | 88 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How Mount Druitt compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Mount Druitt | 30.5 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Mount Druitt's Water Unique?
Local geology and source profile
Mount Druitt'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 Blacktown LGA far outer western Sydney distribution in New South Wales. Water hardness in Mount Druitt is measured at 30.5 mg/L — classified as soft — far below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Mount Druitt — a major outer western Sydney residential and community hub with the Mount Druitt Town Centre, the Mount Druitt Hospital, and strong multicultural community character — benefits from a predominantly soft supply reflecting Warragamba-dominant blending, notably softer than the adjacent Seven Hills sub-zone (94.5 mg/L) in the same Blacktown LGA, demonstrating the marked supply blend variation across the Blacktown LGA distribution network.
Mount Druitt's soft supply reflects the predominant Warragamba Dam contribution at this far outer western Sydney Blacktown Prospect distribution sub-zone, with minimal Hawkesbury-Nepean blending. Warragamba Dam collects rainfall from the Blue Mountains sandstone plateau and Kanangra–Boyd granite uplands — chemically resistant terrain contributing negligible dissolved minerals. The Mount Druitt outer western Blacktown distribution node at 30.5 mg/L and TDS 50.3 mg/L receives a proportionally higher Warragamba fraction than the northern Blacktown distribution sub-zones, placing Mount Druitt among the softer outer western Sydney supply zones.
Mount Druitt residents enjoy very low limescale accumulation on taps, in kettles, and around shower fittings — descaling every two to three months is typically adequate. Hot water systems accumulate minimal scale. The very low lead reading (0.001 mg/L) confirms excellent supply quality. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. The soft supply is a practical everyday benefit for Mount Druitt's diverse western Sydney residential community across the major housing precincts along Carlisle Avenue and the Rooty Hill corridor.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam on the Nepean River system — the Mount Druitt Blacktown LGA outer western Sydney supply carries soft water at 30.5 mg/L with low TDS of 50.3 mg/L, reflecting the predominantly Warragamba Dam dominant supply blend with minimal Hawkesbury-Nepean component at this far outer western Blacktown distribution sub-zone.