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Which number actually matters
Standard federal cutoff for initial screening - used for DOT and most workplace screenings.
Lab confirmation cutoff. It's only run if you fail the standard test.
Some employers set a lower cutoff - worth asking whoever arranged your test.
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Estimates are based on peer-reviewed toxicology research and population averages. Individual results vary by physiology, hydration, metabolism, and testing conditions. This tool is informational only and is not medical or legal advice.
*50 ng/mL is the common federal initial screening cutoff; 15 ng/mL is the confirmation cutoff used after a non-negative initial screen.
