A Portland school board member has pleaded guilty to a misdemeanor charge of driving to endanger as part of a plea agreement in which a more serious charge of drunken driving was dismissed.

Jenna Vendil, who is running for reelection in November, must report Friday to begin a 72-hour public service sentence at a camp at Damariscotta Lake State Park in Jefferson. She was also fined $575, and her driver’s license was suspended for 30 days.

Vendil, 31, pleaded guilty and was sentenced Oct. 13 before Justice Joyce Wheeler in the Cumberland County Courthouse.

Vendil, in her sixth year on the board, was charged with driving drunk on June 27 after she was stopped in Scarborough and failed a field sobriety test, police said at the time. She was driving a 2013 Chevrolet Cruze when she was seen driving erratically by a Scarborough officer at 11:11 p.m., police said. She had just pulled out of the McDonald’s on Route 1 and was going north. She was pulled over on the Interstate 295 connector, police said.

Vendil apparently was alone in the car, police said. She told police she was coming from a friend’s house.

Police would not release the results of a breath test at the time of her arrest, and it is not in court records.

Vendil did not return a phone message seeking comment Wednesday.

Her attorney, Matthew Nichols, said he did not recall Vendil’s exact blood-alcohol level but said it was “low.” Because of that and the way police did her field sobriety test, he said, it would have been difficult for prosecutors to get a conviction for drunken driving, a misdemeanor punishable by as much as a year in jail.

“There were problems with the way it was administered. She had a severely sprained ankle and was on crutches,” Nichols said. “There just wasn’t much of a case for operating under the influence, but there was some erratic driving. She explained to the police officer that she was digging her cellphone out of her purse to plug it in.”

Nichols said Vendil got no special treatment because she is an elected official. He said he is unsure whether prosecutors knew she serves on the school board.

Assistant District Attorney Bud Ellis is at a prosecutors’ conference and did not immediately respond to an email seeking comment.

While Vendil is serving her 72-hour sentence, she will miss a scheduled school board retreat Saturday morning at the University of Southern Maine. According to the retreat agenda on the Portland Public Schools’ website, its purpose is to “increase cohesion regarding governance roles and responsibilities as part of preparing to bring on the next Superintendent.”

Vendil was elected in 2009 and was selected as one of MaineToday Media’s 40 Under 40, a list of emerging young leaders in the state. She represents the city’s District 1.