A man was reported for drink driving at Port Lincoln early on Monday morning.
Just after 1am Police stopped a Toyota ute on Hallett Place and breath tested the driver.
The man allegedly produced a blood alcohol reading of 0.162, more than three times the legal limit.
A 31-year-old man from Port Lincoln was reported for drink driving and issued with a 12-month immediate loss of licence.
His car was also impounded for 28 days.