POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS, That the undersigned, a director of Ecolab Inc., a Delaware corporation, does hereby make, nominate and appoint KENNETH A. IVERSON and LAWRENCE T. BELL, and each of them, to be my attorney-in-fact, with full power and authority to sign his name to the Annual Report on Form 10-K of Ecolab Inc. for the fiscal year ended December 31, 2001, and all amendments thereto, provided that the Annual Report and any amendments thereto, in final form, be approved by said attorney-in-fact; and his name, when thus signed, shall have the same force and effect as though I had manually signed said document.

IN WITNESS WHEREOF, I have hereunto affixed my signature this 22^nd day of February, 2002.

/s/ Les S. Biller

Les S. Biller

/s/ Jerry A. Grundhofer

Jerry A. Grundhofer

/s/ Stefan Hamelmann

Stefan Hamelmann

/s/ James J. Howard

James J. Howard

/s/ William L. Jews

William L. Jews

/s/ Joel W. Johnson

Joel W. Johnson

/s/ Ulrich Lehner

Ulrich Lehner

/s/ Jerry W. Levin

Jerry W. Levin

/s/ Robert L. Lumpkins

Robert L. Lumpkins

/s/ Hugo Uyterhoeven

Hugo Uyterhoeven