Marble Bar
North West Region · Western Australia · Reporting period 2023-2024
The verdict
Marble Bar's water is much closer to neutral pH and clearer — though it runs much saltier and harder than most of its 17 neighbours.
At a glance
Position within the North West Region
Purity
By-products & nitrate
Less pure than 73% of North West Region supplies
Clarity
Turbidity, colour, metals
Clearer than 75% of North West Region supplies
Taste
Sodium, chloride, TDS
Saltier than 99% of North West Region supplies
Hardness
Calcium & magnesium
Harder than 78% of North West Region supplies
pH balance
How close to neutral (7.0)
More neutral than 94% of North West Region supplies
Full readings
Typical (mean) value at Marble Bar versus the North West Region average.
Purity & health
| Parameter | Marble Bar | Region avg | Unit |
|---|---|---|---|
| Trihalomethanes (THMs) | 0.00 | 0.02 | mg/L |
| Nitrate | 7.0 | 5.8 | mg/L |
Clarity & appearance
| Parameter | Marble Bar | Region avg | Unit |
|---|---|---|---|
| Iron | 0.01 | 0.01 | mg/L |
Taste & saltiness
| Parameter | Marble Bar | Region avg | Unit |
|---|---|---|---|
| SodiumAbove ADWG | 190 | 66.3 | mg/L |
| Chloride | 193 | 88.9 | mg/L |
| Total Dissolved Solids (TDS)Above ADWG | 1054 | 511 | mg/L |
| Sulphate | 60.0 | 29.6 | mg/L |
Hardness & scale
| Parameter | Marble Bar | Region avg | Unit |
|---|---|---|---|
| HardnessAbove ADWG | 295 | 171 | mg/L |
| Alkalinity | 385 | 179 | mg/L |
| Silica | 39.0 | 42.6 | mg/L |
pH balance
| Parameter | Marble Bar | Region avg | Unit |
|---|---|---|---|
| pH | 7.5 | 7.8 | pH units |
Compare nearby
All of North West Region →Data & methodology
Data source: Water Corporation of WA Drinking Water Quality Annual Report 2023-2024.
Regional ranking: Each measured parameter is ranked against every other locality in the North West Region using the typical (mean) reading. Lower readings rank better, except pH where the score is distance from neutral (7).
ADWG safety check: Every reading is independently checked against the NHMRC Australian Drinking Water Guidelines; any value above the limit is flagged regardless of how it compares to neighbours.