Conn. Gen. Stat. § 7-333: Metropolitan districts. Definitions.

Whenever used in sections 7-334 to 7-339, inclusive, “metropolitan area” means any area in which there is a city having a population according to the last-completed federal census of twenty-five thousand or more, designated hereafter as the “central city”, and any town, city or borough any part of which is not more than fifteen miles distant from the nearest boundary of such central city.