--- title: "What jobs do hair drug test" description: "Discover what jobs do hair drug test and the benefits of hair follicle drug testing. Learn detection windows and testing facts. Call (877) 731-6362 today." author: "AMH Nationwide" date: "2026-08-28" tags: ["what jobs do hair drug test", "what jobs do hair drug test | what jobs do hair follicle drug test | what jobs do hair follicle drug testing"] canonical: "https://amhnationwide.com/what-jobs-do-hair-drug-test/" last_updated: "2026-08-28" --- # What jobs do hair drug test **By AMH Nationwide** | August 28, 2026 Discover what jobs do hair drug test and the benefits of hair follicle drug testing. Learn detection windows and testing facts. Call (877) 731-6362 today. --- What jobs do hair drug test? Hair drug testing is commonly used for safety-sensitive, long-term, and high-security positions due to its extended detection window and accuracy. Jobs in transportation, law enforcement, and government often require hair follicle drug testing. Call (877) 731-6362 for more information or to schedule testing. OVERVIEW ## What jobs do hair drug test? Hair drug testing is primarily used in jobs where long-term substance use history is critical. These jobs often involve safety-sensitive roles or high-security environments where employers need reliable detection of past drug use. Typical jobs that require hair follicle drug testing include law enforcement, federal government positions, certain healthcare roles, and some corporate security jobs. Hair testing is favored because it can detect drug use up to 90 days prior, unlike [urine](https://amhnationwide.com/urine-drug-testing/) tests that detect recent use only. Law enforcement officers Federal government employees Transportation and logistics roles (non-DOT regulated) Healthcare professionals Corporate security and executive roles Employers in these fields choose hair drug testing to ensure workplace safety and compliance with regulations. Hair follicle drug testing is not mandated for DOT safety-sensitive positions, which require federally certified urine testing under [49 CFR Part 40](https://www.transportation.gov/odapc/part40). However, hair testing is commonly used for non-DOT roles. [DETECTION WINDOW](https://amhnationwide.com/hair-follicle-drug-test-detection-window/) ## How long does hair follicle drug testing detect drug use? Hair follicle drug testing detects drug metabolites deposited in the hair shaft over time, providing a detection window of up to 90 days, sometimes longer depending on hair length. This contrasts with urine testing, which typically detects drug use within a few days. The extended detection window makes hair testing useful for employers who want a comprehensive history of substance use rather than recent or one-time usage. However, hair testing cannot determine exact timing or frequency of use within the detection window. Detection window: up to 90 days or more Detects chronic and repeated drug use Not effective for detecting use within hours or a few days Less susceptible to adulteration or substitution compared to urine testing Because of this long detection window, hair follicle drug testing is often used in [pre-employment](https://amhnationwide.com/pre-employment-hair-testing/) screening, random testing, and post-incident investigations for positions where safety and security are paramount. TESTING PROCESS ## How is hair follicle drug testing conducted? Hair follicle drug testing involves collecting a small sample of hair, usually from the scalp, which is then sent to one of AMH Nationwide’s five national lab networks: [Quest Diagnostics](https://www.questdiagnostics.com/), [LabCorp](https://www.labcorp.com/), Omega Labs, United States Drug Testing Labs, or ExperTox. The collection is performed at designated collection sites after the lab order is issued by AMH Nationwide. There is no online ordering. After collection, the sample undergoes laboratory analysis, and any non-negative results are reviewed by a certified Medical Review Officer (MRO) to ensure accuracy and validity. Hair sample collected from scalp (about 1.5 inches) Sample sent to one of five national labs Non-negative tests reviewed by a certified Medical Review Officer Testing complies with [SAMHSA](https://www.samhsa.gov/workplace/drug-testing), CAP, and CLIA standards This process ensures reliable and legally defensible results for employers and individuals. Hair testing requires no special preparation but cannot detect drug use within the past week due to the time it takes for hair to grow out. WHO ORDERS IT ## Who typically orders hair follicle drug testing? Hair follicle drug testing is ordered by employers, courts, [probation](https://amhnationwide.com/hair-follicle-drug-test-probation/) officers, and sometimes individuals seeking comprehensive drug use history. Employers in safety-sensitive industries or high-security roles often require this testing as part of pre-employment screening or ongoing compliance. Courts and probation departments may use hair testing to monitor abstinence over a longer period. Individuals may also request hair testing for personal reasons or to satisfy legal or administrative requirements. Employers in law enforcement, government, healthcare, and corporate sectors Court systems and probation services Individuals needing verified drug testing history AMH Nationwide facilitates the lab order and directs clients to the nearest collection site. Phone consultation is necessary to initiate testing. ## Need Hair Follicle Drug Testing? Call (877) 731-6362 to discuss your hair drug testing needs, schedule a collection, or get detailed information about detection windows and testing procedures. [Call (877) 731-6362](tel:+18777316362)[Contact Us](https://amhnationwide.com/contact-us/) TEST ACCURACY ## How accurate and reliable is hair follicle drug testing? Hair follicle drug testing is highly accurate when performed by accredited labs such as those partnered with AMH Nationwide. The testing detects drug metabolites embedded in the hair shaft, minimizing the risk of tampering or adulteration. Every non-negative result undergoes review by a certified Medical Review Officer to confirm the findings and rule out false positives. This review adds an additional layer of reliability to the testing process. Use of five nationally accredited labs ensures standardized testing MRO review of all non-negative results Hair testing is less prone to adulteration than urine tests Results are SAMHSA-aligned and CAP/CLIA certified Employers and individuals can trust hair follicle drug testing for dependable, long-term drug use detection. However, it is not suitable for DOT-regulated safety-sensitive testing, which requires federally certified urine protocols. LIMITATIONS ## What are the limitations of hair follicle drug testing? Hair follicle drug testing cannot detect drug use within the past 7 days because hair must grow out to show metabolites. It also cannot specify exact dates or frequency of drug use within the detection window. Additionally, some hair types or treatments can affect test results, though labs account for these variables. Hair testing is not accepted for DOT safety-sensitive roles due to regulatory requirements mandating urine testing under 49 CFR Part 40. No detection of drug use within the past week Cannot pinpoint exact timing or frequency of use Some hair treatments may interfere but are considered in analysis Not accepted for DOT-regulated safety-sensitive testing Employers should consider these limitations when choosing hair follicle drug testing and consult AMH Nationwide for guidance on appropriate testing methods. 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-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 Hair follicle drug testing detects drug metabolites deposited over time, so it is more effective at identifying repeated or chronic use rather than a single instance. One-time use may not always be detected, especially if it occurred shortly before sample collection. Passive exposure is unlikely to cause a positive hair drug test because the testing detects metabolites inside the hair shaft, not just external contamination. The lab process includes washing steps to remove external contaminants. No. DOT safety-sensitive testing requires federally certified urine testing under 49 CFR Part 40. Hair follicle testing is not accepted for these roles but may be used for non-DOT positions. Typically, results from hair drug tests are available within 3 to 7 business days after sample collection, depending on the lab and testing panel. AMH Nationwide provides guidance on expected turnaround times. Certain hair treatments can affect drug metabolite concentrations, but accredited labs account for this during analysis. It is important to disclose any recent hair treatments during collection to ensure accurate interpretation. AMH Nationwide does not offer online ordering. To schedule hair follicle drug testing, call (877) 731-6362 to obtain a lab order and be directed to a nearby collection site. Collection is performed at authorized locations only. 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/what-jobs-do-hair-drug-test/