Businesses that provide the public with necessities, such as water, electricity, natural gas, and telephone and telegraph communication.

A public utility is a business that furnishes an everyday necessity to the public at large. Public utilities provide water, electricity, natural gas, telephone service, and other essentials. Utilities may be publicly or privately owned, but most are operated as private businesses.

Typically a public utility has a MONOPOLY on the service it provides. It is more economically efficient to have only one business provide the service because the infrastructure required to produce and deliver a product such as electricity or water is very expensive to build and maintain. A consequence of this monopoly is that federal, state, and local governments regulate public utilities to ensure that they provide a reasonable level of...