(Hagerstown, IN)--A water boil advisory is in effect for the entire town of Hagerstown. Dispatchers were originally notified Thursday night that water was being turned off. That was followed by a reverse 911 call to the town’s 1200-plus phone numbers. The boil advisory is likely to remain in effect Friday and Saturday. Residents of Hagerstown should boil water for five minutes before using it for cooking or drinking.