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50 nanograms of THC metabolites per milliliter defines a "presumptive positive" by NIDA (National Institute on Drug Abuse) certified labs. So, to pass the test, you don't need to have absolutely clean urine - you need to have less than 50 ng/ml of THC in your urine. Found this information here: http://best4drugtest.com/_passthctest.html

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16y ago

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In urine testing, a THC level of 50 ng/mL or higher is generally considered positive for marijuana use. Levels below this threshold are typically considered negative.

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10mo ago
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Q: How much THC is considered a high level in urine testing?
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