North Parramatta Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
8
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
385.6 mg/L
Est. Daily Cost
A$0.54
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 North Parramatta, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In North Parramatta | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4 yrs | 8.5 yrs | -53% |
| Washing Machine | 7.3 yrs | 12 yrs | -39% |
| Water Heater | 8.8 yrs | 15 yrs | -41% |
Regional Water Comparison
How North Parramatta compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ North Parramatta, New South Wales | 170 mg/L | 🟠 Hard | reservoir |
| Northmead, New South Wales | 88 mg/L | 🟡 Moderately Hard | reservoir |
| Westmead, New South Wales | 45 mg/L | 🟢 Soft | reservoir |
| Parramatta, New South Wales | 79.5 mg/L | 🟡 Moderately Hard | reservoir |
| Winston Hills, New South Wales | 111.5 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How North Parramatta compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ North Parramatta | 170 mg/L | 🟠 Moderate |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes North Parramatta's Water Unique?
Local geology and source profile
North Parramatta's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant with a very high Hawkesbury-Nepean component for the Parramatta LGA inner western Sydney distribution in New South Wales. Water hardness in North Parramatta is measured at 170 mg/L — classified as moderately hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. North Parramatta — an established suburb north of the Parramatta CBD, adjacent to the historic Parramatta Park and Old Government House World Heritage precinct, known for the Church Street heritage village character, Parramatta Hospital, Western Sydney University (Parramatta City Campus), and the Parramatta Light Rail corridor — carries the hardest supply in the Parramatta LGA, dramatically contrasting with the soft Toongabbie (27.5 mg/L) in the same Parramatta LGA.
North Parramatta's elevated hardness reflects a very high Hawkesbury-Nepean component in the upper Parramatta River supply distribution corridor. The Hawkesbury-Nepean system traverses the Cumberland Plain alluvial terrain and Triassic carbonate-cemented Hawkesbury Sandstone sedimentary deposits — dissolving substantial calcium bicarbonate before Prospect treatment. The North Parramatta inner western Parramatta distribution at 170 mg/L and TDS 385.6 mg/L receives a proportionally very high Hawkesbury-Nepean fraction through its upper Parramatta River distribution routing, with the Parramatta River corridor historically accumulating higher mineral loads than the outer western Prospect mains reaching Toongabbie.
North Parramatta residents face significant daily limescale challenges — kettle descaling every two to three weeks is typical, and shower screens accumulate deposits. Hot water systems benefit from annual inspection. The elevated lead reading (0.004 mg/L) warrants briefly running the cold tap before use in older North Parramatta properties near the heritage precinct. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. A point-of-use water filter is a practical investment for North Parramatta's established inner western Sydney community.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant with a very high Hawkesbury-Nepean component — the North Parramatta Parramatta LGA inner western Sydney supply carries hard water at 170 mg/L with elevated TDS of 385.6 mg/L, the hardest Parramatta LGA sub-zone recorded, in stark contrast to the soft Toongabbie (27.5 mg/L) in the same Parramatta LGA, reflecting the maximum Hawkesbury-Nepean proportion in the upper Parramatta River distribution corridor.