Exhibit 99.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Glacier Water Services, Inc., (the Company) on Form 10-Q for the period ended June 30, 2002 as filed with the Securities and Exchange Commission on the date hereof (the Report), I, Brian H. McInerney, President and Chief Executive Officer of the Company, certify, pursuant to and for the purposes of 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition of the Company as of the dates indicated and results of operations of the Company for the periods indicated.

/s/    BRIAN H. MCINERNEY        

Brian H. McInerney

President and Chief Executive Officer

August 9, 2002