Cowaramup
South West Region · Western Australia · Reporting period 2023-2024
The verdict
Cowaramup's water is much closer to neutral pH and softer — though it runs much less pure than most of its 34 neighbours.
At a glance
Position within the South West Region
Purity
By-products & nitrate
Less pure than 93% of South West Region supplies
Clarity
Turbidity, colour, metals
About average for the South West Region
Taste
Sodium, chloride, TDS
About average for the South West Region
Hardness
Calcium & magnesium
Softer than 69% of South West Region supplies
pH balance
How close to neutral (7.0)
More neutral than 97% of South West Region supplies
Full readings
Typical (mean) value at Cowaramup versus the South West Region average.
Purity & health
| Parameter | Cowaramup | Region avg | Unit |
|---|---|---|---|
| Trihalomethanes (THMs) | 0.11 | 0.05 | mg/L |
Clarity & appearance
| Parameter | Cowaramup | Region avg | Unit |
|---|---|---|---|
| Turbidity | 0.50 | 0.45 | NTU |
| True colour | 2.0 | 2.0 | TCU |
| Aluminium | 0.01 | 0.02 | mg/L |
| Iron | 0.12 | 0.05 | mg/L |
| Manganese | 0.01 | 0.01 | mg/L |
Taste & saltiness
| Parameter | Cowaramup | Region avg | Unit |
|---|---|---|---|
| Sodium | 51.0 | 58.5 | mg/L |
| Chloride | 92.0 | 98.2 | mg/L |
| Total Dissolved Solids (TDS) | 253 | 324 | mg/L |
| Sulphate | 12.0 | 16.9 | mg/L |
Hardness & scale
| Parameter | Cowaramup | Region avg | Unit |
|---|---|---|---|
| Hardness | 41.0 | 83.9 | mg/L |
| Alkalinity | 46.0 | 81.8 | mg/L |
| Silica | 8.0 | 11.0 | mg/L |
pH balance
| Parameter | Cowaramup | Region avg | Unit |
|---|---|---|---|
| pH | 7.5 | 7.7 | pH units |
Compare nearby
All of South West Region →Suburbs near Cowaramup
These suburbs aren't individually tested — Cowaramup is their closest monitored supply point.
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 South 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.