Intelligence collected by the United States Drug Enforcement Administration shows that methamphetamine use is higher in the Western portion of the country.
Based on data collected at arrests, 42.9 percent of males arrested in Sacramento, California tested positive for meth. In Portland, Oregon, 22.9 percent of men arrested had meth in their system. In Denver, Colorado, the percent dropped to 5.9 percent.
On the East coast, 0.4 percent of people arrested in Washington DC had meth in their system, and 0.1 percent in New York City.
80 percent of the meth used in the United States is produced and trafficked from Mexico. Between late 2007 and early 2012, the price of methamphetamine dropped by over 70 percent in the US, while the purity of the meth increased by nearly 130 percent.
Source (PDF): “National Drug Threat Assessment Summary 2013,” United States Department of Justice, Drug Enforcement Administration, November 2013, page 10.