Werribee Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.2
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
46.4 mg/L
Est. Daily Cost
A$0.08
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 Werribee, your appliances are currently losing 4% efficiency due to mineral buildup.
| Appliance | In Werribee | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.7 yrs | 8.5 yrs | — |
| Washing Machine | 12.6 yrs | 12 yrs | — |
| Water Heater | 14.5 yrs | 15 yrs | -3% |
Regional Water Comparison
How Werribee compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Werribee, Victoria | 26.5 mg/L | 🟢 Soft | reservoir |
| Hoppers Crossing, Victoria | 41.5 mg/L | 🟢 Soft | reservoir |
| Wyndham Vale, Victoria | 68.5 mg/L | 🟡 Moderately Hard | reservoir |
| Tarneit, Victoria | 56.5 mg/L | 🟢 Soft | reservoir |
| Point Cook, Victoria | 70 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How Werribee compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Werribee | 26.5 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Werribee's Water Unique?
Local geology and source profile
Werribee's drinking water is supplied by City West Water as water retailer, with bulk supply from Melbourne Water drawn from the Thomson Reservoir and Upper Yarra Reservoir catchments in the protected Yarra Ranges, Victoria. Water hardness in Werribee is measured at 26.5 mg/L — classified as very soft — far below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Werribee, in the Wyndham LGA adjacent to the Werribee Treatment Complex, receives supply from Melbourne Water's integrated reservoir system through the western metropolitan distribution network.
Werribee's very soft water traces directly to Melbourne Water's protected Yarra Ranges catchments. The Thomson and Upper Yarra storages collect runoff draining across Devonian granite and metamorphic rhyodacite — among the most chemically resistant igneous formations — which contribute negligible dissolved calcium or magnesium. The 26.5 mg/L hardness at Werribee is remarkably low for an outer suburban location, suggesting a particularly direct or efficient supply pathway from the Yarra Ranges storage system to this part of the south-west distribution network.
Werribee residents experience virtually no limescale accumulation — taps, kettles, and shower screens rarely require descaling. Hot water systems maintain near-peak efficiency throughout their service life with minimal maintenance. At such low hardness and TDS, some residents use a small mineralising filter for improved drinking water taste. City West Water provides water quality information at citywestwater.com.au, with all ADWG health standards met throughout the Werribee supply zone. Soap and cleaning products lather extremely well in Werribee's soft water.
Geology & Source: Supplied by City West Water (water retailer) and Melbourne Water (wholesale) from the Thomson Reservoir and Upper Yarra catchment systems via the western Melbourne distribution network — the Werribee outer south-west supply carries very soft water at 26.5 mg/L, among the softest of any outer Melbourne suburb, reflecting near-source Yarra Ranges supply characteristics.