A boil-water order that had been in effect for about 24 hours in Cumberland because of a broken water main was lifted Thursday.

The Portland Water District lifted the order at 6:35 p.m., the district announced on its website.

The order was issued after the water main broke Wednesday afternoon in Cumberland Center. Schools were closed Wednesday afternoon and all day Thursday, and 600 customers in Cumberland Center were told to boil their tap water before using it. Water district officials said the break had the potential to contaminate drinking water.

“Cumberland customers can now use tap water for all purposes,” the water district said Thursday evening. “Water tests indicate water is safe and the boil order has been lifted.”