groundwater; underground water
Water located beneath the earth's surface in soil pore spaces and in the fractures of rock formations. A common term in environmental and geological contexts.
The groundwater in this area is used as drinking water.
Groundwater contamination has become a serious problem.
In this area, groundwater is pumped up and used for daily life.
The prolonged drought caused the groundwater to dry up.
The factory's wastewater contaminated the groundwater.