If you want to help keep our waters clean, there are many things you can do to help. You can prevent water pollution of nearby rivers and lakes as well as groundwater and drinking water by following some simple guidelines in your everyday life. 1  Conserve water by turning off the tap when running water is not necessary.ou can prevent water pollution of nearby rivers and lakes as well as groundwater and drinking water by following some simple guidelines in your everyday life. 1  Conserve water by turning off the tap when running water is not necessary.