What do domestic water systems provide in a healthcare facility?

Domestic water systems in a healthcare facility are primarily designed to deliver water for everyday use. This includes providing water for drinking, cooking, personal hygiene, and the general sanitation needs of the facility. These systems are essential for supporting the daily operations of both the staff and patients, ensuring that there is a reliable supply of clean and safe water available at all times.

While fire fighting water supply, wastewater treatment, and emergency water supplies are vital components of a facility's overall infrastructure, they serve different specific purposes. Fire fighting systems are designed to handle emergencies related to fires, providing the necessary pressure and volume for sprinkler systems and hoses. Wastewater treatment is focused on managing and processing sewage and water from toilets and sinks to protect public health and the environment. Emergency water supplies are specifically set aside for use during situations where the normal water supply is disrupted.

In summary, domestic water systems are crucial for meeting the routine, everyday water needs of the healthcare facility, making option B the most accurate choice in the context of this question.