Due to a water main break, homeowners between C and D avenues and intersections with Highway 1 are being asked to boil their water. The three to four block area impacted by the boil advisory issued by the Iowa Department of Natural Resources includes approximately 40 homes and a motel. After water samples collected about 24 hours apart have tested clean for bacteria, the city will lift the advisory and the city and the DNR will notify residents when water is safe to drink.