Where does the pathway of water start in a facility?

The pathway of water in a facility begins where city water enters, as this is the primary source of water supply. This point is crucial because it is the initial entry of potable water into the facility, and it typically undergoes various checks and treatments to ensure it meets health and safety standards before being distributed for use.

Understanding this starting point is essential for managing the entire water treatment process effectively. Once the water arrives, it can be directed to treatment systems that may include filtering, softening, or further purification, depending on the facility's requirements. Establishing control and monitoring procedures at this point is vital for maintaining water quality throughout the facility.

The other options, while related to water management, do not represent the starting point of the water pathway. The kitchen sink, for instance, is an endpoint where water is used, not where it enters the system. The water treatment area is where processes occur, and the backflow preventer serves to protect the water supply from contamination but is positioned further along the water distribution path rather than at the source.