Data released by the Federal Motor Carrier Safety Administration (FMCSA) gathered from its Commercial Driver’s License (CDL) Drug and Alcohol Clearinghouse showed the number of positive driver drug tests through August 2021 increased by nearly 13 percent when compared with 2020, according to a monthly summary report.

The August 2021 Monthly Summary Report showed jumps in all three of the top drug use categories – marijuana, cocaine, and methamphetamines – with the overwhelming majority of the positive tests being for marijuana. Here are the number of positive drug tests for the first eight months of 2021 compared with a year ago:

  • Marijuana – 21,438, up from 18,252
  • Cocaine – 5,913, up from 5,233
  • Methamphetamines – 3,526, up from 3,379
  • All 14 drug panels – 39,785, up from 35,252

Since the FMCSA Drug and Alcohol Clearinghouse went into effect on January 6, 2020, the number of positive driver drug tests has reached 95,740, with positive marijuana drug tests accounting for more than 53 percent of the tests since the Clearinghouse launched.

The Drug and Alcohol Clearinghouse is a secure online database that gives employers and government agencies real-time access to information about CDL driver drug and alcohol program violations. To learn more, visit

The FMCSA was established as a separate administration within the U.S. Department of Transportation (DOT).  As the lead federal government agency responsible for regulating and providing safety oversight of commercial motor vehicles (CMVs), FMCSA’s mission is to reduce crashes, injuries, and fatalities involving large trucks and buses.

FMCSA partners with industry, safety advocates, and state and local governments to keep our nation’s roadways safe and improve CMV safety through regulation, education, enforcement, research, and technology. To learn more, visit

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