Water only occurs artificially.
Fresh water is naturally occurring water on Earth 's surface in ice sheets , ice caps , glaciers , icebergs , bogs , ponds , lakes , rivers and streams , and underground as groundwater in aquifers and underground streams . Groundwater ( or ground water ) is the water present beneath Earth 's surface in soil pore spaces and in the fractures of rock formations . Water is a transparent and nearly colorless chemical substance that is the main constituent of Earth 's streams , lakes , and oceans , and the fluids of most living organisms . It also occurs in nature as snow , glaciers , ice packs and icebergs , clouds , fog , dew , aquifers , and atmospheric humidity .