Walpole
Great Southern Region · Western Australia · Reporting period 2023-2024
The verdict
Walpole's water is much closer to neutral pH and clearer — though it runs saltier and harder than most of its 58 neighbours.
At a glance
Position within the Great Southern Region
Purity
By-products & nitrate
About average for the Great Southern Region
Clarity
Turbidity, colour, metals
Clearer than 84% of Great Southern Region supplies
Taste
Sodium, chloride, TDS
Saltier than 83% of Great Southern Region supplies
Hardness
Calcium & magnesium
Harder than 81% of Great Southern Region supplies
pH balance
How close to neutral (7.0)
More neutral than 86% of Great Southern Region supplies
Full readings
Typical (mean) value at Walpole versus the Great Southern Region average.
Purity & health
| Parameter | Walpole | Region avg | Unit |
|---|---|---|---|
| Trihalomethanes (THMs) | 0.11 | 0.07 | mg/L |
| Nitrate | 0.88 | 4.8 | mg/L |
Clarity & appearance
| Parameter | Walpole | Region avg | Unit |
|---|---|---|---|
| Iron | 0.02 | 0.10 | mg/L |
Taste & saltiness
| Parameter | Walpole | Region avg | Unit |
|---|---|---|---|
| Sodium | 92.0 | 58.9 | mg/L |
| Chloride | 154 | 111 | mg/L |
| Total Dissolved Solids (TDS) | 447 | 324 | mg/L |
| Sulphate | 31.0 | 16.7 | mg/L |
Hardness & scale
| Parameter | Walpole | Region avg | Unit |
|---|---|---|---|
| HardnessAbove ADWG | 115 | 101 | mg/L |
| Alkalinity | 85.0 | 70.2 | mg/L |
| Silica | 18.9 | 8.3 | mg/L |
pH balance
| Parameter | Walpole | Region avg | Unit |
|---|---|---|---|
| pH | 7.7 | 7.7 | pH units |
Compare nearby
All of Great Southern 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 Great Southern 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.