Drug and Alcohol Violations in FMCSA Investigations
When FMCSA investigates a motor carrier, some rule breaks count more than others. FMCSA calls them "acute" and "critical" violations, and they drive your safety rating. Many of them are drug and alcohol rules.
Updated September 28, 2026 · Checked against the federal regulations
How acute and critical violations are scored
Acute violations are so serious that FMCSA expects you to fix them right away, no matter how safe the rest of your operation is. Each acute violation found counts as one point.
Critical violations point to a breakdown in your management controls. They count when there is a pattern. A pattern is more than one violation, and it must be at least 10 percent of the records FMCSA checked.
Drug and alcohol rules (Part 382) fall in the Driver factor, along with Parts 383 and 391. A factor with 0 points is rated Satisfactory. One point makes it Conditional. Two or more points make it Unsatisfactory. Factor ratings then feed your overall safety rating.
Acute drug and alcohol violations
These are listed as acute in Appendix B to 49 CFR Part 385:
- 382.115(a) and (b): Not implementing a drug and alcohol testing program.
- 382.201: Using a driver known to have an alcohol concentration of 0.04 or higher.
- 382.211: Using a driver who refused a required test.
- 382.213(c): Using a driver known to have used a controlled substance.
- 382.215: Using a driver known to have tested positive for a controlled substance.
- 382.305(a): Not implementing a random testing program.
- 382.309: Using a driver who has not passed return-to-duty testing.
- 382.505(a): Using a driver within 24 hours after an alcohol result of 0.02 to less than 0.04.
- 392.4(b): Requiring or permitting a driver to drive while under the influence of, or in possession of, a drug that could make driving unsafe.
- 392.5(b)(1) and (b)(2): Requiring or permitting a driver to drive under the influence of or in possession of alcohol, or within 4 hours of drinking.
Critical drug and alcohol violations
These are listed as critical in Appendix B. They count against you when FMCSA finds a pattern:
- 382.301(a): Using a driver before receiving a negative pre-employment drug test result.
- 382.303(a) and (b): Not doing post-accident alcohol or drug testing.
- 382.305(b)(1) and (b)(2): Not meeting the minimum annual random testing rates for alcohol and drugs.
- 382.503: Letting a driver return to safety-sensitive work after a violation without a SAP evaluation.
- 382.605: Not giving at least six unannounced follow-up tests in the first 12 months after return to duty.
The most-cited drug and alcohol violations
FMCSA's public A&I Online data lists the most-cited violations in federal and state investigations. For calendar years 2022 through 2026 (data as of August 28, 2026), four drug and alcohol rules were in the national top 10.
The two Clearinghouse query rules are not on the acute or critical list. They are still violations, and investigators cite them often.
- #2 overall, 382.701(a): Failing to run a pre-employment Clearinghouse query (18,551 violations).
- #4 overall, 382.701(b)(1): Failing to run an annual Clearinghouse query (16,894 violations).
- #8 overall, 382.301(a): Using a driver before receiving a pre-employment result (7,361 violations).
- #9 overall, 382.711(b): Failing to register in the Clearinghouse (7,111 violations).
How to avoid these findings
Most of these violations come from missing paperwork or skipped steps, not from bad intent. A simple checklist helps.
Pact Compliance helps small fleets keep testing, random selections, and Clearinghouse queries on schedule.
- Register your company in the Clearinghouse.
- Get a negative pre-employment drug result before a new driver performs any safety-sensitive work.
- Run a full Clearinghouse query before hire and a query on every driver at least once a year.
- Keep all drivers in a random pool that meets the annual rates.
- Test after qualifying accidents, and document why if a test could not be done.
- Never let a driver with a violation return until the SAP and return-to-duty steps are done.
Common questions
What is an acute violation?
A violation so severe that FMCSA requires immediate correction, regardless of the carrier's overall safety posture. Each one found counts as one point.
What is a critical violation?
A violation tied to management or operational controls. It counts as one point when there is a pattern: more than one violation and at least 10 percent of records examined.
Can one drug and alcohol violation affect my safety rating?
Yes. One acute violation puts one point on the Driver factor, which makes that factor Conditional. Two or more points make it Unsatisfactory.
Is failing to run a Clearinghouse query acute or critical?
No. 382.701 is not on the acute and critical list in Appendix B to Part 385. But it is one of the most-cited violations in FMCSA investigations.
Where does FMCSA publish violation data?
On its Analysis & Information (A&I) Online site, which has a Safety Investigations Violations report you can filter by year, state, and violation type.