Dandenong North Water Hardness & Quality Report (2026)
Water Hardness
Source
reservoir
pH Level
7.1
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
30.4 mg/L
Est. Daily Cost
A$0.06
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 Dandenong North, your appliances are currently losing 2% efficiency due to mineral buildup.
| Appliance | In Dandenong North | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 9 yrs | 8.5 yrs | — |
| Washing Machine | 12.9 yrs | 12 yrs | — |
| Water Heater | 14.9 yrs | 15 yrs | -1% |
Regional Water Comparison
How Dandenong North compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Dandenong North, Victoria | 18 mg/L | 🟢 Soft | reservoir |
| Dandenong, Victoria | 7 mg/L | 🟢 Soft | reservoir |
| Noble Park, Victoria | 61.5 mg/L | 🟡 Moderately Hard | reservoir |
| Rowville, Victoria | 99.5 mg/L | 🟡 Moderately Hard | reservoir |
| Keysborough, Victoria | 113.5 mg/L | 🟡 Moderately Hard | reservoir |
National Benchmark
How Dandenong North compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Dandenong North | 18 mg/L | 🟢 None |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Dandenong North's Water Unique?
Local geology and source profile
Dandenong North's drinking water is supplied by South East Water as water retailer, with bulk supply from Melbourne Water drawn from the Thomson Reservoir and Upper Yarra Reservoir catchments in the Yarra Ranges, Victoria. Water hardness in Dandenong North is measured at 18 mg/L — classified as very soft — far below the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Dandenong North, in the Greater Dandenong LGA, shares the eastern supply corridor with Richmond VIC (18 mg/L) and other very soft outer south-east Melbourne communities, confirming a direct Yarra Ranges reservoir supply pathway to the Dandenong North distribution zone.
Dandenong North's very soft supply reflects Melbourne Water's protected Yarra Ranges catchments. The Thomson and Upper Yarra storages collect runoff draining across Devonian granite and metamorphic rhyodacite — ancient igneous terrain contributing virtually no dissolved minerals. The 18 mg/L at Dandenong North and the TDS of 30.4 mg/L confirm near-source supply reaching this outer Greater Dandenong suburb — a striking contrast to adjacent Dandenong (7 mg/L) and Keysborough (113.5 mg/L) in the same LGA, illustrating the remarkable variation in Melbourne's supply blend across adjacent distribution sub-zones.
Dandenong North residents experience very low limescale accumulation — taps, kettles, and shower screens require descaling very rarely. Hot water systems accumulate minimal scale throughout their service life. South East Water provides water quality information at southeastwater.com.au, with all ADWG health standards consistently met. A benchtop carbon filter is popular for improved taste, and the very soft supply benefits the Greater Dandenong community's diverse multicultural residential and commercial precincts including the area's substantial Pacific Islander and South Asian communities.
Geology & Source: Supplied by South East Water (water retailer) and Melbourne Water (wholesale) from the Thomson Reservoir and Upper Yarra Reservoir catchments in the Yarra Ranges — the Dandenong North Greater Dandenong outer south-east supply carries very soft water at 18 mg/L, reflecting the direct eastern Yarra Ranges supply corridor serving the outer Dandenong communities.