Employer question: How should an employer structure a random drug testing program?
An employer should begin by identifying which employees are covered, separating DOT and non-DOT programs, defining the selection process, and documenting how collections and results will be coordinated. DOT-regulated employers must follow specific federal requirements. Non-DOT programs should be based on a clear written policy and applicable state and local requirements.
The program should also define responsibilities. The employer or its service agent manages the random pool and selections. The collection provider supports the collection process. The laboratory, Medical Review Officer, and third-party administrator perform their respective functions when applicable.
DOT random testing and non-DOT random testing are different programs
DOT and non-DOT testing may both be part of an employer’s workforce program, but they cannot be treated as one program.
A DOT random testing program applies to employees covered by a DOT agency’s regulations. For motor carriers, this commonly includes drivers who perform safety-sensitive functions and are subject to FMCSA requirements. The DOT program must use the required procedures, forms, testing processes, and reporting structure.
A non-DOT random testing program is established by the employer. It may cover positions that are not subject to DOT testing, such as non-CDL drivers, warehouse employees, manufacturing personnel, or other safety-sensitive workers. The employer’s policy should define the scope and process.
The two programs should maintain separate:
- Employee pools
- Selection records
- Testing designations
- Collection instructions
- Forms and documentation
- Result reporting processes
Non-DOT testing cannot be reported as DOT testing or used to represent that a DOT requirement has been met. The U.S. Department of Transportation addresses this relationship in 49 CFR Part 40 guidance, including the distinction between DOT and non-DOT tests.
For a more detailed comparison, review DOT vs. non-DOT drug testing.
What DOT rules require
For FMCSA-regulated employers, the 2026 minimum annual random testing rates are:
- Controlled substances: 50% of the average number of covered driver positions
- Alcohol: 10% of the average number of covered driver positions
These rates are published by the USDOT Office of Drug and Alcohol Policy and Compliance in its 2026 random testing rates table. The FMCSA rates did not change for 2026.
The rates are annual minimums. They apply to DOT-covered employees and should not be applied automatically to non-DOT employees.
Under 49 CFR 382.305, DOT random testing must meet several requirements:
- Scientifically valid selection: Employers must use a scientifically valid method, such as a computer-based random number generator matched to employee identification numbers.
- Equal selection opportunity: Each covered driver must have an equal chance of being selected each time selections are made.
- Testing during the selection period: Each selected driver must be tested during the applicable selection period.
- Unannounced testing: Employees should not receive advance notice of selection.
- Reasonable distribution: Selection and collection dates should be spread reasonably throughout the calendar year.
- Prompt response: A driver notified of selection must proceed to the collection site as directed. If the driver is performing a safety-sensitive function other than driving, the employer must address the work assignment before sending the driver for testing.
- Alcohol timing: A driver may be tested for alcohol only while performing safety-sensitive functions, just before performing them, or just after completing them.
The FMCSA also provides guidance on specific workforce situations. Part-time CDL drivers must be included in the DOT random pool. A company with more than one covered CDL driver may manage its own program. A single-driver operation that is not leased to another carrier generally must place the driver in a consortium for random testing purposes.
An alternate driver should be selected only when the originally selected driver will not be available for the entire selection period, such as during a long-term absence, illness, injury, layoff, or vacation. Multi-location employers may select by terminal if they use a two-stage method that gives each employee in the overall pool an equal chance of selection.
If a driver is subject to more than one DOT agency’s rules, the applicable annual rate generally follows the agency regulating more than 50% of that driver’s safety-sensitive work. Employers subject to multiple DOT agencies may establish separate pools by rate or use the highest applicable rate, as allowed by the regulation.
How employers calculate and maintain a random testing pool
The pool is the foundation of the program. Employers should first identify every covered employee and confirm that the list remains current.
For an FMCSA program, the pool should include:
- All covered CDL drivers
- Part-time covered CDL drivers
- Only employees who are subject to the DOT testing requirement
- Drivers assigned to the employer’s applicable DOT program
Non-CDL employees should not be added to the DOT random pool. An employer may test those employees under a separate non-DOT program, but the testing must not be described as a DOT test.
The employer calculates the average number of covered driver positions by adding the number of covered drivers eligible during each random testing period and dividing the total by the number of periods. If random testing occurs more often than monthly, the employer does not need to recalculate the total more than once per month.
The employer may manage selections directly or use a service agent, such as a consortium or third-party administrator. Even when a service agent performs the selections, the employer remains responsible for ensuring that the pool includes only covered employees and that testing occurs at the applicable percentage.
A practical recordkeeping process should track:
- The employee’s DOT or non-DOT status
- The date the employee entered or left the pool
- The testing period
- The selection result
- Whether the collection occurred during the required period
- The applicable testing category
- Any required documentation or follow-up
Selection records should be maintained separately from collection records. This separation helps the employer, service agent, collection provider, laboratory, and MRO identify their respective responsibilities.
What a non-DOT random testing policy should define
Non-DOT random testing is employer-directed. It does not use the FMCSA random rates unless the employer independently chooses a similar structure for policy reasons.
Before implementation or revision, the employer should review its policy and applicable state or local requirements with qualified legal counsel. Requirements may vary based on the workforce, location, industry, collective bargaining obligations, privacy considerations, and the type of testing being conducted.
A non-DOT policy should define:
- Covered positions: Identify the job categories included in the program.
- Testing circumstances: State when random testing may occur and whether the program includes drugs, alcohol, or both.
- Testing panel: Identify the panel and any employer-specific instructions.
- Specimen instructions: State whether the program uses urine, hair, oral fluid, or another approved collection method.
- Selection process: Explain how employees are selected and how equal treatment is maintained.
- Authorization: Identify who may authorize a test and who may communicate the selection.
- Collection process: Define where employees report and what information the collection provider receives.
- Result handling: Identify who receives results and how results are reviewed.
- Confidentiality: Establish access controls, documentation standards, and retention procedures.
- Employee notice: Provide the policy and any required notices before the program begins.
Employers should avoid changing the panel, selection method, or covered positions informally. A defined policy can help support consistent administration and reduce confusion when employees work across locations or job classifications.
Common program mistakes employers can avoid
Several errors create avoidable administrative problems.
Mixing DOT and non-DOT pools. This is one of the most important errors to avoid. Non-CDL or other non-DOT employees should not be placed in a DOT random pool. Separate pools and separate testing designations are required.
Leaving part-time covered drivers out. A covered driver does not become exempt from the DOT pool because the position is part-time.
Using a non-random selection process. Selecting employees based on supervisor preference, recent performance, work location, or convenience may undermine the required random process.
Clustering tests in one period. DOT random tests should be distributed reasonably throughout the calendar year rather than concentrated at year-end.
Using alternates too freely. An alternate should not replace a selected employee simply because the collection is inconvenient. The original employee generally must be unavailable for the entire selection period.
Failing to identify the testing designation. The employer should clearly state whether the collection is DOT or non-DOT before the employee reports.
Assuming the collection provider manages the pool. Ford Occupational Health provides collection support. Pool administration and random selection remain the responsibility of the employer or its service agent.
Clinic, scheduled group, and mobile collection options
A random testing program should include a practical collection workflow. The best option depends on employee locations, workforce size, privacy requirements, scheduling, and operational demands.
Ford Occupational Health provides DOT and non-DOT drug and alcohol testing collection support for random, pre-employment, post-accident, reasonable suspicion, return-to-duty, follow-up, and other approved testing reasons.
Employers may coordinate:
- Clinic collections: Employees report individually to the designated clinic.
- Scheduled group collections: Multiple employees are assigned a defined collection block.
- Mobile collections: A collection team may be arranged at an employer site when the service, location, workspace, and scheduling requirements are appropriate.
Mobile occupational health services may help reduce employee travel and limit disruption for distributed crews or larger workforces. Employers should provide the service type, employee count, location, site conditions, employer contact, forms, testing instructions, and reporting expectations before scheduling.
The FOH Employer Portal can also support employer-directed service requests and workforce coordination.
Ford Occupational Health provides collection support only. FOH is not the employer’s laboratory, Medical Review Officer, or third-party administrator. Those functions remain with the applicable program participants.
Houston-area industries that commonly use random testing programs
Random testing programs may be relevant to employers with safety-sensitive, regulated, or physically demanding workforces. In Greater Houston, Katy, West Houston, and surrounding Houston-area communities, common examples include:
- Transportation and trucking companies with covered CDL drivers
- Construction contractors and infrastructure crews
- Manufacturing and industrial operations
- Warehouses and logistics employers
- Oil, gas, and related field-service organizations
- Government contractors and public-sector operations
- Skilled-trade employers with equipment or vehicle responsibilities
- Healthcare and other organizations with employer-defined safety policies
Each employer should determine which positions are covered and which program requirements apply. Some organizations may need a DOT program, a non-DOT program, or both.
For broader workforce coordination, review occupational health services for Houston employers and employer occupational health services.
Frequently asked questions
Can non-CDL employees be included in a DOT random pool?
No. FMCSA guidance states that non-CDL employees may not be included in the DOT random pool. An employer may test them through a separate non-DOT program, subject to the employer’s policy and applicable requirements.
Are part-time CDL drivers included in the DOT random pool?
Yes. Covered part-time CDL drivers must be included in the DOT random pool.
Can an employer use the same random pool for DOT and non-DOT employees?
No. DOT and non-DOT employees must remain in completely separate programs and pools. Non-DOT results cannot be reported as DOT tests.
Who manages the random selection process?
The employer or the employer’s service agent manages the pool and selection process. A collection provider supports the collection but does not assume responsibility for pool administration.
Can random collections be completed at the employer’s location?
They may be arranged through a mobile collection option when the location, workspace, workforce size, requested service, and scheduling requirements support on-site delivery.
Request employer services
A structured random testing program begins with a clear employee population, testing designation, selection process, and collection workflow. Employers in Houston, Katy, West Houston, and surrounding communities can describe their workforce, locations, testing needs, and administrative structure to identify an appropriate next step.
Request Employer Services for clinic, scheduled group, or mobile collection support.