The latest happened Saturday night on the Horseback Road in Burnham.
Maine State Police said they discovered an active meth lab in a mobile home when they went to conduct a bail check on Amber Nayock, 29. She was arrested and charged with trafficking in meth.
Meanwhile, a second alleged meth lab was discovered Thursday in Howland.
Drug agents were called after the fire department responded to a report of smoke and a strange odor coming from an apartment on Westside Drive. Officials said they found the makings of a meth lab and arrested Kelly Moore, 52, on the charge of aggravated operation of a meth lab.
The charge was elevated to aggravated because it was operated in a multi-unit building.