Become a Supplier
Start here if you're ready to become a supplier of natural gas services for our customers.
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Maryland
Welcome Suppliers
This website will provide information to natural gas suppliers or those interested in becoming suppliers within our service territory.
Natural gas service rates, regulations and rules can be found in the Tariff.
NOTICE:
During 2028, NiSource anticipates transitioning from the current electric File Transfer Protocol (eFTP) format to the Electronic Data Interchange (EDI) format for certain file types. Even though these changes are not expected to take effect until 2028, there are actions you can take now to be ready. Learn more here.
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Nominations
We’re here to support your nominations activities at any time. If you have questions about nominations, please contact us. All nominations deadlines are listed in EST.
On a limited basis, our program allows banks and gas transfers.
Nominations Deadlines
2 PM
Timely Cycle
7 PM
Evening Cycle
11 AM
Intraday 1 Cycle
3:30 PM
Intraday 2 Cycle
8 PM
Intraday 3 Cycle
Explore Maryland
Reference Material
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104 KB
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119.7 KB
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79.5 KB
Retainage
Here are our current percentages, effective January 2026.
1.0%
CMD Transportation
Transportation
This program is available for all commercial and industrial customers.
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Contact Us
Our team is here. Please reach out if you're having trouble finding what you need.
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Aviator Contact
Password Support
1-866-891-4127
Other Support
TransporationSupport@NiSource.com
File Exchange Contact
Transportation Service Contact
Columbia Gas: GTSTeam@NiSource.com
NIPSCO: GTS@NiSource.com
Nominations Contact
Credit Support Contact
NiSource
NiSource, the parent company of Columbia Gas and NIPSCO, is a premier regulated utility company providing services to millions of residential customers and businesses depending on reliable, affordable energy.
© Columbia Gas of Maryland.