Guidelines for Canadian Drinking Water Quality: Guideline Technical Document – Zinc (French, HTML)

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Publisher-reported update

2021-11-30

The aesthetic objective for zinc is ≤5.0 mg/L. Zinc is an essential element and is generally considered to be non-toxic. Intake of zinc from food is more than sufficient to satisfy the recommended daily requirements. Drinking water is not regarded as an important nutritional source of this element. Water containing zinc at concentrations above 5.0 mg/L tends to be opalescent, develops a greasy film when boiled, and has an undesirable astringent taste.

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