Following the participation to the LATINOSAN Conference in March 2019, the German project team travelled to the Instituto Costarricense de Acueductos y Alcantarillados (AyA) in San José, where Dr. Stefan and Dr. Caucci met the representatives of Research and Development Department and the International Cooperation Department. During the meeting, the cooperation project between UNA, TUD and extended consortium was introduced to AyA representatives. All sides reiterated their strong interest in further collaboration, with emphasis on the topics previously identified by TUD and AyA. It has been recommended to continue the discussions through the initiation of a joint Committee for Technical Investigation, together with representatives of SENARA and MINARA.