Harrington Park Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.6
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
201.7 mg/L
Est. Daily Cost
A$0.32
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 Harrington Park, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Harrington Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.2 yrs | 8.5 yrs | -27% |
| Washing Machine | 9.8 yrs | 12 yrs | -18% |
| Water Heater | 11.5 yrs | 15 yrs | -23% |
Regional Water Comparison
How Harrington Park compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Harrington Park, New South Wales | 102.5 mg/L | 🟡 Moderately Hard | reservoir |
| Mount Annan, New South Wales | 198 mg/L | 🔴 Very Hard | reservoir |
| Campbelltown, New South Wales | 61 mg/L | 🟡 Moderately Hard | reservoir |
| Minto, New South Wales | 89 mg/L | 🟡 Moderately Hard | reservoir |
| Ingleburn, New South Wales | 93.5 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How Harrington Park compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Harrington Park | 102.5 mg/L | 🟡 Low |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Harrington Park's Water Unique?
Local geology and source profile
Harrington Park's drinking water is supplied by Sydney Water, treated at the Prospect Water Filtration Plant with a moderate Hawkesbury-Nepean component for the Camden Council LGA outer south-western Sydney distribution in New South Wales. Water hardness in Harrington Park is measured at 102.5 mg/L — classified as slightly hard — within the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Harrington Park — a large master-planned residential estate community in the outer south-western Sydney Camden Council LGA adjacent to Narellan and Camden town, known for the Harrington Park estate's planned lakes and parklands network, the Camden Valley Way commercial corridor, and the rapidly growing south-western Sydney Camden growth corridor community — receives slightly elevated supply reflecting a moderate Hawkesbury-Nepean proportion at the outer south-western Camden Prospect distribution sub-zone.
Harrington Park's slightly elevated hardness reflects a moderate Hawkesbury-Nepean component in the outer south-western Camden Prospect distribution blend. The Hawkesbury-Nepean system traverses the Camden–Narellan plain alluvial valley and Triassic carbonate-cemented Hawkesbury Sandstone formations — contributing moderate dissolved calcium before Prospect treatment. At 102.5 mg/L and TDS 201.7 mg/L, Harrington Park's outer south-western Camden supply reflects the slightly elevated Hawkesbury-Nepean proportion at this growth corridor sub-zone, softer than the harder outer south-western Liverpool City sub-zones (Hinchinbrook 198.5 mg/L) in the adjacent LGA.
Harrington Park residents can expect moderate limescale on taps and in kettles — descaling every two to three months is typically adequate. Hot water systems benefit from periodic inspection. The low lead reading (0.003 mg/L) is good. Sydney Water provides water quality information at sydneywater.com.au, with all ADWG health standards consistently met. Harrington Park's outer south-western Sydney growth estate community and the Camden Valley Way corridor benefit from a safe supply meeting all ADWG standards.
Geology & Source: Supplied by Sydney Water via the Prospect Water Filtration Plant with a moderate Hawkesbury-Nepean component — the Harrington Park Camden outer south-western Sydney supply carries slightly hard water at 102.5 mg/L with TDS of 201.7 mg/L, reflecting a moderate Hawkesbury-Nepean proportion in the outer south-western Camden LGA Harrington Park Prospect distribution sub-zone.