Drug & Alcohol Clearinghouse
The FMCSA's secure online database of CDL driver drug and alcohol violations, including positive test results, refusals to test, and return-to-duty status.
Employers must conduct a full pre-employment query before hiring a CDL driver and an annual limited query for all current drivers. The Clearinghouse has been operational since January 6, 2020.
Last updated: June 4, 2026