Water that people use and consume on a daily basis comes from one of two major sources: groundwater and surface water. Here, Green Water Technologies provides a brief definition of both types.
Surface water collects in or flows through reservoirs, rivers, lakes, streams and oceans. It remains in place until used by plants for transpiration or abstracted for agriculture, industry and living. Depletion of groundwater and surface water sources for public consumption (residential, commercial or industrial) is sometimes caused by over-pumping.