This section of the website contains information that should be considered accurate as of the date presented. You acknowledge that this information may change over time and you should not assume that the information is accurate at a later date. Quest Diagnostics is not obligated to update the information contained in this section of the website.
Jun 9, 2015
Upsurge in marijuana, cocaine and methamphetamine drive second consecutive year of increases in the positivity rate for drug tests, suggesting a potential reversal in a decades' long decline in workforce drug use