Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations.- Groundwater
Water supply is the provision of water by public utilities, commercial organisations, community endeavors or by individuals, usually via a system of pumps and pipes.- Water supply
Water supply systems get water from a variety of locations after appropriate treatment, including groundwater (aquifers), surface water (lakes and rivers), and the sea through desalination.- Water supply
Small portions of water occur as groundwater (1.7%), in the glaciers and the ice caps of Antarctica and Greenland (1.7%), and in the air as vapor, clouds (consisting of ice and liquid water suspended in air), and precipitation (0.001%).- Water
Groundwater is an important water resource for the supply of drinking water, especially in arid countries.- Groundwater
Water supply facilities include water wells, cisterns for rainwater harvesting, water supply networks, and water purification facilities, water tanks, water towers, water pipes including old aqueducts.- Water
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Water resources are natural resources of water that are potentially useful for humans, for example as a source of drinking water supply or irrigation water.
Natural sources of fresh water include surface water, under river flow, groundwater and frozen water.