Boil advisory issued in Upper Sandusky Posted on December 10, 2022 0 The city of Upper Sandusky issued a boil advisory Friday for all customers east of the U.S. 23/30 overpass at CH 330. The boil alert will remain in effect until early next week. For more information this weekend, contact the water department at 419-294-2416 from 7 a.m. to 7 p.m. Saturday and Sunday. Updates will be provided as soon as they are available.