Measurement Unit: mg/L
Sodium
A mineral that affects the taste of water and is present naturally or from water treatment processes.
ADWG Guideline
180 mg/L
Sodium is a naturally occurring element found in most water sources. Levels vary depending on geology, proximity to the coast, and water treatment methods.
Why it matters
The ADWG sets an aesthetic guideline of 180 mg/L. At higher levels:
- Water develops a salty taste (noticeable above 200 mg/L for most people)
- People on sodium-restricted diets (e.g., for hypertension) should be aware of water sodium content, though drinking water typically contributes a small fraction of total dietary sodium
Typical values
- Melbourne: 5–15 mg/L (very low, soft water from mountain catchments)
- Sydney: 10–30 mg/L
- Adelaide: 50–150 mg/L (higher due to River Murray source)
- Perth: 50–200 mg/L (varies by supply zone)
Related Terms
Check Your Water
See how sodium levels compare in your suburb with real water quality data.
Disclaimer: Glossary definitions are provided for general educational purposes only and do not constitute medical advice or professional guidance. For specific health concerns about your drinking water, consult a qualified health professional. See our Terms of Use.