A quarter of licensed premises in eastern Kaipara sold alcohol to underage drinkers during a police sting.
During a recent controlled-purchase operation at licensed premises, two out of eight broke the law and shocked police and Northland DHB staff who conducted it.
During the operation, two underage volunteers tried to buy alcohol from licensed premises. Two of the eight licensed premises sold to the underage teens. Whangarei/Kaipara Police spokesman Sergeant Howard Clement said the result was disappointing.
"The premises involved should have had better systems in place regarding the sale of alcohol to minors," he said.
Northland DHB and police have been running joint controlled-purchase operations (CPOs) in Northland for almost 10 years.