Adam Roan, 29, 411 W. Kansas St., Afton, was charged 6 p.m. Friday at the Union County Law Enforcement Center with conspiracy to manufacture methamphetamine and possession of precursors.
According to Afton Police Chief John Coulter, Roan was questions by law enforcement after Creston Police Department received a tip from a local business claiming precursors used to manufacture methamphetamine were purchased by Roan.
"Roan was interviewed by law enforcement and a search warrant was obtained," said Coulter.
A large, active methamphetamine lab was found inside Roan's residence, which required the Afton Fire Department and a meth lab cleanup team from the United States Environmental Protection Agency (EPA) in St. Louis to be called.
"In my 25 years, this is probably the fourth- or fifth-largest meth lab I've seen," Coulter said in a phone interview with the Creston News Advertiser Monday.
According to Coulter, the amount of waste and chemicals found within the house indicate the methamphetamine lab has been active for quite some time.
Creston Police Department, Afton Police Department, Union County Sheriff's Office and Iowa Division of Narcotics Enforcement assisted in the search.
Roan is being held in Union County Jail on $100,000 bond.