Water delivery systems and companies can be privately owned, government owned or shared, and just under half of all systems in the United States are privately owned, according to United Water. The Environmental Protection Agency regulates public drinking systems, which include private and publicly owned agencies, except for individual household wells.
Public water systems provide the drinking water for 90 percent of Americans, states the EPA. The EPA regulates these water systems, which can be public, private or shared. Other water systems include household and individual wells, which are typically owned by individuals or smaller groups of individuals and are not regulated by the EPA, as these water systems typically are not designed to supply water to more than 25 people.