Drug and Alcohol Clearinghouse (DACH)

The Drug and Alcohol Clearinghouse (DACH) is a secure online database operated by the Federal Motor Carrier Safety Administration (FMCSA). DACH provides employers, state driver licensing agencies, and state law enforcement personnel real-time information about Commercial Driver License (CDL) and Commercial Learner’s Permit (CLP) holders’ drug and alcohol program violations.

DACH contains records of violations of drug and alcohol prohibitions including positive drug or alcohol test results and test refusals. When a driver completes the return-to-duty process and follow-up testing plan, this information will also be recorded in DACH.

Drivers holding a CLP or CDL are subject to this federal requirement and should be registering with DACH. Non-CDL holders and their employers are not subject to DACH requirements and should not be registering with in DACH.

Beginning Nov. 18, 2024, the Tennessee Department of Safety and Homeland Security will be required to check the DACH prior to completing licensing transactions, such as the issuance, renewal, transfer, and the upgrade of a CLP or CDL.

The Tennessee Department of Safety and Homeland Security will also be required to downgrade a person’s CLP or CDL if notified by FMCSA of a DACH violation.

DACH is a FMCSA program and is not administered by the Tennessee Department of Safety and Homeland Security. For more information, visit the FMCSA website or call their information line at 1-800-832-5660.