EX-32.1 5 ecl-20250930xex32d1.htm EX-32.1

Exhibit (32.1)

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Section 1350 Certifications

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Pursuant to 18 U.S.C. Section 1350, each of the undersigned officers of Ecolab Inc. does hereby certify that:

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(a) | the Quarterly Report on Form 10-Q of Ecolab Inc. for the quarter ended September 30, 2025 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

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(b) | information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Ecolab Inc.

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Dated: October 30, 2025 | ​ | ​ | /s/ Christophe Beck
​ | ​ | ​ | Christophe Beck
​ | ​ | ​ | Chief Executive Officer
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Dated: October 30, 2025 | ​ | ​ | ​
​ | ​ | ​ | /s/ Scott D. Kirkland
​ | ​ | ​ | Scott D. Kirkland
​ | ​ | ​ | Chief Financial Officer

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