Drug Testing for Construction Companies
Construction testing programs are driven less by law than by two other forces: what general contractors require for site access, and what happens after an incident. Both demand documentation you can produce on request.
Testing Requirements Usually Arrive Through Contracts
Most construction employers are not subject to a federal testing mandate for their general workforce. What they are subject to is the subcontract. General contractors and owners routinely require a drug-free workplace program as a condition of site access, and those requirements vary from one project to the next.
The practical consequence is that your program has to satisfy the strictest standard among your current projects, not the average. That is why a program built for one contractor's requirements tends to fail on the next job.
Need a program your GCs will accept?Five questions, about a minute. A specialist follows up within one business day.
Request a SpecialistPost-Accident Testing on a Jobsite
Construction has more post-accident testing than most industries, and more chances to do it badly. The rules to work within are clear enough: you may not use testing to retaliate against someone for reporting an injury, and testing to evaluate what caused an incident is permitted when it covers everyone whose conduct could have contributed.
What makes it work in practice is deciding the trigger in advance and giving foremen a short documentation form they can complete the same day. Three items matter most: what happened, who could have contributed, and which policy criterion was met.
The detail is on the post-accident testing page.
Crews That Move
A workforce that changes location by the week breaks programs built around a fixed collection site. The symptoms are familiar: random selections that go uncompleted, post-accident tests delayed until the next morning, and one crew that has not been tested in a year because their sites are always remote.
Where remote collection applies, it solves most of this. Where it does not, the answer is to plan coverage by region rather than assuming each superintendent will work it out.
Seasonal Hiring and Rehires
Construction hiring is cyclical, and rehiring the same people each season raises a question your policy should answer explicitly: does a returning worker get tested again, and does a prior test stay valid across a layoff? Leaving it unwritten produces inconsistency between crews, which is exactly the inconsistency that causes problems later.
Before your next project starts: read the testing clause in the subcontract, not the summary. The requirement is often more specific than anyone remembers, and it is easier to meet a standard you have actually read.
Common questions
General contractors require a testing program for site access. What do we need?
Usually three things: a written policy that meets the contractor's stated standard, evidence that covered workers were tested, and the ability to produce that evidence on request. The requirement normally lives in the subcontract or the site safety plan, so start by reading what you actually agreed to rather than assuming it matches the last contractor's rules.
Can we test after every incident on site?
Your policy should define the trigger objectively rather than leaving it to a foreman in the moment. OSHA's recordkeeping rule prohibits retaliating against employees for reporting injuries, and its 2018 interpretation made clear that most post-accident testing is permitted, including testing to evaluate the root cause of an incident, as long as everyone whose conduct could have contributed is tested rather than only the person who reported.
How do we test crews working an hour from anywhere?
This is the practical problem in construction. Sending a crew member to a collection site can cost most of a working day, so testing gets deferred and then skipped. Remote collection for non-regulated testing removes the travel, and where it does not apply the arrangement for that jobsite needs to be planned rather than improvised at 7am.
Do our drivers need different testing?
If any of them operate vehicles that fall under federal transportation rules, yes, and that testing follows its own procedures and must be kept separate from your company program. Many construction employers have a small number of covered drivers inside a much larger non-regulated workforce. See DOT compliance help if that applies.
What about workers from a staffing agency or a sub?
They are usually their employer's responsibility to test, but your site requirements still apply to them, and your subcontract should say who tests, to what standard, and who can be asked to prove it. Assuming everyone on site is covered by someone else's program is how gaps appear after an incident.
Testing That Keeps Crews on Site
Request a testing specialist
Answer five quick questions. There is no cost and no obligation.
Sources and review
- 29 CFR 1904.35 - Employee involvement (eCFR)
- OSHA - Clarification on post-incident drug testing (October 11, 2018)
- Florida Statutes 440.102 - Drug-free workplace program requirements
This page is general information about employer drug testing, not legal advice. Drug testing rules differ by state and by industry. Check with your own counsel before setting or changing a testing policy.