FILE-Image of cannabis plants at facility. (Photo by MAURO PIMENTEL/AFP via Getty Images) WASHINGTON - Positive marijuana drug tests for employees soared in U.S.
workplaces last year, according to Quest Diagnostics' annual drug index published on March 30.Quest Diagnostics, one of the nation's largest drug testing laboratories, reported that employees testing positive for marijuana spiked across all job industries from 2017 to 2021.
Food service jobs had the highest number of positive marijuana drug tests at 7.5%.Quest collected data from over 11 million unidentified urine, hair, and oral fluid drug test results between January and December 2021.Dr.
Barry Sample, the director of science and technology at Quest Diagnostics, is a member of the data collection for the report."We have been publishing the data of our drug testing going back over 30 years to 1988.