Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The latest general information on the Coronavirus (COVID-19) is available on For PHMSA contact information during the COVID-19 health emergency, please visit our page.

United States Department of Transportation United States Department of Transportation

Drug and Alcohol Testing Program Overview

drug alcohol image

The drug and alcohol testing regulations require operators, and their contractors, of natural gas and other gas pipeline transportation, hazardous liquids pipeline transportation, and liquefied natural gas (LNG) pipeline facilities to:

  • Have anti-drug and alcohol misuse prevention plans and programs applicable to persons who perform operating, maintenance, or emergency-response functions covered by the DOT pipeline safety regulations in 49 CFR Parts 192, 193 or 195. 

Stakeholder potentially exempted from this PHMSA pipeline safety program may include those operators of master meter systems (Ref: 49 CFR Part 191) and pipeline systems that transport only petroleum gas or petroleum gas/air mixtures (Ref: 49 CFR Part 192). 

Drug testing under 49 CFR Part 199, Subpart A, is to be conducted as follows:  

  • Prior to employment, after an accident, randomly, upon reasonable cause, upon the return to duty, and; 
  • Substance Abuse Professional (SAP) required random follow-ups, of an employee who fails or refuses a DOT drug test  required under Part 199. 

Alcohol testing under Part 199, Subpart B is to be conducted as follows:  

  • After an accident, upon reasonable suspicion, upon the return to duty, and;
  • SAP required random follow-ups, of an employee who fails or refuses a DOT alcohol test required under Part 199. 

The criteria or standards for conducting drug specimen collection and testing, as well as, alcohol concentration testing, must follow applicable requirements under 49 CFR Part 40.

Last updated: Wednesday, June 28, 2017