Ecolab provides water treatment, hygiene and infection prevention products and services to customers across food service, hospitality, healthcare, industrial and energy sectors. Much of its business is built around on-site service, with technicians visiting customer locations regularly to monitor water and chemical systems, a model that creates sticky, recurring relationships that are hard for competitors to displace once established. The company's water treatment technology helps industrial customers reduce water usage and manage wastewater, an increasingly important consideration as water scarcity concerns grow in some regions and as environmental regulations tighten. Ecolab's revenue is tied to activity levels in the industries it serves, particularly food service and hospitality, but also benefits from customers' growing focus on hygiene, safety and resource efficiency as ongoing priorities rather than discretionary spending.