FMCSA Drug and Alcohol Clearinghouse: What Employers and Collectors Need to Know
The federal database that every CDL employer must query — and every certified DOT collector feeds into. Here's what gets reported, who can see it, and what role a certified collector plays at every stage.
Cedar & Crown Collector Academy · Compliance & Risk
Quick Answer
The FMCSA Drug and Alcohol Clearinghouse is a federal database that records drug and alcohol violations for CDL holders and other CMV operators. Employers must query it before hiring and annually for all current drivers. All violations must be reported within 2–3 business days depending on violation type.
What Is the FMCSA Drug and Alcohol Clearinghouse?
The FMCSA Drug and Alcohol Clearinghouse (officially the Commercial Driver's License Drug and Alcohol Clearinghouse) was established by FMCSA final rule in December 2016 and became effective on January 6, 2020. It is a secure online database administered by FMCSA at clearinghouse.fmcsa.dot.gov.
Before the Clearinghouse existed, an employer could hire a CDL driver who had tested positive at a previous job without ever knowing. The driver simply didn't mention it. The Clearinghouse closed that gap by creating a centralized, real-time record of violations that employers must consult before putting a CDL driver behind the wheel.
Who it covers
CDL (Commercial Driver's License) holders, CLP (Commercial Learner's Permit) holders, and non-CDL FMCSA-regulated drivers operating CMVs in safety-sensitive functions.
What it records
Positive drug tests, refusals to test (including adulterated and substituted specimens), §382.307 reasonable suspicion determinations, §382.303 post-accident violations, and actual knowledge violations.
Who administers it
FMCSA. Employers, C/TPAs, MROs, SAPs, and SDLAs (State Driver Licensing Agencies) all interact with the Clearinghouse through their registered accounts at clearinghouse.fmcsa.dot.gov.
Why it matters for collectors
Every drug test that results in a Clearinghouse entry starts with a certified DOT collector completing a proper chain-of-custody procedure. The collection is the foundation of the record.
What Gets Reported to the Clearinghouse?
Six categories of information are reportable to the Clearinghouse, each with its own responsible reporting party and timeframe. Employers, MROs, C/TPAs, and SAPs all play reporting roles — and the timelines are strictly enforced.
| Violation Type | Who Reports | Timeframe |
|---|---|---|
| Positive drug test | MRO | Within 2 business days after final result |
| Refusal to test (including adulterated/substituted specimens) | MRO or C/TPA | Within 2 business days after refusal determination |
| Actual knowledge (on-duty use, BAC ≥0.04, post-accident alcohol use) | Employer/DER | Within 3 business days |
| RTD (Return-to-Duty) completion | SAP | Within 2 business days |
| Follow-up testing completion | C/TPA | Within 2 business days of last follow-up test |
| Negative return-to-duty test result | Employer or C/TPA | Within 2 business days |
Reporting timelines are measured in business days, not calendar days. Missing a reporting deadline is itself a violation. C/TPAs often manage the reporting obligations for employers who contract out their testing program management.
Who Can Query the Clearinghouse?
The Clearinghouse is not public. Access is limited to registered parties with a legitimate regulatory purpose:
Employers (prospective and current)
Must run a full pre-employment query before a CDL driver's first safety-sensitive duty. Must run a limited annual query for every current CDL driver at least once per calendar year. C/TPAs may query on behalf of registered employers.
Drivers
Can view their own Clearinghouse record at any time by logging into their registered account. Must provide electronic consent before an employer can run a full query that reveals detailed violation information.
SAPs (Substance Abuse Professionals)
May run a limited query to verify that a driver has an open prohibition before initiating the return-to-duty evaluation. SAPs cannot see the full violation record.
State Driver Licensing Agencies (SDLAs)
Phased access began in 2023. SDLAs use Clearinghouse data to downgrade or revoke CDLs when a driver has an unresolved violation — preventing a prohibited driver from simply renewing their CDL at the state level.
Law enforcement
Limited access for enforcement purposes. Law enforcement agencies cannot see the full violation record but can confirm whether a driver has a current Clearinghouse prohibition.
Full Query vs. Limited Query: What's the Difference?
Employers conduct two types of Clearinghouse queries, each serving a distinct compliance function. Using the wrong query type — or failing to use either — creates a compliance gap.
Full Query
Pre-employment · Requires driver consent
- →Reveals all violations and current prohibitions in the driver's record
- →Requires the driver's electronic consent through the Clearinghouse portal
- →Must be run before the driver's first safety-sensitive duty
- →Cannot be substituted by the annual limited query
Limited Query
Annual · Current employees only
- →Confirms only whether a record exists — does not reveal violation details
- →Does not require individual driver consent, but employer must notify drivers of the annual query policy
- →Must be run at least once per calendar year for every current CDL driver
- →If a record is found, employer must follow up with a full query (requires driver consent)
Consequence of skipping either query: Under §382.701, an employer who permits a CDL driver to operate a CMV without completing the required Clearinghouse query faces FMCSA enforcement action. The driver cannot legally operate for you until the query is on file.
The Collector's Role
Every Clearinghouse Entry Starts With a Certified Collector
Every positive test, refusal, and return-to-duty test that lands in the Clearinghouse started with a certified DOT collector completing a proper chain-of-custody procedure under 49 CFR §40.33. If the collection is procedurally defective, the test result can be cancelled — and a cancelled test cannot be reported to the Clearinghouse.
Collections that feed the Clearinghouse must be conducted by certified DOT collectors (§40.33) — no exceptions.
An employer who discovers a Clearinghouse violation and initiates the RTD process needs a certified collector for the RTD specimen (directly observed per §40.67) and every follow-up test (all observed, minimum 6 over 12 months per §40.307).
Collectors who work with C/TPAs and TPAs are dispatched specifically for these high-stakes RTD and follow-up collections — they are the most consequential collections in the DOT system.
What If a Violation Is Reported in Error?
Clearinghouse entries can be corrected — but the process has specific rules depending on who made the error.
The driver logs into the Clearinghouse and submits a dispute through the DataQ system. FMCSA reviews the dispute and notifies the reporting party (MRO, employer, or C/TPA), who must respond within 14 days. FMCSA issues a determination. The violation's effect is not suspended during the review.
If the employer entered an actual-knowledge violation in error, they can submit a withdrawal through their Clearinghouse account. The withdrawal must include documentation explaining why the original report was incorrect.
An MRO who reported a positive result in error (for example, if the wrong test result was entered) can submit a correction through the Clearinghouse. The MRO must document the basis for the correction in the MRO's records.
Employer Clearinghouse Compliance Checklist
Use this checklist to verify your company's Clearinghouse compliance program covers every required element:
Register with the Clearinghouse at clearinghouse.fmcsa.dot.gov (required before January 6, 2020 — if you haven't registered, do it now)
Run a full pre-employment query on every CDL hire before their first safety-sensitive duty (requires driver's electronic consent)
Run a limited annual query for every current CDL driver at least once per calendar year (no individual consent needed, but a written annual query policy is required)
Report any actual-knowledge violations within 3 business days of observation
Designate a DER or C/TPA to manage Clearinghouse registration, queries, and reporting obligations
3 Clearinghouse Compliance Mistakes That Expose Employers
These are the most common — and most costly — Clearinghouse errors that FMCSA compliance auditors cite. None of them require bad intent; they happen through procedural gaps.
Mistake 1: Hiring before querying
§382.701 requires a Clearinghouse query before a CDL driver operates any CMV for you. The query must happen before the first safety-sensitive duty — not after onboarding paperwork, not pending the query result, before. "We were short-staffed" is not a regulatory defense. FMCSA fines apply per driver, per violation.
Mistake 2: Skipping the annual limited query
Even if you ran a full pre-employment query at hire, annual limited queries are separately required for all current CDL drivers. These are not the same query. The annual limited query must be run at least once per calendar year for every CDL driver on your roster — even the ones who have never had a violation.
Mistake 3: Forgetting to report actual knowledge
If you observe a driver with a BAC ≥0.04, using alcohol within 4 hours of duty, or using drugs on duty, you are legally required to report that actual knowledge violation to the Clearinghouse within 3 business days. This is not optional. Employers who fail to self-report actual knowledge violations face the same FMCSA enforcement exposure as the underlying conduct.
For a deeper look at the post-accident testing obligations that feed the Clearinghouse, see our guide on DOT post-accident drug testing requirements. For reasonable suspicion obligations, see what is reasonable suspicion DOT testing.
Frequently Asked Questions
Is the FMCSA Clearinghouse the same as a background check?
No. The Clearinghouse only contains DOT drug and alcohol violations, not criminal records or driving history. It is entirely separate from MVR (Motor Vehicle Record) checks. An employer conducting a standard background check will not see Clearinghouse data — a separate Clearinghouse query is required before any CDL driver can operate a CMV for your company.
What happens if a driver has a Clearinghouse violation?
A driver with an unresolved Clearinghouse violation is prohibited from operating a CMV in a safety-sensitive function. The employer must immediately remove them from all safety-sensitive duties. The driver can only return after completing the full return-to-duty (RTD) process: SAP evaluation, prescribed treatment or education program, and a negative RTD test administered by a certified DOT collector.
Do all DOT agencies use the Clearinghouse?
No. The FMCSA Drug and Alcohol Clearinghouse covers only FMCSA-regulated employers — trucking companies, bus carriers, and passenger carriers operating commercial motor vehicles. The FRA (railroads), FAA (aviation), FTA (transit), PHMSA (pipeline/hazmat), and USCG (maritime) each have separate violation tracking systems. A violation in the FMCSA Clearinghouse does not automatically appear in any other agency's system.
How long do violations stay in the Clearinghouse?
Violations remain accessible in the Clearinghouse for 5 years from the date of the violation, or until the driver completes the RTD process — whichever is later. After 5 years and completion of the RTD process, the record is archived rather than deleted. Archived records are removed from standard pre-employment and annual queries but are retained by FMCSA.
Can a driver dispute a Clearinghouse entry?
Yes. Drivers can submit a DataQ request through FMCSA to dispute an inaccurate Clearinghouse entry. Once a dispute is filed, the entity that made the entry (MRO, employer, or C/TPA) must respond within 14 days. FMCSA reviews the dispute and issues a determination. If the entry is found to be incorrect, it is corrected or removed. The dispute process does not suspend the violation's effect while the review is pending.
The Collections That Feed the Clearinghouse Require a Certified Collector
Every positive result, refusal, and RTD test that lands in the FMCSA Clearinghouse started with a certified DOT collector completing a proper chain-of-custody procedure. Cedar & Crown Collector Academy certifies you to conduct those collections for $99.
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