Port Lincoln 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
825.6 mg/L
Est. Daily Cost
A$0.93
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 Port Lincoln, your appliances are currently losing 39% efficiency due to mineral buildup.
| Appliance | In Port Lincoln | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Port Lincoln compares to its nearest neighbours
| City | Hardness | Risk | Source |
|---|---|---|---|
| ▶ Port Lincoln, South Australia | 293 mg/L | 🔴 Very Hard | mixed |
| Port Pirie, South Australia | 292 mg/L | 🔴 Very Hard | mixed |
| Aldinga Beach, South Australia | 260 mg/L | 🔴 Very Hard | mixed |
| Seaton, South Australia | 169 mg/L | 🟠 Hard | mixed |
| Hallett Cove, South Australia | 186 mg/L | 🔴 Very Hard | mixed |
National Benchmark
How Port Lincoln compares to the Australia average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Port Lincoln | 293 mg/L | 🔴 High |
| Australia National Avg | 125 mg/L | 🟠 Moderate |
| Boronia Top Rated | 5 mg/L | 🟢 None |
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What Makes Port Lincoln's Water Unique?
Local geology and source profile
Port Lincoln's drinking water is supplied by SA Water, drawing from the Uley South Basin — a major Gambier Limestone aquifer system on the lower Eyre Peninsula — for the City of Port Lincoln LGA at the southern tip of the Eyre Peninsula on Spencer Gulf in South Australia. Water hardness in Port Lincoln is measured at 293 mg/L — classified as very hard, substantially exceeding the Australian Drinking Water Guidelines (ADWG) aesthetic guideline of 200 mg/L published by NHMRC. Port Lincoln — South Australia's largest regional city by area, the 'Seafood Capital of Australia', known for the iconic Boston Bay tuna aquaculture industry, Southern Ocean seafood, the Lincoln National Park, and the gateway to the Coffin Bay oyster coast — carries very hard supply from the Eyre Peninsula's distinctive Gambier Limestone groundwater system.
Port Lincoln's elevated hardness reflects the calcium carbonate dissolution from the Tertiary Gambier Limestone karst aquifer of the Uley South Basin. The Gambier Limestone (Eocene–Oligocene) underlies much of the lower Eyre Peninsula — a porous, fractured carbonate formation where rainwater recharge readily dissolves calcium and magnesium bicarbonate to produce the characteristically hard, mineral-rich supply. The Uley South Basin is one of SA Water's key groundwater resources for the Eyre Peninsula coastal communities. Port Lincoln's 293 mg/L and extreme TDS 825.6 mg/L confirms the intensely carbonate-mineralised character of this Eyre Peninsula limestone aquifer supply.
Port Lincoln residents face severe daily limescale challenges — kettle descaling weekly is standard, shower screens and tapware accumulate heavy carbonate deposits, 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. SA Water provides water quality information at sawater.com.au, with all ADWG health standards consistently met. A point-of-use water filter is a near-necessity for Port Lincoln's residential and aquaculture industry community on Spencer Gulf's Eyre Peninsula coast.
Geology & Source: Supplied by SA Water from the Uley South Basin — a significant Gambier Limestone aquifer on the lower Eyre Peninsula — the Port Lincoln Eyre Peninsula supply carries very hard water at 293 mg/L with extreme TDS of 825.6 mg/L, reflecting the calcium carbonate dissolution from the Tertiary Gambier Limestone karst aquifer system that provides the primary groundwater supply for the Eyre Peninsula coastal cities.