Prospect Water Hardness & Quality Report (2026)
Water Hardness
Source
mixed
pH Level
8.4
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
792.1 mg/L
Est. Daily Cost
A$0.90
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 Prospect, your appliances are currently losing 38% efficiency due to mineral buildup.
| Appliance | In Prospect | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3.1 yrs | 12 yrs | -74% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Prospect compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Prospect, South Australia | 284 mg/L | 🔴 Very Hard | mixed |
| Adelaide, South Australia | 155 mg/L | 🟠 Hard | mixed |
| Adelaide city centre, South Australia | 180.5 mg/L | 🔴 Very Hard | mixed |
| Mawson Lakes, South Australia | 109 mg/L | 🟡 Moderately Hard | mixed |
| Seaton, South Australia | 169 mg/L | 🟠 Hard | mixed |
National Benchmark
How Prospect compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Prospect | 284 mg/L | 🔴 High |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
Bring Boronia-quality water to your Prospect home
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What Makes Prospect's Water Unique?
Local geology and source profile
Prospect's drinking water is supplied by SA Water, drawing from a mixed blend of River Murray transfer, Mount Lofty Ranges reservoir supply (Happy Valley, Myponga, Millbrook Reservoirs), and Northern Adelaide Plains groundwater for the City of Prospect LGA inner northern Adelaide distribution in South Australia. Water hardness in Prospect is measured at 284 mg/L — classified as very hard, substantially exceeding the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Prospect — an established inner northern Adelaide LGA suburb known for the Prospect Road boutique shopping and café strip, the Prospect Council Civic Centre, and the heritage character of this late-19th century residential municipality adjacent to the Adelaide CBD — carries one of the hardest supplies of any inner metropolitan Australian suburb, reflecting SA Water's highly mineralised metropolitan supply blend.
Prospect's elevated hardness reflects SA Water's River Murray transfer component, which at the Morgan intake accumulates calcium, magnesium, sodium, and sulphate from the Cambrian–Ordovician outback catchment across South Australia. The blended supply also incorporates Mount Lofty Ranges reservoir runoff traversing Cambrian limestone and dolomite formations of the Para–Gawler catchment, and seasonally elevated Northern Adelaide Plains groundwater contributions. The combined effect delivers 284 mg/L and TDS 792.1 mg/L to the Prospect inner northern Adelaide distribution, making this one of the hardest inner-city supplies in Australia.
Prospect residents face severe daily limescale challenges — kettle descaling weekly is standard, shower screens accumulate heavy carbonate deposits rapidly, and hot water system elements need annual professional inspection. The elevated lead reading (0.004 mg/L) warrants briefly running the cold tap before use in Prospect's heritage Edwardian and Victorian homes along the Prospect Road precinct. SA Water provides water quality information at sawater.com.au, with all ADWG health standards consistently met. A whole-house water softener is a practical investment for the Prospect community.
Geology & Source: Supplied by SA Water from a mixed source blend of River Murray transfer, Mount Lofty Ranges reservoir supply, and Northern Adelaide Plains groundwater — the Prospect inner northern Adelaide supply carries very hard water at 284 mg/L with extreme TDS of 792.1 mg/L, reflecting SA Water's highly mineralised metropolitan supply blend delivered to the inner northern Adelaide suburbs.