ST. PAUL, Minn. – May 19, 2021 – Ecolab Inc. has revised the date for its previously announced Investor Day for professional investors to Tuesday, Sept. 14, 2021.

About Ecolab

A trusted partner at nearly three million customer locations, Ecolab (ECL) is the global leader in water, hygiene and infection prevention solutions and services. With annual sales of $12 billion and more than 44,000 associates, Ecolab delivers comprehensive solutions, data-driven insights and personalized service to advance food safety, maintain clean and safe environments, optimize water and energy use, and improve operational efficiencies and sustainability for customers in the food, healthcare, hospitality and industrial markets in more than 170 countries around the world. www.ecolab.com.

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Investor Contacts:

Michael Monahan

+1 651 250 2809

Nate Brochmann

+1 651 250 3837

Andrew Hedberg

+1 651 250 2185

May 19, 2021

(ECL-C)