Authorities with the Warren Water District issued a boil advisory for customers east of Highway 65/69 in Warren County and the city of Milo after the rural water district experienced a ruptured water line late Sunday that affected water levels and pressure in several water towers. Nearly 5,900 rural customers are affected. The city of Indianola operates their own water supply and is not affected by this order. Repairs were made early this a.m., but residents should boil water as a precaution.