Which of the following represents a non-transient non-community water supply?

A non-transient non-community water supply refers to facilities that provide water to a specific population at least 60 days out of the year, but not primarily to permanent residents. These establishments serve individuals who are not part of a residential community but regularly use the facility.

Schools and factories fit this definition because they have a consistent and predictable presence of people, such as students or employees, who access the facility regularly throughout the year. This constant flow of individuals necessitates a reliable water supply, categorizing them as non-transient non-community water sources.

In contrast, churches and gas stations typically do not maintain a stable daily population of users, as attendance can vary significantly, which does not meet the non-transient criteria. Residential neighborhoods obviously serve permanent residents and fall under the category of community water systems. Seasonal campgrounds, on the other hand, may serve visitors but do not have a consistent presence throughout the year, as their usage is dependent on seasons, thus making them transient rather than non-transient. Therefore, schools and factories are the best examples of non-transient non-community water supplies.