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 . Groundwater is recharged from , and eventually flows to , the surface naturally ; natural discharge often occurs at springs and seeps , and can form oases or wetlands . Water . It also occurs in nature as snow , glaciers , ice packs and icebergs , clouds , fog , dew , aquifers , and atmospheric humidity . Approximately 70 % of the freshwater used by humans goes to agriculture .