Aluminium
A metal that can enter treated water from aluminium-based coagulants used in water treatment.
ADWG Guideline
0.2 mg/L
Aluminium in drinking water primarily comes from aluminium sulfate (alum), a coagulant widely used in water treatment to remove turbidity and colour. Small amounts of residual aluminium may remain in the treated water.
Why it matters
The ADWG sets a guideline of 0.2 mg/L:
- Primarily an aesthetic guideline — high aluminium can cause turbidity after treatment
- The health significance of aluminium in drinking water at typical concentrations remains inconclusive
- Occasional media claims linking aluminium to Alzheimer’s disease are not supported by current scientific evidence at drinking water levels
Typical values
Well-operated treatment plants typically achieve aluminium levels of 0.05–0.1 mg/L. Levels above 0.2 mg/L usually indicate a treatment process issue.
Check Your Water
See how aluminium 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.