Cockatoo Valley vs Williamstown
Side-by-side tap water quality comparison
Which suburb has better water?
It's very close! Cockatoo Valley scores 8.9/10 and Williamstown scores 8.9/10. Both suburbs have similar water quality based on ADWG compliance data.
Visual comparison
Key metrics comparison
Full water quality comparison
All parameters compared against Australian Drinking Water Guidelines (ADWG)
| Parameter | Cockatoo Valley | Williamstown | Unit | ADWG Guideline |
|---|---|---|---|---|
| Alkalinity | 67 Measured | 67 Measured | mg/L | No limit |
| Aluminium | 0.029 Good | 0.029 Good | mg/L | < 0.2 |
| Calcium | 16 Measured | 16 Measured | mg/L | No limit |
| Chloride | 70 Good | 70 Good | mg/L | < 250 |
| Colour | 1 Good | 1 Good | HU | < 15 |
| Copper | 0.0048 Good | 0.0048 Good | mg/L | < 2 |
| E. coli | 0 Compliant | 0 Compliant | cfu/100mL | < 0 |
| Fluoride | 0.7 Good | 0.7 Good | mg/L | < 1.5 |
| Free Chlorine | 0.1 Good | 0.1 Good | mg/L | < 5 |
| Hardness | 82 Good | 82 Good | PPM or mg/L | < 200 |
| Iron | 0.0014 Good | 0.0014 Good | mg/L | < 0.3 |
| Lead | 0.0002 Good | 0.0002 Good | mg/L | < 0.01 |
| Magnesium | 10.21 Measured | 10.21 Measured | mg/L | No limit |
| Manganese | 0.0032 Good | 0.0032 Good | mg/L | < 0.1 |
| Nitrate | 0.7 Good | 0.7 Good | mg/L | < 50 |
| pH | 8.8 Outside range | 8.8 Outside range | pH units | 6.5 – 8.5 |
| Sodium | 59.5 Good | 59.5 Good | mg/L | < 180 |
| Sulfate | 49.5 Good | 49.5 Good | mg/L | < 500 |
| Total Chlorine | 3.7 Good | 3.7 Good | mg/L | < 5 |
| Total Dissolved Solids | 275 Good | 275 Good | mg/L | < 600 |
| Turbidity | 0.1 Good | 0.1 Good | NTU | < 5 |
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Disclaimer: This comparison is for general informational purposes only and does not constitute medical advice or professional guidance. Data is sourced from SA Water. Values shown are based on the most recent published water quality reports and may not reflect real-time conditions at your tap. Water quality can vary due to local plumbing, seasonal changes, and other factors. For specific health concerns, consult a qualified health professional or contact your local water utility. See our Terms of Use.