NiSource Continues Top-Ten Placement in Newsweek’s ‘Green Rankings’

MERRILLVILLE, Ind., Nov. 1, 2010 /PRNewswire/ — NiSource Inc. (NYSE: NI) ranked
10 out of 32 U.S. utilities in Newsweekmagazine’s “Green Rankings” of the
nation’s largest corporations.

“Our strong showing among utilities in the green rankings is consistent with our
commitment to sustainability and environmental stewardship in all aspects of our
business,” NiSource President & CEO Robert C. Skaggs Jr. noted. “From our
policies to our actions every day, this commitment is essential to our long-term
aspiration to be America’s Premier Regulated Energy Company.”

NiSource’s “Green Policies” score – an assessment of a company’s environmental
policies and performance – remains within the top five among utilities and in
the top 15 percent among all companies in the ranking. The company also
significantly improved its “Reputation” score – based on a poll of CEOs,
environmental officers and other green experts – from 37.59 to 51.47.

Newsweek compiled the rankings by assessing each company’s environmental impact;
policies and strategies; and reputation among peers. The nation’s 500 largest
companies, as measured by revenue, market capitalization and number of
employees, were split into 15 sectors, including utilities.

Sustainability Commitment

On April 16, 2010, NiSource issued its first Sustainability Report, which
outlines the company’s sustainable business approach, including how it continues
to build value through environmental stewardship; customer-focused energy
solutions; strong, stable communities; and engaged, aligned and safe teams.

For example, as a charter member of the U.S. Department of Energy’s Climate
Challenge program, NiSource has reduced carbon dioxide (CO2) emissions by more
than 34 million equivalent tonnes since 1990.

“As a company, we’re proactively addressing environmental issues and look to be
a leader among our peers in that respect,” Vice President of Environmental,
Safety and Sustainability Dale Helmers said. “Our team is focused on creating a
culture of sustainability, which includes environmental stewardship, for all
employees.”

NiSource’s Sustainability Report can be found at www.nisource.com.

Newsweek’scomplete “Green Rankings” are available online at

http://www.newsweek.com/feature/2010/green-rankings.html.

About NiSource

NiSource Inc. (NYSE: NI), 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.