Surry Hills Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
281 mg/L
Est. Daily Cost
A$0.42
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 Surry Hills, your appliances are currently losing 18% efficiency due to mineral buildup.
| Appliance | In Surry Hills | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.2 yrs | 8.5 yrs | -39% |
| Washing Machine | 8.7 yrs | 12 yrs | -28% |
| Water Heater | 10.3 yrs | 15 yrs | -31% |
Regional Water Comparison
How Surry Hills compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Surry Hills, New South Wales | 133.5 mg/L | 🟠 Hard | reservoir |
| Darlinghurst, New South Wales | 197 mg/L | 🔴 Very Hard | reservoir |
| Redfern, New South Wales | 60 mg/L | 🟡 Moderately Hard | reservoir |
| Sydney, New South Wales | 50 mg/L | 🟢 Soft | reservoir |
| Paddington, New South Wales | 174 mg/L | 🟠 Hard | reservoir |
National Benchmark
How Surry Hills compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Surry Hills | 133.5 mg/L | 🟠 Moderate |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Surry Hills's Water Unique?
Local geology and source profile
Surry Hills' drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant with a significant Hawkesbury-Nepean component for the City of Sydney LGA inner eastern distribution in New South Wales. Water hardness in Surry Hills is measured at 133.5 mg/L — classified as moderately hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Surry Hills — one of Sydney's most fashionable inner-city creative precincts, known for its café-lined Crown Street and Foveaux Street, the Surry Hills Library, the Brett Whiteley Studio, and its transformation from industrial working-class suburb to a hub of design, media, and hospitality industries — carries supply harder than the standard inner eastern Sydney soft zones, representing a notable supply blend in this central location.
Surry Hills' elevated hardness reflects a proportionally significant Hawkesbury-Nepean component in the City of Sydney LGA inner distribution blend. The Hawkesbury-Nepean system traverses Cumberland Plain alluvial terrain and Triassic carbonate-cemented sedimentary deposits — dissolving substantial calcium bicarbonate before Prospect treatment. The Surry Hills inner city distribution sub-zone at 133.5 mg/L and TDS 281 mg/L receives a notably elevated Hawkesbury-Nepean fraction compared to softer inner eastern zones, placing the inner city Surry Hills supply in the moderately hard range consistent with the southern and south-western inner Sydney supply corridor.
Surry Hills residents face moderate limescale build-up on taps, shower screens, and in kettles — descaling every three to four weeks is typical. Hot water systems benefit from annual inspection. The elevated lead reading (0.004 mg/L) warrants briefly running the cold tap before use in Surry Hills' extensive stock of Victorian-era terrace homes, converted warehouses, and newer apartment developments. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met throughout the inner city supply zone.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant with a significant Hawkesbury-Nepean component — the Surry Hills City of Sydney LGA inner supply carries moderately hard water at 133.5 mg/L with TDS of 281 mg/L, harder than the standard inner eastern Sydney zones, reflecting an elevated Hawkesbury-Nepean proportion distributed to this inner city Sydney supply sub-zone.