Purifying water involved removing both physical impurities (rocks and dirt) and chemical impurities (salts, minerals, toxic chemicals). The two approaches are: distillation (remove and recondense the water) and filtration (using physical devices and chemical filters, including activated carbon, and pH neutralizers. Common tap water filters will remove some organic contaminants, but not all toxic chemicals.---A simple physical purifier can be made from an empty bottle and compressed cloth.1. Cut the plastic bottle in half. Turn the top half upside down and put it inside the bottom half.2. Put the tablecloth in the plastic bottle. This is your filter. ...3. Clean the plastic bottle. Make another batch of dirty water.Try using other different materials as a filter.