1 [ARTHUR ANDERSEN LLP LETTERHEAD] EXHIBIT(15) To CMS Energy Corporation: We are aware that CMS Energy Corporation has incorporated by reference in this registration statement its Form 10-Q for the quarter ended March 31, 1997, which includes our report dated May 9, 1997, covering the unaudited interim financial information contained therein. Pursuant to Regulation C of the Securities Act of 1933, this report is not considered a part of the registration statement prepared or certified by our Firm or report prepared or certified by our Firm within the meaning of Sections 7 and 11 of the Act. /s/ Arthur Andersen LLP Detroit, Michigan, May 20, 1997.