A two-day operation to detect drivers with illicit drugs in their system was completed in Yamba and Maclean over the weekend.
Inspector Tony Milner from Grafton police said the wet weather hampered Saturday’s operation in Yamba, where nine of the 87 mobile drug tests were positive.
On Sunday, in Maclean, eleven of 250 tests conducted were positive.
Inspector Milner said tests in each of the towns returned positive results for “illicit drugs: cannabis and methyl amphetamines”.
“There were 20 positive tests and aver 330 tests completed,” he said. “Those numbers are fairly consistent with other areas of the north coast, which is between five and eight per cent [positive tests], which is quite high.
“It is a concern that so many people are on the roads returning positive tests.”
Inspector Milner said there would be more blitzes in the future that “will come and go, however I cannot predict when”.