Columbia Gas is a natural gas utility company that provides service to residential, commercial, and industrial customers in several states across the United States. It is part of the NiSource family of companies and focuses on delivering safe and reliable natural gas to its customers. The company is involved in the distribution of natural gas, maintaining pipelines, and ensuring compliance with safety regulations. Columbia Gas also offers programs to help customers manage their energy usage and costs, promoting energy efficiency and sustainability in the communities it serves.