Which system serves a population of 25 or more?

A community water system is defined as a system that serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents. This classification is significant because community systems are subject to certain regulatory requirements to ensure safe drinking water for the population they serve.

In contrast, a non-community water system serves people at places like schools or campgrounds, where individuals are present only temporarily. A transient system is a specific type of non-community system that serves a transient population, such as service stations or hotels. An independent system generally refers to privately owned systems that might not have the same regulatory oversight as community systems.

Therefore, since the question specifies a system that serves a population of 25 or more consistently, the community system is the appropriate classification.