What is a Non-Transient Non-Community Water System (NTNCWS)?

A Non-Transient Non-Community Water System (NTNCWS) is characterized by consistently providing water to more than 25 of the same people for at least six months of the year. This definition is important as it distinguishes NTNCWS from other types of water systems like transient systems, which serve different populations (e.g., at a campground or temporary event) and community systems, which provide water to residents primarily on a year-round basis.

The consistent service to a stable population over an extended period indicates the system's capacity and regulatory requirements, which differ from systems that cater to varying groups or smaller populations. By understanding this definition, one can appreciate the operational complexities and water quality standards necessary to serve a fixed customer base, ensuring that potable water is safe and reliable throughout the year.