Testing Services: Overview
When choosing a test that's best for you, consider these 5 factors:
01
The substances that need to be detected
02
Desired detection window
03
Specimen type
04
Level of adulteration potential
05
Notice required before collection

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Specimen Types Tested
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Trailblazing Developments
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Years Operating
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On-Time TAT
Testing Services
Environmental Exposure: Hair Testing
Hair Testing
~3 month detection window, simple to collect, difficult to adulterate, non-biohazard specimen.
Fingernail Testing
Meconium Testing
Umbilical Cord Tissue Testing
PEth / Dried Blood Spot
Instant Testing
Certifications & Accreditations




Forensically Defensible Testing You Can Trust
Experienced Experts
Our leading experts bring decades of specialized knowledge to strengthen cases and provide authoritative insights.
Reliable Results
Whether for legal, occupational, or compliance contexts, you can count on results that hold up under scrutiny.
Forensically Sound Testing
All testing follows strict forensic protocols with full chain of custody and confirmatory analyses on positives to ensure defensibility.
Find A Collection Site
Whether you’re visiting us in person or simply want to know where we’re based, here’s some helpful information about our location

Ready to Partner with USDTL?
For over 25 years, USDTL has delivered accurate, reliable laboratory testing services across 200 locations nationwide. From hospitals to government agencies to employers, we partner with organizations that demand precision.

























