EXHIBIT 15 November 13, 1998 FirstEnergy Corp. 76 South Main Street Akron, OH 44308 Gentlemen: We are aware that FirstEnergy Corp. has incorporated by reference in its Registration Statements No. 333-48587, No. 333-48651, No. 333-58279 and No. 333-65409 its Form 10-Q for the quarter ended September 30, 1998, which includes our report dated November 13, 1998 covering the unaudited interim financial information contained therein. Pursuant to Regulation C of the Securities Act of 1933, that report is not considered a part of the registration statements prepared or certified by our firm or a report prepared or certified by our firm within the meaning of Sections 7 and 11 of the Act. Very truly yours, ARTHUR ANDERSEN LLP