Concord Vice Mayor Laura Hoffmeister, a longtime elected city official, has been charged by the Contra Costa district attorney on two counts of driving under the influence of alcohol in May, an incident for which she already has declared “full responsibility.”

The vice mayor, who has served on the Concord City Council since 1997 and works in the Clayton city manager’s office, will be arraigned Sept. 13 on one count of driving under the influence and another for driving with a blood alcohol content higher than 0.08% or refusing a test.

It’s unclear whether Hoffmeister, arrested May 26 by Clayton police, submitted to a test, and the District Attorney’s Office declined to provide more information until after she is arraigned. The vice mayor did not respond to requests for comment on the charges.

Hoffmeister did not return a request for comment Thursday, but in a statement provided in May, the vice mayor said she had been driving after having dinner and wine with friends. She offered an apology and mentioned “seeking treatment and measures to ensure that this does not happen again.”

“I am extremely disappointed in myself and deeply sorry in my lack of judgment,” Hoffmeister said in the statement. “I sincerely apologize to the residents of Concord and Clayton, my colleagues, my family and friends. As an elected official, I know the public expects higher standards, and I agree.”

Her arrest in May came days after another high-ranking East Bay official, Antioch Mayor Lamar Thorpe, was charged with two misdemeanor counts of DUI.

Thorpe, who similarly apologized after his arrest earlier in the spring, was already the subject of a recall effort by some Antioch voters, and the charges only intensified the campaign against him.

No such efforts have been launched by Concord voters against Hoffmeister, and Clayton city officials — Hoffmeister serves as assistant to the city manager there — did not respond to a request for comment.

The vice mayor is by far the longest-tenured member of the Concord City Council, having served six terms since 1997. She is up for reelection in November and has filed to run for another term, though she hasn’t yet begun actively campaigning.