Mar. 30, 2022 – The percentage of working Americans testing positive for drugs hit a two-decade high last year, driven by an increase in positive marijuana tests, as businesses might have loosened screening policies amid nationwide labor shortages.

Of the more than six million general workforce urine tests that Quest Diagnostics Inc., one of the country’s largest drug-testing laboratories, screened for marijuana last year, 3.9% came back positive, an increase of more than 8% from 2020, according to Quest’s annual drug-testing index.

That figure is up 50% since 2017. Since then, the number of states that legalized marijuana for recreational use grew to 18 from eight, plus the District of Columbia.

Despite the increase in positivity last year, fewer companies tested their employees for THC, the substance in marijuana primarily responsible for its effects, than in recent years, said Barry Sample, Quest’s senior science consultant.  The shifting legal backdrop and changing cultural attitudes have prompted some employers to stop testing for marijuana while companies in some states are barred from factoring the test results into hiring decisions, according to Dr. Sample. And those trends accelerated last year amid the recent shortage of workers, especially in states where recreational marijuana is legal, Dr. Sample added.

“We’ve been seeing year-over-year declines in those recreational-use states, but by far the largest drop we’ve ever seen was in 2021,” he said about the number of drug tests that screened for THC.


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