Water purification describes a process during which contaminants such as organic material, pathogens or chemical substances are removed from raw water. Water purification can either denominate the process of making water safe for human consumption, but the term is also used for other cleansing processes to make water suitable for e.g. industrial or agricultural uses. Water purification includes physical processes such as filtration or sedimentation, or chemical processes such as chlorination or use of sunlight which contains ultraviolet light.
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