Columbia Gas

Columbia Gas is an affiliate of Indiana-based NiSource, Inc., a large gas utility with operations extending to areas of the Midwest as well as its Maryland service territory. Columbia Gas serves approximately 34,000 customers in a service territory within the Western Maryland counties of Washington, Allegany, and Garrett.

Columbia’s last rate case was in 2023. The final PSC ruling was issued on October 26, 2023. You can access the case here.  

Current rates

Gas bills include two primary categories of charges: distribution charges and supply charges. These categories of charges and additional charges are explained here. The distribution rate covers most of the average customer's distribution costs. For the average Columbia Gas customer in 2024, the volumetric rate makes up 82 percent of distribution costs.

Volumetric distribution rate: $1.00385/therm

Customer charge: $16.25/month

Supply cost: $0.3309/therm  (June 2024)













Watch a previously recorded webinar on how to read your Columbia Gas bill.