Report Detects Cocaine and Production Chemicals in Colombian Tap Water

A report released May 24, 2026 by the Center for a Secure Free Society states that cocaine and chemicals linked to its production were found in treated drinking water in multiple Colombian cities. The study collected samples from twelve cities, including Bogotá, Medellín, Cali, Cartagena, Cúcuta and seven additional municipalities.

Laboratory tests detected cocaine in tap water in Bogotá, Cartagena, Popayán and Quibdó, and in untreated water entering the system in Cali.

8 million residents. Additional substances identified at multiple sites include ammonia, diesel, acetone, methanol and gasoline. The report links the findings to Colombia’s cocaine economy and its effects on water systems, ecosystems, public health, agriculture and national security.

The Center for a Secure Free Society is publishing the full report titled “Invisible Contamination: Cocaine and Chemical Inputs Associated with Illicit Production in Colombia’s Drinking Water.