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 2025. The final PSC ruling was issued on April 22, 2025. 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 2026, the volumetric rate makes up 85 percent of distribution costs.

Note: The rates referenced below are base rates which may vary from what you see on your bill because of additional adjustments, such as adjustments made for weather and changes in usage.

  • Volumetric distribution rate: $1.237/therm (October 2026)

  • Customer charge: $16.50/month (October 2026)

  • Supply cost: $0.50972/therm (October 2026)

 

Columbia Gas / Distribution Rate

 
The STRIDE surcharge is not included in this chart. In rate cases, prudently incurred STRIDE costs included in the surcharge are incorporated into utility base rates and reflected in the volumetric and customer charges. Click here for more information about STRIDE.
 
 
 

Columbia Gas / Monthly Customer Charge

 
The STRIDE surcharge is not included in this chart. In rate cases, prudently incurred STRIDE costs included in the surcharge are incorporated into utility base rates and reflected in the volumetric and customer charges. Click here for more information about STRIDE.
 
 
 

Columbia Gas / Total Annual Delivery Charges

Based on 940 therms/year usage
 
 
 

Columbia Gas / Total Annual Bill: Delivery Plus Supply Charges

Based on 940 therms/year usage