For Release: 05/03/2010

Michigan Gas Utilities Community and Environmental Report

Monroe, MI - Michigan Gas Utilities, a subsidiary of Integrys Energy Group (NYSE:TEG), has released its community and environment report. The report, "The Promise We See: Our Stories of Community & Environment 2009," is available online at: www.michigangasutilities.com. The summary includes information about the company's corporate giving (which includes contributions from the Wisconsin Public Service Foundation – supported by Michigan Gas Utilities and Integrys Energy Group) and community volunteer efforts, as well as its environmental principles and efforts to increase awareness about the environment.

Report highlights:

Community

Environment

Note: The Wisconsin Public Service Foundation, incorporated in 1964, is a private, charitable foundation that supports charities and organizations that need financial assistance. Wisconsin Public Service Foundation is funded by stockholders of the corporation, not by its electric and gas customers. Through direct grants, scholarships and an employee Matching Gifts and Dollars for Doers program, the Foundation actively supports improvements in the quality of life in communities served by Wisconsin Public Service, Minnesota Energy Resources, Michigan Gas Utilities, and Upper Peninsula Power Company.

About Michigan Gas Utilities

Michigan Gas Utilities Corporation is a subsidiary of Integrys Energy Group. Michigan Gas Utilities is a natural gas utility, headquartered in Monroe, MI, serving approximately 166,000 customers in lower Michigan.

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