Seventeen search warrants were executed and Mr Keall said more arrests were likely.
"We are continuing to crack down on drug dealing houses and the criminals who run them.
"This operation was a planned response to information received from and concerns expressed by the local community."
The armed offenders squad assisted in the arrest a 37-year-old Nawton (west Hamilton) man whose methamphetamine laboratory was found in a vehicle near Cambridge.
Those arrested are facing a range of charges including possession for supplying methamphetamine and cannabis, manufacturing methamphetamine and cannabis and receiving stolen property.
Three referrals have been made to Child, Youth and Family.
- NZPA