The 33-year-old DJ was pulled over near Baker, Calif. at 10:30 am for speeding and after she refused to submit to a breathalyzer test on the scene, she was arrested and taken to the Barstow jail.
Once at the jail, however, she changed her mind and did take a breathalyzer, authorities tell us.
She was released from the jail several hours later.
The District Attorney’s office tells us it will be a day or two until it decides whether to file charges against her.
Ronson was traveling back from Las Vegas where she spun at the Lavo nightclub in the Palazzo Sunday night.