Municipal water is widely known as tap water which generally comes from lakes and rivers. The EPA has reported that hundreds of tap water sources fail to meet minimum standards. Simply consider the distance which tap water has to travel before it reaches a consumer’s home, not to mention what that water travels through in this process. Municipal water is actually used as the source for more than 50% of the bottled water sold in the United States. Municipal water may be "purified" (please see the "Purification Process" section). With water, the word pure is often used for treated water, rather than for water that is pure by nature.
Well water is defined as bottled water from a hole bored, drilled or otherwise constructed in the ground, which taps the water aquifer. Many people depend on wells for their water supply, especially in the more rural areas. Underground water is usually clean, because soil is a good filter, and the water generally contains dissolved minerals. When a well is drilled, it should be drilled through the first layer of bedrock in order to protect the water source.
Spring water is defined as bottled water derived from an underground formation from which water flows naturally to the surface of the earth. Spring water is the natural overflow or point of escape from an underground reservoir of water. Natural spring water is individual, as unique as the land formations that it passes through.