How deep must wells be drilled in order to collect water?

Water dowsing (searching for water with a forked stick for example) is a con pantomine. Water is almost abundantly available over all of the earth's surface. Rainfall or precipitation of some sort occurs most everywhere on the earth's surface. After rain hits the ground it starts a possible deep journey to a level which can be mapped in surface area that represents an underground reservoir. Many of the large reservoirs have been mapped for the United States since the 1930's, and a resource like a public library should be able to provide this printed information. One way to inexpensively find out how deep water is in a specific area is to ask the surrounding land owners. If you live in a mountainous area, take heart for good water can be found at various levels relatively near grade. Drilling to depths of around 300 feet is somewhat normal. Water can be found at several levels in one drill site. States have most of the legal requirements of underground water sources. Once water is available in adequate supply, a landowner should have it checked for how suitable it is for its intended purpose.