What does “ng/mL” mean on my drug test?

uTest THC 50 ng/ml

What does an ng/mL level mean on my drug test?

A “ng/ml” stands for nanograms per milliliter. It is used by labs as a unit of measure (of density) for test results. Specifically, for our customers, it is used for drug testing results.

Who came up with these levels for each drug?


The Substance Abuse and Mental Health Services Administration (SAMHSA) is the agency within the U.S. Department of Health and Human Services.  http://www.samhsa.gov/

How did SAMSHA determine these levels?

SAMSHA considers positive results above the standard ng/mL level abuse, more than a one-time use.

What level are UTest drug testing kits?

All of our drug tests we sell are of the same level as a lab-based test. We also carry a few testing devices that can detect at even lower levels than the standardized lab tests.

Why do these levels concern you as a customer?

It’s important to do your research and make sure that any drug test you buy meets the standard levels of a lab test. If you do not buy a test that meets the standard level or is lower than the standard level of a lab, you run the risk of testing positive (dirty) when you go in for a standardized test.

Still have more questions?
Check out our FAQs