Our Companies

As a premier regulated utility company, the services we provide are vital to millions of residential customers, businesses and industries as well as thousands of communities and organizations depending on reliable, affordable energy as a fundamental building block of community, economic vitality and growth.


NiSource’s Natural Gas Operations

Our natural gas utilities provide reliable, domestically produced supplies of natural gas to approximately 3.4 million residential, commercial and industrial customers via nearly 60,000 miles of pipeline and related facilities in seven states: Indiana, Kentucky, Maryland, Massachusetts, Ohio, Pennsylvania, Virginia.


NiSource’s Electric Operations

In addition to serving approximately 800,000 gas customers in northern Indiana, we also provide reliable and affordable electric energy to nearly 500,000 customers in northern Indiana. Our electric operations include power generation, transmission and local distribution, as well as wholesale and electric transmission transactions. Our electric supply portfolio includes both traditional and renewable generation sources, including natural gas, hydroelectric, wind, and coal generated supplies, providing a total system operating net capability of more than 3,000 megawatts.

NiSource’s Local Utilities:

Northern Indiana Public Service Co. (NIPSCO)
Columbia Gas of Kentucky
Columbia Gas of Maryland
Columbia Gas of Massachusetts
Columbia Gas of Ohio
Columbia Gas of Pennsylvania
Columbia Gas of Virginia

Additional information about each company can be found in our Company Facts .