When can you classify a water is clean?

Water can be classified as clean when it is free from harmful contaminants, including pathogens, chemicals, and excessive levels of minerals. It should meet established safety standards for drinking, which typically include specific limits for bacteria, heavy metals, and pollutants set by health organizations. Additionally, clean water should be clear, odorless, and tasteless, indicating the absence of impurities. Regular testing and monitoring are essential to ensure water quality remains safe for consumption.