Croydon 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
89.6 mg/L
Est. Daily Cost
A$0.16
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 Croydon, your appliances are currently losing 7% efficiency due to mineral buildup.
| Appliance | In Croydon | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.9 yrs | 8.5 yrs | -7% |
| Washing Machine | 11.7 yrs | 12 yrs | -3% |
| Water Heater | 13.5 yrs | 15 yrs | -10% |
Regional Water Comparison
How Croydon compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Croydon, New South Wales | 51.5 mg/L | 🟢 Soft | reservoir |
| Ashfield, New South Wales | 48.5 mg/L | 🟢 Soft | reservoir |
| Burwood, New South Wales | 89.5 mg/L | 🟡 Moderately Hard | reservoir |
| Dulwich Hill, New South Wales | 172.5 mg/L | 🟠 Hard | reservoir |
| Campsie, New South Wales | 147 mg/L | 🟠 Hard | reservoir |
National Benchmark
How Croydon compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Croydon | 51.5 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
Bring Boronia-quality water to your Croydon home
Shop water softeners on Amazon.com →
What Makes Croydon's Water Unique?
Local geology and source profile
Croydon'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 Inner West LGA inner western Sydney distribution in New South Wales. Water hardness in Croydon is measured at 51.5 mg/L — classified as soft — well below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Croydon — a heritage inner western Sydney suburb in the Inner West LGA adjacent to Ashfield, Burwood, and Leichhardt, known for the Croydon Uniting Church heritage precinct, the Croydon residential character of the Victorian-era Federation and Edwardian homes on the Parramatta Road corridor, the Five Dock Park and Croydon Park community, and the established inner western Sydney residential and multicultural community — receives soft supply consistent with the predominantly Warragamba-dominant character of the inner western Inner West LGA Prospect distribution.
Croydon's soft supply reflects a predominantly Warragamba Dam contribution with minimal Hawkesbury-Nepean blending at the inner western Inner West Prospect distribution sub-zone. Warragamba Dam collects rainfall from the Blue Mountains sandstone plateau and Kanangra–Boyd granite uplands — chemically resistant terrain contributing negligible dissolved minerals. At 51.5 mg/L and TDS 89.6 mg/L, Croydon's inner western Sydney supply is consistent with the soft character of the Inner West LGA distribution (Camperdown 59.5 mg/L, Glebe 103 mg/L), reflecting the predominantly Warragamba-dominant supply routing through the inner western Sydney network.
Croydon residents enjoy low limescale accumulation on taps and in kettles — descaling every two to three months is typically adequate. Hot water systems accumulate minimal scale. The 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. Croydon's inner western Sydney heritage residential community benefits from this soft supply meeting all ADWG standards.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant drawing predominantly from Warragamba Dam — the Croydon Inner West inner western Sydney supply carries soft water at 51.5 mg/L with low TDS of 89.6 mg/L, reflecting the predominantly Warragamba-dominant supply with minimal Hawkesbury-Nepean component at the inner western Inner West LGA Croydon Prospect distribution sub-zone, consistent with adjacent inner western Sydney soft sub-zones.