In many places, it will be quite necessary to install some kind of  water filter  in a building. Reasons may include the infiltration of water sources by pollutants and contaminants and a high concentration of minerals in a water supply, which could leave water with a very unpleasant taste. If you have decided to install a water filter for your home or business (which you should!) make sure that the model you get is a match for your needs. Some types of filters simply do not clean the water enough or do not have what it takes to take care of certain pathogens.