Groundwater: Introduction
For millions of people worldwide, water does not come from a tap you just turn on over the kitchen sink. Instead, it comes from a well, like this one. But where does the water in the bottom of the well come from? It comes from water-holding rock layers buried beneath the surface. This constantly flowing body of subsurface water is part of Earth’s water cycle and is an important natural resource.
In this section you will learn more about how water flows underground to supply drinking water to cities and villages all over the world.
