Aluminum (water treatment)
Water-treatment flocculant
Evidence level : Emerging / debated Drinking waterMechanism : Environmental / physical burden
🟠 Some signals exist (animal studies, small human studies) but results are conflicting and the scientific community is still debating them.
- Where it's found
- Aluminum salts used as a flocculant at treatment plants, with possible leakage if dosing is poorly controlled.
- Suspected mechanism
- The regulatory limit (0.2 mg/L) reflects treatment quality rather than a demonstrated health risk; drinking water accounts for less than 5% of daily aluminum intake.
- Suggested alternative
- No individual action needed: the issue is monitored by health authorities.
- Source
- ANSES; Health Canada.
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Content last updated: September 14, 2026