Exhibit 99.1 News Release Investor Contact: Media Contact: Andrew Hedberg (651) 250-2185 Nigel Glennie (651) 250-2576 Cairn Clark (651) 250-2291 ECOLAB DELIVERS VERY STRONG FIRST QUARTER PERFORMANCE REPORTED DILUTED EPS $1.43; ADJUSTED DILUTED EPS$1.34, +52% INCREASED 2024 ADJUSTED DILUTED EPS OUTLOOK: $6.40 -$6.70, +23% - 29% FIRST QUARTER HIGHLIGHTS ● Reported sales $3.8 billion, +5% versus last year. Organic sales +5%, led by strong growth in the Institutional & Specialty and Pest Elimination segments, ...