Carlingford Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.2
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
69.5 mg/L
Est. Daily Cost
A$0.13
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 Carlingford, your appliances are currently losing 5% efficiency due to mineral buildup.
| Appliance | In Carlingford | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.2 yrs | 8.5 yrs | -4% |
| Washing Machine | 12.1 yrs | 12 yrs | — |
| Water Heater | 14 yrs | 15 yrs | -7% |
Regional Water Comparison
How Carlingford compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Carlingford, New South Wales | 41 mg/L | 🟢 Soft | reservoir |
| Ermington, New South Wales | 50.5 mg/L | 🟢 Soft | reservoir |
| Eastwood, New South Wales | 90 mg/L | 🟡 Moderately Hard | reservoir |
| West Ryde, New South Wales | 71 mg/L | 🟡 Moderately Hard | reservoir |
| Epping, New South Wales | 51 mg/L | 🟢 Soft | reservoir |
National Benchmark
How Carlingford compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Carlingford | 41 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Carlingford's Water Unique?
Local geology and source profile
Carlingford's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant blending Warragamba Dam and Hawkesbury-Nepean supply for the Parramatta LGA north-western Sydney distribution in New South Wales. Water hardness in Carlingford is measured at 41 mg/L — classified as soft — well within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Carlingford, in the Parramatta LGA nestled between Epping and Parramatta in north-western Sydney, receives a supply blend at this specific distribution node that is Warragamba-dominant, producing notably softer water than adjacent Hills District suburbs and the harder Ryde LGA zones.
Carlingford's soft supply reflects the predominantly Warragamba Dam component in the local supply blend from the Prospect plant. Warragamba Dam draws from the Blue Mountains catchment draining through Triassic Hawkesbury Sandstone — silica-rich, calcium-poor formations that resist chemical weathering and contribute minimal dissolved minerals. The specific Carlingford distribution node receives a proportionally higher Warragamba fraction than many neighbouring suburbs, producing the 41 mg/L softness — close to the standard Sydney supply average — at the Carlingford tap.
Carlingford residents enjoy low limescale accumulation on taps, in kettles, and around shower fittings — descaling every two to three months is generally adequate. Hot water systems accumulate minimal scale throughout their service life. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. The soft supply is an everyday benefit in Carlingford's established residential community and a welcome contrast to the harder water experienced in some adjacent north-western Sydney LGA zones.
Geology & Source: Supplied by Sydney Water from the Prospect Water Filtration Plant blending Warragamba Dam with a moderate Hawkesbury-Nepean component — the Carlingford Parramatta north-western Sydney distribution carries soft water at 41 mg/L, reflecting a Warragamba-dominant supply blend at this specific inner north-western Sydney distribution node, softer than nearby Hills District and Ryde zones.