Which type of water supply systems serve small populations independently?

Non-community systems are specifically designed to serve small populations independently, often in locations where municipal water supplies are not accessible. These systems can include a variety of setups, such as those found in rural areas, where the population is temporary or fluctuates, like in campgrounds, schools, or businesses that do not operate year-round. By definition, non-community water systems are fundamentally distinct from community and public systems, which typically cater to larger, more stable, and permanent populations.

Community systems provide water to a residential area and are designed for populations of 15 or more connections or 25 or more people year-round. Public systems similarly serve a larger population and are often mandated to meet stringent regulatory requirements for safety and quality. Transient systems, while they may serve populations that change, are usually short-term services like those found in gas stations or rest areas, thereby further distinguishing them from the independent nature of non-community systems.

This understanding clarifies why non-community systems are recognized as serving small populations independently, highlighting their specific function and context within water supply classification.