NiSource Schedules Earnings Release and Conference Call for Feb. 1

MERRILLVILLE, Ind., Jan. 14, 2011 /PRNewswire/ — NiSource Inc. (NYSE: NI) today
announced the company will host an analyst conference call at 9 a.m. ET (8 a.m.
CT) on Tuesday, Feb. 1, 2011, to review its year-end and fourth quarter 2010
financial results and to provide a general business update.

NiSource will release its year-end and fourth quarter earnings before U.S.
financial markets open on Feb. 1.

All interested parties may hear the conference call live on Feb. 1 by logging
onto the NiSource website at www.nisource.com. A link on the home page will
provide access to the audio webcast.

A replay of the call will be available beginning by noon ET on Feb. 1 through
Feb. 8. To access the recording, call 1-888-286-8010 and enter pass code
19419278. For international participants to hear the replay, please dial
1-617-801-6888 and enter the same pass code as above, 19419278. The recording of
the call also will be archived on the NiSource website.

About NiSource

NiSource Inc., based in Merrillville, Ind., is a Fortune 500 company engaged in
natural gas transmission, storage and distribution, as well as electric
generation, transmission and distribution. NiSource operating companies deliver
energy to 3.8 million customers located within the high-demand energy corridor
stretching from the Gulf Coast through the Midwest to New England. Information
about NiSource and its subsidiaries is available via the Internet at
www.nisource.com. NI-F

SOURCE NiSource Inc.