Groundwater lies almost everywhere below the earth's surface. In Canada, an average 25% of the water supply comes from groundwater. In addition, groundwater is one of our most important sources of water for irrigation.
Understanding The Basics of Water Wells
A well is an access, a port to the water present in the subsurface. It is in most cases either cased to be in contact with the saturated soil or drilled to intercept fractures where water flows.