A boil water notice has been issued for Jonesborough Utility Department customers.According to town administrator Glenn Rosenoff the boil water notice comes after crews are opening water lines to restore water to customers. Currently, the levels at one of the Jonesborough water tanks read 30 feet, about 500,000 gallons above the critical 20-foot level. He adds we want to clarify that boiling was NOT required until lines that were closed were opened and since we are opening lines, there is potential that debris from breaks could filter back into the water system.