The October 16 article also examines the geographic differences illustrating that the western United States has a much higher instance of drug use than the rest of the country. Specifically, Hawaii had the most prevalent use of methamphetamines at 410% greater than the national average. The Quest Diagnostics Drug Testing Index™ is regarded as the industry standard for measuring and reporting workforce drug use. It is published as a public service for government, media and industry and has been considered a benchmark for national trends since its inception in 1988. To review the Drug Testing Index™ published in October 2011, click here. For more information about drug testing, visit our website.