Argentina has extended its self-declared zone as free of notifiable diseases affecting salmonids, as recognized by the World Organization for Animal Health (OMSA), to include the Piedra del Águila reservoir. This expansion builds on the existing free zone that covered the upper basin of the Limay River and the Alicurá reservoir, thanks to comprehensive surveillance and monitoring efforts since 2006. The documentation submitted by the National Agrifood Health and Quality Service (Senasa) demonstrates the absence of several diseases affecting salmonids, supporting the extension of the free zone in provinces Neuquén and Río Negro. This effort is part of Argentina's ongoing commitment to epidemiological surveillance, aiming to ensure a healthier environment for salmonids and facilitate international trade by providing transparent information about the country's sanitary status.