Your water is supplied from two main sources: underground water and surface water. You may not realize it, but your water supply is full of many different particles, some of which are harmful and others which are unpleasant. There are many (probably hundreds) of various contaminants and impurities in water supplies. Some are a result of natural occurrence and others are by-products of human activity. Additionally, your local municipalities treat water supplies, adding even more chemicals.
While the added chemicals may kill bacteria and other harmful substances in your water supply, these chemicals create new health problems. You want to filter and purify household water, even after it has been treated by the local departments. Furthermore, water that is treated by municipalities is not guaranteed to be completely pure and free of contaminants. Therefore, filtering and purification systems are a must have for every household.
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