Which of the following is NOT a primary use of water in fire operations?

Water serves several critical roles in fire operations, primarily focused on fire suppression and control. The primary uses include cooling hot surfaces to prevent re-ignition and reduce heat hazards, extinguishing fuel spills and fires by flooding the area and removing heat, and curtailing smoke production, which helps improve visibility and safety during firefighting efforts.

Supplying drinking water, while essential in various contexts, particularly for the wellbeing of firefighters during extended operations, does not fall under the classification of a primary use of water in fire operations. The main objectives during firefighting focus on immediate fire control and damage mitigation rather than potable water supply. Thus, when considering the specific roles of water in the context of fire management, supplying drinking water is not a primary function, making it the correct choice in this scenario.