Which of the following best describes a non-community water system?

A non-community water system is characterized by its service to transient users rather than a permanent population. This type of system typically serves facilities such as campgrounds, restaurants, and schools that do not have a consistent population but can have varying numbers of people using the water supply at different times.

Transient users are individuals who are not permanent residents but need access to water services temporarily, which is a defining feature of non-community systems. In contrast, options that describe systems serving a single-family home or a continuous population focus on more stable, predictable water usage patterns, which do not align with the transient nature of non-community systems. Likewise, while rural water supplies can sometimes fit into non-community systems, they are not exclusively defined by the transient nature of their user base as is the case in option C.