Kellyville Ridge 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
100.6 mg/L
Est. Daily Cost
A$0.18
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 Kellyville Ridge, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In Kellyville Ridge | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.7 yrs | 8.5 yrs | -9% |
| Washing Machine | 11.5 yrs | 12 yrs | -4% |
| Water Heater | 13.3 yrs | 15 yrs | -11% |
Regional Water Comparison
How Kellyville Ridge compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Kellyville Ridge, New South Wales | 57 mg/L | 🟢 Soft | reservoir |
| The Ponds, New South Wales | 27 mg/L | 🟢 Soft | reservoir |
| Kellyville, New South Wales | 96 mg/L | 🟡 Moderately Hard | reservoir |
| Glenwood, New South Wales | 124 mg/L | 🟠 Hard | reservoir |
| Quakers Hill, New South Wales | 88 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How Kellyville Ridge compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Kellyville Ridge | 57 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Kellyville Ridge's Water Unique?
Local geology and source profile
Kellyville Ridge'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 City Council LGA outer north-western Sydney Hills distribution in New South Wales. Water hardness in Kellyville Ridge is measured at 57 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Kellyville Ridge — a contemporary master-planned residential estate community in the outer north-western Sydney Hills at the Blacktown–Hills Shire boundary, known for the Kellyville Ridge estate parklands network, the Rouse Hill Town Centre proximity, and the rapidly growing north-western Sydney growth corridor community serviced by the Sydney Metro Northwest — receives slightly elevated supply reflecting minor Hawkesbury-Nepean blending at the outer north-western Blacktown Prospect sub-zone.
Kellyville Ridge's slightly elevated hardness reflects a minor Hawkesbury-Nepean component in the outer north-western Blacktown Prospect distribution blend. Warragamba Dam collects rainfall from the Blue Mountains sandstone plateau and Kanangra–Boyd granite uplands — chemically resistant terrain contributing negligible dissolved minerals — producing predominantly soft supply. The slight elevation from the soft Warragamba base at Kellyville Ridge (57 mg/L, TDS 100.6 mg/L) reflects minimal Hawkesbury-Nepean supplementation at this outer north-western Hills corridor distribution sub-zone.
Kellyville Ridge residents enjoy low limescale accumulation on taps and in kettles — descaling every two to three months is typically sufficient. 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. Kellyville Ridge's outer north-western Sydney Hills growth corridor community benefits from a safe supply meeting all ADWG standards.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam — the Kellyville Ridge Blacktown City outer north-western Sydney Hills supply carries slightly hard water at 57 mg/L with low TDS of 100.6 mg/L, reflecting a predominantly Warragamba-dominant supply with minimal Hawkesbury-Nepean blending at the outer north-western Blacktown LGA Kellyville Ridge Prospect distribution sub-zone.