Drugs in bottles "Employers are wrestling with significant recruitment and retention challenges, as well as with maintaining safe and engaging work environments that foster positive mental and physical wellbeing," says Quest Diagnostic's Keith Ward. (Photo: Shutterstock)

The rate of positive drug tests in the U.S. workforce has climbed to its highest level in more than two decades.

"Our Drug Testing Index reveals several notable trends, such as increased drug positivity rates in the safety-sensitive workforce, including those performing public safety and national security jobs, as well as higher rates of positivity in individuals tested after on-the-job accidents," said Barry Sample, Ph.D., senior science consultant for Quest Diagnostics.

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