Waste dumped by a sugarmill in Guantánamo, on the eastern extreme of Cuba, caused a fish-kill in the Guaso River, which forms part of one of the country's eight main river basins. Due to “operational negligence,” the factory dumped sugarcane must into the river, in which 17 contamination sites have been recorded. The mill received a fine equivalent to just 200 dollars.

Meanwhile, experts have yet to determine what caused a similar fish-kill in mid-February in the Havana river of Almendares.