Groundwater is one of our most valuable resources—even though you probably never see it or even realize it is there. There is water somewhere beneath your feet no matter where on Earth you live. Groundwater starts as precipitation, just as surface water does, and once water penetrates the ground, it continues moving, sometimes quickly and sometimes very slowly. Eventually groundwater emerges
All Groundwater Science Topics
View a list of all of our science topics about groundwater.
Groundwater and the water cycle
Large amounts of water are stored in the ground. The water is still moving, possibly very slowly, and it is a part of the water cycle.