Thomas Henry Higgs, 59, allegedly showed objective signs of intoxication while driving a marked car on campus during a May 7 department briefing, according to the Orange County District Attorney's Office.
Officers notified their command staff, which investigated the case and reportedly found Higgs to have a blood alcohol content of 0.09, just over California's legal limit of 0.08.
If convicted, Higgs faces a maximum sentence of six months in county jail.
His arraignment is scheduled for Aug. 8 at the North Justice Center in Fullerton.