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                                                                                          Updated April 16, 2020
Trends in Mexican Opioid Trafficking and Implications for

U.S.-Mexico Security Cooperation


As a primary source of and transit country for illicit drugs
destined for the United States, Mexico plays a key role in
U.S. drug control policy. Included among the illicit drugs
produced in Mexico are heroin, fentanyl, fentanyl
analogues, and other opioids-substances that have
contributed to the ongoing opioid epidemic in the United
States. As policymakers search for solutions to the current
opioid crisis, some may look abroad to the countries where
illicit U.S.-bound opioids are produced and trafficked,
including Mexico.

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Heroin is a highly addictive and internationally controlled
narcotic processed from morphine and extracted from
certain types of opium poppy plants. According to the
United Nations Office on Drugs and Crime (UNODC),
global opium poppy cultivation levels were higher in 2017
and 2018 than in any year since 2000. Less than 10% of
global opium poppy cultivation took place in Mexico.

Although heroin from Southwest and Southeast Asia
accounts for the vast majority of global production, Latin
America has featured as the main source of U.S.-consumed
heroin in recent decades. Until recently, Colombia and, to a
much lesser extent, Guatemala supplied the bulk of the U.S.
market. Since 2013, the majority of U.S.-seized heroin has
originated in Mexico as Mexican transnational criminal
organizations have taken over the U.S. market.

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According to the U.S. Office of National Drug Control
Policy (ONDCP), 41,800 hectares of opium poppy were
cultivated in Mexico in 2018-down 5% compared to 2017,
but up 280% since 2013 (see Figure 1). Lower prices for
farm gate opium in 2018 (due in part to a possible
oversupply amid stable U.S. demand) appear to account for
the decline in cultivation that year. Opium poppy
cultivation historically has been concentrated in the hilly,
western regions of the country in two primary zones: the
southwestern states of Guerrero (and to a much lesser
extent Oaxaca) and the tri-border or golden triangle
region of Durango, Sinaloa, and Chihuahua.

Along with opium poppy cultivation, heroin production has
also surged in Mexico since 2013. According to ONDCP,
Mexico produced an estimated 106 metric tons of potential
pure heroin in 2018, down 4.5% compared to 2017, but up
308% since 2013. In 2018, Mexican-sourced heroin
accounted for 93% of the total weight of U.S.-seized heroin
analyzed in the Drug Enforcement Administration's
(DEA's) Heroin Signature Program. According to data
collected by U.S. Customs and Border Protection, heroin


seizures along the Southwest border have also increased,
doubling between 2010 and 2015, briefly declining in 2016,
and then increasing again in 2017 and 2018 to the highest
recorded total since 2012.

Figure I. Poppy Cultivation in Mexico
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Source: Graphic created by CRS using data from ONDCP (2019),
State Department (2017), Esri (2014), and DeLorme (2014).


The Mexican military is involved in several aspects of
domestic drug control. Since the 1930s, the army has
conducted drug eradication activities. The military is also
involved in detecting and interdicting illicit precursor
chemicals, currency, and drugs; dismantling clandestine
drug labs; and arresting drug kingpins. In 2017, the navy
assumed control over Mexico's ports (where most imports
of precursor chemicals needed for the manufacture of illicit
drugs arrive) from the country's customs agency.

During 2019, the first year of Andr6s Manuel L6pez
Obrador's presidential term, eradication and interdiction
efforts lagged. Mexico's armed forces eradicated an
estimated 11,791 hectares, down from 21,556 hectares in


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