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水中某些物质可能对人类以外的其他生物有毒,或虽对人体有毒,但通常在水中的浓度不足以威胁人体健康。在关心水中含有危害健康的有毒物质的同时,也应重视饮用水对健康的有益作用。饮用水对健康的益处,主要表现为营养作用和抗毒作用。前者指通过饮用水摄取人体健康必需的常量元素和微量元素,后者指某些常量和微量元素能抑制有毒元素(如汞、铅、镉)的吸收及其毒性效应。
Certain substances in the water may be toxic to humans other than their own, or toxic to humans, but are generally not present in the water in concentrations that pose a threat to human health. In the care of water contains toxic substances that endanger the health, but also should pay attention to the health benefits of drinking water. The health benefits of drinking water, mainly for the role of nutrition and antitoxic effects. The former refers to the constant elements and trace elements necessary for human health through drinking water, and the latter refers to the inhibition of the absorption of toxic elements (such as mercury, lead and cadmium) and their toxic effects by certain macronutrients and trace elements.