EXHIBIT (24.1)

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 DOUGLAS M. BAKER, JR., MICHAEL C. MCCORMICK and THEODORE D. HERZOG, 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, 2017, 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 23rd day of February, 2018.

/s/Barbara J. Beck

Barbara J. Beck

/s/Les S. Biller

Les S. Biller

/s/Carl M. Casale

Carl M. Casale

/s/Stephen I. Chazen

Stephen I. Chazen

/s/Jeffrey M. Ettinger

Jeffrey M. Ettinger

/s/Arthur J. Higgins

Arthur J. Higgins

/s/Michael Larson

Michael Larson

/s/David W. MacLennan

David W. MacLennan

/s/Tracy B. McKibben

Tracy B. McKibben

/s/Victoria J. Reich

Victoria J. Reich

/s/ Suzanne M. Vautrinot

Suzanne M. Vautrinot

/s/John J. Zillmer

John J. Zillmer