About 900 Pennsylvania American Water customers in the City of Butler, Butler Township and Center Township were placed under a precautionary boil water advisory Saturday.

Heather DuBose, external affairs specialist for Pennsylvania American Water, said there was a loss of water pressure Saturday at a water storage tank in the City of Butler following a 12-inch water main break along Delwood Road in Butler.

The broken main limited the company's ability to replenish the water storage tank and local system.

Crews finished repairing the pipe, and service was restored to customers in the affected areas Saturday evening, according to Pennsylvania American Water. Tank water levels have returned to normal and water quality sampling is underway.

Click here for a map of those affected: http://www.onsolve360.com/alert?id=9-37801