Two ways to find local utility companies are by checking on the website of your city government or by looking for local branches of national or regional utility companies such as Atmos Energy. Such companies often have branch location pages on their websites for locating local utility providers.
For example, the City of St. Louis, Missouri has a utilities page on its official website. The page has links to information on the Public Utilities Department and the Water Division. Clicking on these links pulls up each department's contact information and address, as well as links to their external websites, when applicable. The St. Louis website also has links to external utility websites, such as those of Veolia Thermal Energy, Laclede Gas and the Metropolitan St. Louis Sewer District. You can find similar information on other city websites, such as that of Chicago.
Atmos Energy has a webpage to locate an authorized gas dealer near you. As of 2015, the company operates in eight states, and the website has an interactive map that enables you to click on your state to locate gas services in your area. Eversource provides electric services in the northeast United States, and you can enter your ZIP code on the company's website to sign up for service in your area.