About Us

About Us

About Columbia Gas of Maryland

Columbia Gas of Maryland is one of the seven energy-distribution companies of NiSource Inc. (NYSE: NI). NiSource distribution companies serve 3.8 million natural gas and electric customers primarily in seven states.

Communities Served

Columbia Gas of Maryland serves Garrett, Allegany and Washington counties.


We serve more than 33,000 residential, commercial and industrial customers.


Columbia Gas traces its heritage from 1885 and has a long-standing commitment to powering the American experience. We lit the cobbled streets and immigrant dreams of the 1890s, fueled the steel-making blast furnaces of a nation expanding, and powered the American Dream at the dawn of a new century.

Today, our second century of commitment forges ahead, investing in our region's infrastructure to expand, rebuild and install hundreds of miles of state-of-the-art gas lines serving more than 33,000 customers in Garrett, Allegany and Washington counties. And in its wake, new jobs, economic impact, community revitalization, and the assurance of a steady, reliable, safe flow of the energy of the future, natural gas.