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Groundwater
? TBD
Water located beneath the ground surface
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Wikipedia

Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. About 30 percent of all readily available freshwater in the world is groundwater. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water. The depth at which soil...

Subclass of
land waters
Raw water
Followed by
Surface water
Different from
Surface water
spring water
artesian water
Drinking water
non-drinking water
References
Wikidata