--- title: "DOT Urine Drug Test: Complete Guide | AMH Nationwide" description: "This dot urine drug test guide explains the process, detection window, and who orders it. Call (877) 731-6362 for lab access and scheduling." author: "AMH Nationwide" date: "2026-08-27" tags: ["dot urine drug test guide"] canonical: "https://amhnationwide.com/dot-urine-drug-test-guide/" last_updated: "2026-08-27" --- # DOT Urine Drug Test: Complete Guide | AMH Nationwide **By AMH Nationwide** | August 27, 2026 This dot urine drug test guide explains the process, detection window, and who orders it. Call (877) 731-6362 for lab access and scheduling. --- The dot urine drug test guide explains federally regulated urine testing under 49 CFR Part 40 for safety-sensitive employees. It covers who orders the test, detection windows, and the collection process at nationwide labs. Call (877) 731-6362 to schedule your DOT urine drug test. OVERVIEW ## What is a DOT urine drug test? A DOT [urine](https://amhnationwide.com/urine-drug-testing/) drug test is a federally mandated urine drug screening used for safety-sensitive employees under the Department of Transportation regulations. It follows strict protocols detailed in [49 CFR Part 40](https://www.transportation.gov/odapc/part40) to ensure accuracy and chain-of-custody. The test screens for substances such as marijuana, cocaine, opiates, amphetamines, and PCP. WHO ORDERS ## Who requires a DOT urine drug test? Employers in safety-sensitive transportation roles order the DOT urine drug test to comply with federal regulations. This includes commercial truck drivers, bus drivers, pilots, railroad workers, and pipeline employees. The test is part of [pre-employment](https://amhnationwide.com/pre-employment-hair-testing/), random, post-accident, reasonable suspicion, [return-to-duty](https://amhnationwide.com/dot-return-to-duty/), and follow-up testing programs. Commercial motor vehicle operators Aircraft pilots and flight crew Railroad employees in safety roles Pipeline workers with safety responsibilities Transit and bus operators DETECTION ## What substances and detection window does the DOT urine drug test cover? The DOT urine drug test screens for five primary drug classes: marijuana (THC), cocaine, opiates, amphetamines, and PCP. The [detection window](https://amhnationwide.com/hair-follicle-drug-test-detection-window/) for most drugs in urine is typically 1 to 3 days after use, but some substances may be detectable longer depending on usage patterns and metabolism. | Drug Class | Typical Detection Window in Urine | | --- | --- | | Marijuana (THC metabolites) | 1 to 3 days (up to 30 days for chronic use) | | Cocaine metabolites | 1 to 3 days | | Opiates (morphine, codeine) | 1 to 3 days | | Amphetamines | 1 to 3 days | | PCP | 1 to 8 days | COLLECTION ## How is the DOT urine drug test collected? Collection for the DOT urine drug test follows a federally certified protocol under 49 CFR Part 40. It requires observed urine collection at certified collection sites to ensure specimen integrity and chain-of-custody. The collector verifies the donor’s identity, monitors the collection process, and secures the specimen with tamper-evident seals. Collection occurs at one of five national lab networks: [Quest Diagnostics](https://www.questdiagnostics.com/), [LabCorp](https://www.labcorp.com/), Omega Labs, United States Drug Testing Labs, or ExperTox Specimen temperature is checked immediately after collection All non-negative results are reviewed by a certified Medical Review Officer Strict chain-of-custody procedures are maintained throughout ## Schedule Your DOT Urine Drug Test Today Contact AMH Nationwide to receive your lab order and collection site information. Call (877) 731-6362 to begin compliance testing. [Call (877) 731-6362](tel:+18777316362)[Contact Us](https://amhnationwide.com/contact-us/) HOW TO START ## How do I get started with a DOT urine drug test? To initiate a DOT urine drug test, the employer or authorized requester contacts AMH Nationwide to obtain a lab order and directions to an appropriate collection site. AMH does not provide online ordering. Scheduling and test coordination are handled by calling (877) 731-6362. Test pricing varies by panel and detection window. RESULTS ## How are DOT urine drug test results processed and reported? After collection, specimens are sent to one of the five national lab networks for analysis using federally approved methods. Any initial positive or non-negative findings are reviewed by a certified Medical Review Officer (MRO) who may contact the donor for verification. Final results are reported to the employer or authorized requester following DOT guidelines. AMH Reviewed & Maintained By AMH Nationwide Customer Service AMH Nationwide is BBB A+ accredited and routes every order through Quest Diagnostics, LabCorp, Omega Labs, United States Drug Testing Labs, or ExperTox, all of which use multiple lab certification agencies and standards such as [SAMHSA](https://www.samhsa.gov/workplace/drug-testing)-aligned laboratory protocols, the ANSI National Accreditation Board for forensic testing and calibration, the College of American Pathologists (CAP), and Clinical Laboratory Improvement Amendments (CLIA). Every non-negative screen is reviewed by a certified Medical Review Officer as part of standard processing before a result is released, and chain-of-custody documentation is maintained on every collection. This page does not constitute medical or legal advice. **Last updated:** July 2026 You May Also Need [Nail Drug TestingNo head or body hair available? A 5-panel fingernail test covers a similar look-back window.Learn more →](https://amhnationwide.com/5-panel-fingernail-drug-test/)[ChildGuard: Environmental ExposureConcerned about a child or loved one? ChildGuard screens for exposure to drugs in their environment.Learn more →](https://amhnationwide.com/5-panel-hair-drug-test-environmental-exposure-childguard/)[Shorten the Detection WindowShortened options like 30 and 60 day hair panels are also available, useful when a urine test’s 1-3 day window is too short.Learn more →](https://amhnationwide.com/30-day-hair-drug-test/)[Hair ETG Alcohol TestAlso need alcohol testing? The hair ETG test screens for alcohol use, and can be added to the same collection.Learn more →](https://amhnationwide.com/etg-and-peth/) Frequently Asked Questions ## Common Questions No. DOT urine drug tests must be collected at federally certified collection sites partnered with one of the five national lab networks: Quest Diagnostics, LabCorp, Omega Labs, United States Drug Testing Labs, or ExperTox. AMH provides access to these labs. Typically, results are available within 24 to 72 hours after the lab receives the specimen. The Medical Review Officer may take additional time to review non-negative results before final reporting. No. Hair testing is not approved for DOT-regulated safety-sensitive testing. The DOT urine drug test under 49 CFR Part 40 is the required method. Any positive or non-negative result is reviewed by a Medical Review Officer who contacts the donor to verify legitimate medical explanations. Confirmed positive results are reported to the employer for further action. No. AMH does not offer online ordering or scheduling. To get started, call (877) 731-6362 to receive your lab order and collection site instructions. The DOT urine drug test covers five federally mandated drug classes: marijuana, cocaine, opiates, amphetamines, and PCP. Other drugs may require additional testing panels. Sources • [SAMHSA – Mandatory Guidelines for Federal Workplace Drug Testing Programs](https://www.samhsa.gov/workplace/drug-testing) • [U.S. DOT – 49 CFR Part 40 – Procedures for Transportation Workplace Drug and Alcohol Testing Programs](https://www.transportation.gov/odapc/part40) • [CDC – National Center for Health Statistics – Drug Use FastStats](https://www.cdc.gov/nchs/fastats/drug-use.htm) • [Quest Diagnostics – Employer Solutions, Hair Testing Methodology](https://www.questdiagnostics.com/) • [LabCorp – Occupational Testing Services](https://www.labcorp.com/) ## Ready to get started? AMH Nationwide provides the lab order and arranges collection nationwide. Every non-negative result reviewed by a certified Medical Review Officer. Call (877) 731-6362 or contact us. [Call (877) 731-6362](tel:+18777316362)[Contact Us](https://amhnationwide.com/contact-us/) --- **Need a drug, alcohol, HIV or STD test?** AMH Nationwide is a national lab testing agency operating since 2004, with more than 20,000 collection sites across the United States. Hair, urine, fingernail and blood testing, panels from 5 through 19, for individuals and employers. - Call: (877) 731-6377 - Find a collection site: https://amhnationwide.com/locations/ - Full page: https://amhnationwide.com/dot-urine-drug-test-guide/