MCKEESPORT, Pa. (AP) — More than 16,000 customers in four western Pennsylvania communities are waiting to learn if a boil water advisory has been lifted. The Municipal Authority of Westmoreland County told residents in McKeesport, Port Vue, Versailles and White Oak to boil their water after a pump failed on Saturday. The agency says the McKeesport Water Treatment Plant is operating and purging air from its system. Two successful tests are needed before the boil water advisory will be lifted.