What is the threshold for a positive DOT breath alcohol test?

For safety-sensitive employees under FMCSA rules, a breath alcohol concentration (BrAC) of 0.04% or higher is considered a violation. A BrAC between 0.02% and 0.039% requires removal from duty for at least 24 hours, but does not trigger the full SAP return-to-duty flow.

How is a breath alcohol test performed for DOT purposes?

A trained Breath Alcohol Technician (BAT) administers the test using a DOT-approved Evidential Breath Testing (EBT) device. The employee exhales into the device, which measures the alcohol concentration in the breath and converts it to a BAC equivalent.

How long after drinking can alcohol be detected on a breath test?

Detection times vary based on amount consumed, metabolism and other factors, but DOT-related breath tests may detect alcohol typically from about 12 to 24 hours after drinking depending on the situation.

Is breath alcohol testing the same as a blood test?

No. A breath alcohol test uses a breath sample and converts it to an estimated blood alcohol concentration (BAC). It is accepted under DOT programs when conducted with approved equipment and confirmed via an Evidential Breath Testing device.

What happens if a driver fails the DOT breath alcohol test?

If a safety-sensitive driver is confirmed at 0.04% BrAC or higher, they must be immediately removed from duty. They cannot return to safety-sensitive functions until they complete the return-to-duty process, including evaluation by a Substance Abuse Professional (SAP).

Breath Alcohol Test | DOT & Non-DOT Breath Alcohol Testing Nationwide

Breath Alcohol Testing Services

All prices shown are complete - no hidden fees

Consortium: $99.00/yr RTD Test: $149.95 Urine: from $79.95 Hair: from $114.95

DOT and non-DOT breath alcohol testing for current alcohol impairment, safety-sensitive workplaces, and transportation compliance programs.

What Is Breath Alcohol Testing?

Breath alcohol testing is used to determine current alcohol concentration and potential impairment. For DOT programs, breath alcohol testing must be performed using approved procedures and qualified Breath Alcohol Technicians.

goMDnow provides breath alcohol testing for DOT-regulated employers, CDL drivers, non-DOT workplace programs, post-accident testing, reasonable suspicion testing, random testing, return-to-duty testing, and follow-up testing.

When Breath Alcohol Testing Is Used

DOT and non-DOT employers commonly use breath alcohol testing for random testing, post-accident testing, reasonable suspicion testing, return-to-duty testing, follow-up testing, and workplace alcohol policies.

For DOT-regulated employees, alcohol testing rules are strict and documentation must be handled properly to remain compliant.

DOT Alcohol Testing Requirements

DOT alcohol testing must be performed by a qualified Breath Alcohol Technician (BAT) using an approved evidential breath testing device (EBT). Results must follow a two-step confirmation process and be properly documented.

DOT breath alcohol concentration (BAC) thresholds:

0.02

Screening threshold

A result of 0.02 or above triggers a confirmation test. Driver must stop safety-sensitive functions until confirmation.

0.04

Violation threshold

A confirmed result of 0.04 or above is a DOT violation. Driver is immediately removed from safety-sensitive duty and must complete the RTD process.

Important: A result between 0.02 and 0.039 is not a DOT violation but requires the driver to be removed from safety-sensitive duty for at least 24 hours. The employer must not allow the driver to return until a subsequent test shows below 0.02.

Why Use goMDnow for Breath Alcohol Testing?

Qualified BAT technicians at certified collection sites nationwide

DOT-approved procedures and evidential breath testing devices

Fast scheduling - same-day appointments at most locations

Proper documentation and result handling for audit compliance

DOT & non-DOT programs supported under one platform

Online ordering available 24/7 - no phone call required

Breath alcohol testing starts at $80.00. Can be combined with a urine drug test when both are required.

How It Works

1. Choose serviceSelect the DOT or non-DOT testing/compliance service you need.

2. Submit onlineComplete the order, enrollment, or request form with driver/employer details.

3. Use a nearby sitegoMDnow helps connect you with nationwide collection site access.

4. Stay compliantResults, documentation, and compliance support are handled according to the service type.

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Frequently Asked Questions

Can I order a breath alcohol test alongside a drug test?

Yes. Breath alcohol testing can be ordered together with a urine drug test when both are required - for example, for post-accident testing where DOT requires both a drug and alcohol test.

Is breath alcohol testing required for DOT programs?

Yes. DOT alcohol testing must be conducted using an evidential breath testing device (EBT) by a qualified Breath Alcohol Technician (BAT), following the two-step confirmation process required under 49 CFR Part 40.

What are the DOT breath alcohol concentration thresholds?

A result of 0.02 or above triggers a confirmation test and requires the driver to stop safety-sensitive functions. A confirmed result of 0.04 or above is a DOT violation requiring the full Return-to-Duty process.

What happens if an alcohol result is between 0.02 and 0.039?

A confirmed result between 0.02 and 0.039 is not a DOT violation but requires the driver to be removed from safety-sensitive duty for at least 24 hours. The employer must not allow the driver to return until a subsequent test shows below 0.02.

How much does a breath alcohol test cost?

Breath alcohol testing starts at $80.00 for consortium members. Testing can be combined with a urine drug test when both are required.

Where can I get a breath alcohol test done?

goMDnow provides access to over 25,000 certified collection sites nationwide with qualified BAT technicians. Same-day appointments are available at most locations. Tests can be ordered online 24/7.