DOT-compliant drug and alcohol testing for safety-sensitive employees in Houston, TX. We provide accurate, fast, and fully compliant mobile collections for pre-employment, random, post-accident, reasonable suspicion testing, and more.
DOT Compliant
Drug Testing
WHAT IS IT?
A DOT drug test is a federally mandated drug screening required by the U.S. Department of Transportation for employees in safety-sensitive positions within the transportation industry. The primary aim is to ensure these employees do not use illicit drugs or misuse prescription medications that could impair their ability to perform their job safely.
DOT drug tests adhere to stringent procedures for sample collection (urine), strict chain of custody, testing by approved laboratories, and a final Medical Review Officer (MRO) evaluation to ensure accuracy and consider any legitimate medical explanations for positive results.
The DOT 5-Panel
Drug Test
- ✓ Urine specimen collection on-site
- ✓ Strict chain-of-custody documentation
- ✓ DOT-approved certified laboratory testing
- ✓ Medical Review Officer (MRO) result review
Who Is Required to Test?
- Commercial truck and bus drivers (CDL holders)
- Airline pilots and aviation personnel
- Railroad conductors and crew
- Pipeline workers
- Ship captains and maritime crew members
Types of DOT Tests
DOT regulations require testing at specific points throughout employment in safety-sensitive roles.
Pre-Employment Testing
Required before an employee is hired for a safety-sensitive position. A negative result is mandatory before beginning work.
Random Testing
Unpredictable and unannounced testing conducted throughout the year. Employees are selected at random from a pool.
Post-Accident Testing
Required after certain types of workplace or transportation accidents, as defined by DOT guidelines.
Reasonable Suspicion
Ordered when a trained supervisor observes behaviors or signs that suggest possible drug or alcohol use.
Return-to-Duty Testing
Required for employees who previously tested positive. Must produce a negative result before returning to safety-sensitive duties.
Follow-Up Testing
Ongoing testing program for employees who have returned to safety-sensitive duties after a positive result or policy violation.
HOW IT WORKS
Our mobile collectors follow every DOT-mandated step — ensuring chain of custody and specimen integrity from collection to result.
Our Testing Process
We Come to You
Our certified collector travels to your worksite or any convenient location.
Specimen Collection
Urine sample collected with full chain-of-custody documentation per DOT protocol.
SAMHSA Certified Laboratory
Sample sent to a DOT-approved certified laboratory for analysis.
MRO Review
Medical Review Officer reviews all results before reporting to the employer.
CONSEQUENCES
What Happens After
a Positive Result?
DOT has strict consequences for positive results or test refusals. Employers are required to act immediately and follow a structured return-to-duty process.
Immediate removal from all safety-sensitive duties
Evaluation required by a Substance Abuse Professional (SAP)
Completion of any SAP-recommended treatment or education
Negative return-to-duty test required before reinstatement
Mandatory follow-up testing program upon return
Ready to Schedule DOT Testing?
We come to your worksite. Fast, compliant, and accurate — get your team tested without the downtime.