Joints for sale at Mr. Bill’s of Buckley, the first recreational marijuana store to open in Pierce County outside of Tacoma, are shown in September 2014.
Joints for sale at Mr. Bill’s of Buckley, the first recreational marijuana store to open in Pierce County outside of Tacoma, are shown in September 2014. Peter Haley Staff photographer
Joints for sale at Mr. Bill’s of Buckley, the first recreational marijuana store to open in Pierce County outside of Tacoma, are shown in September 2014. Peter Haley Staff photographer

Puff test for pot use will be reality within a year, WSU researchers say

October 22, 2015 12:54 AM

More Videos

  • Take a tour of the Quest Diagnostics laboratory in west Olympia

    Drug testing companies, including Quest Diagnostics, use urine tests that seek evidence of past marijuana use — carboxy THC.