Examples of non-community water systems include:

Non-community water systems are typically defined as public water systems that are not regularly serving the same people year-round. Highway rest areas serve transient populations and do not have a permanent residential base, making them a prime example of a non-community water system. Such facilities provide water services to individuals who are traveling and may only stop for a short period, thus aligning with the definition of non-community systems.

In contrast, industrial plants, residential apartments, and public schools typically serve a stable, ongoing group of individuals. Industrial plants usually have dedicated water supplies for their operations and may not generally provide drinking water to the public. Residential apartments are considered community systems since they serve residents living there on a more permanent basis. Public schools also have a set population of students and staff that use their water systems regularly, qualifying them as community systems rather than non-community systems.