A boil water advisory issued for customers in the Mechanicsburg area could be lifted late this evening.
United Water Pennsylvania and the state Department of Environmental Protection Company said today that the system passed the first round of water quality testing.
The results of a second test sample are expected this evening.
United Water spokesman Robert Manbeck said that if the second test results are favorable, the advisory could be lifted tonight because all corrective actions, including fire hydrant flushing, were completed before the water quality tests were performed.
A DEP spokesman said yesterday that the boil water advisory could continue through Saturday morning, but Manbeck said that time frame was made before the company received the initial test results.
The advisory affects only United Water customers in Mechanicsburg and portions of Hampden, Silver Spring, Monroe, Monaghan, Lower Allen and Upper Allen townships.
Customers in Center Square and Grantham, including Messiah College, are not affected by the advisory because they are served by another water system.