Workplace Drug Testing Policies

Legal Framework

Workplace drug testing is governed by a complex web of federal and state laws. There is no single federal law requiring or prohibiting drug testing for most private employers, but several laws affect how testing programs are implemented.

Types of Testing

Pre-Employment Testing

The most common form of workplace drug testing. Typically conducted after a conditional offer of employment.

Random Testing

Employees are selected for testing without advance notice. While legally permissible in many jurisdictions, some states restrict random testing to safety-sensitive positions.

Reasonable Suspicion Testing

Conducted when a supervisor has specific, articulable reasons to believe an employee is under the influence. Train supervisors to recognize and document signs of impairment.

Post-Accident Testing

Conducted following a workplace accident or near-miss. Some states restrict post-accident testing unless there is reasonable suspicion that drugs or alcohol contributed to the incident.

Return-to-Duty and Follow-Up Testing

For employees returning to work after a positive test or completion of a substance abuse program.

State Law Considerations

State laws vary significantly:

• Some states require specific procedures for testing
• Several states restrict testing to certain circumstances
• Many states require written policies and advance notice to employees
• Cannabis legalization has created additional complexity in many jurisdictions
• Some states prohibit adverse action based solely on a positive marijuana test

Building a Compliant Policy

1. Research applicable laws in every state where you have employees
2. Define the purpose and scope of your testing program
3. Specify testing circumstances clearly (pre-employment, random, reasonable suspicion, etc.)
4. Identify substances included in the testing panel
5. Establish procedures for collection, testing, and confirmation
6. Define consequences for positive results, refusals, and adulteration
7. Include employee assistance information
8. Require acknowledgment from all employees

DOT-Regulated Employers

Employers subject to Department of Transportation regulations must comply with specific testing requirements, including:

• Testing for specific substances
• Using certified laboratories
• Following detailed collection procedures
• Using qualified substance abuse professionals
• Maintaining specific records

Cannabis Considerations

With expanding cannabis legalization:

• Review your policy in light of state law changes
• Consider whether to test for cannabis in non-safety-sensitive positions
• Understand the difference between testing for impairment versus mere presence
• Update policies as laws evolve