"I made an error in judgment," Pennington said in a statement released through his publicist, Stan Rosenfield.
"We all make mistakes, however this is about accountability. Under no circumstances should anyone consume alcohol while driving. I could have jeopardized the lives of others and I am grateful there was no accident or harm done to anyone," the reality TV host said.
Pennington was arrested on a misdemeanor charge shortly after 12:30 a.m. Saturday by the Los Angeles Police Department's West Traffic Division, according to inmate information posted on the county Sheriff's Department Web site.
Pennington was released two hours later after posting $5,000 bail and was due back in court June 4, according to the Web site.
"This was my wake-up call," Pennington said. "I also want to apologize to my fans, ABC Television and my design team for my lapse in judgment and the embarrassment I have caused."
Police officials said Monday they had no further information.