The Altoona Water Authority has issued a boil water advisory in Altoona after a water main broke on 25th Avenue and 11th Street.

Officials told us only 13 people are affected by the advisory and the Altoona Water Authority delivered hand-written notes to those affected and were able to personally talk to those affected if they were home.

The Water Authority will test the water on Friday from 7 to 7:30 a.m. and will conduct a second test on Saturday.

Those affected will be notified again on Sunday.