Who This Applies To

These testing rates apply to employers and employees regulated by:

  • FMCSA (Federal Motor Carrier Safety Administration)
  • FRA (Federal Railroad Administration)
  • FTA (Federal Transit Administration)
  • PHMSA (Pipeline and Hazardous Materials Safety Administration)
  • FAA (Federal Aviation Administration)
  • USCG (United States Coast Guard)

Current Random Testing Rates

The following chart outlines the annual minimum drug and alcohol random testing rates established within DOT Agencies and the USCG for the current year.

DOT Agency 2025 Random Drug Rate 2025 Random Alcohol Rate
Federal Motor carrier safety administration (FMCSA) 50% 10%
Federal Aviation Administration (FAA) 25% 10%
Federal Railroad administration (FRA) 25% for HOS and MOW Employees 10% for HOS and MOW Employees
Federal Railroad administration (FRA) 50% for MECH Employees 25% for MECH Employees
Pipeline & hazardous materials safety administration (PHMSA) 50% N/A
Federal Transit Administration (FTA) 50% 10%
united states coast guard (USCG) 50% N/A

Important Notes

New FRA Rules in effect since June 12, 2017: Maintenance-of-Way (MOW) employees are tested at higher rates.
 [Click here for full details]
Employers and C/TPAs subject to multiple DOT agency rules may combine employees into one random selection pool.

  • However, they must test at or above the highest applicable testing rate across all agencies involved.
  • For clarification, contact the appropriate DOT agency.
 [Click here for agency contact numbers]
    USCG-covered employees may be included in DOT testing pools, even though the USCG is now part of the Department of Homeland Security.

Reference