Twelve addresses in west and east Medford neighborhoods are under an advisory to boil their water until further notice, according to the Medford Water Commission.
The advisory comes after the installation of a new segment of pipe, which inadvertently depressurized the water main for Meadows Lane and Cherry Street, the agency said in a news release, and harmful bacteria could be in the supply for the dozen addresses.
Addresses under the advisory include:
1701, 1709, 1717, 1720, 1721, 1722, 1724 and 1726 Meadows Lane.
609, 611, 612 and 616 Cherry St.
Customers at those addresses should bring water to a rolling boil for one minute, then allow it to cool before use. Water used for drinking, brushing teeth, washing produce, preparation of food and baby formula, making ice and cleaning food-contact surfaces should be boiled first, officials said.
"We will inform you when tests show no bacteria and you no longer need to boil your water," the release said.