All 27 Somerville business tested in an alcoholic beverage purchase law compliance check passed, according to the city.
Conducted by the Somerville Police Department and Somerville Cares About Prevention, teenagers were sent into package stores, bars, and restaurants that had full liquor licenses to try to purchase alcohol.
In a statement, police Chief Tom Pasquarello said he was pleased with the outcome of the check.
"Most of our stores, bars, and restaurants take this responsibility seriously," he said. "We appreciate their cooperation, and their commitment to keeping alcohol out of underage hands."