The seventh annual Operation Unite has given Counties Manukau police their best result yet.
Just 56 drivers in the district were confirmed to have excess breath alcohol out of more than 10,000 people tested at compulsory checkpoints.
That is an improvement on previous years and a sign police messages are getting through, district commander superintendent John Tims says.
"Hopefully we will see this kind of positive attitude and limited alcohol-related disorder throughout the Christmas period this summer."
Operation Unite focuses on preventing alcohol sales to minors, booze-fuelled violence and drink driving.