Tsunza often suffers of water shortages and the main pipe usually breaks down, leaving the villagers without water supply for long weeks. Therefore, COA felt the need of building a big water tank next to the medical dispensary, to provide a continuous source of water that would never put the health of patients in danger.
In 2010, a group of students from the Spanish Highschool, IES Llica, already fundraised some money for this purpose. However, the money was used to cover the completion of the public library, as the funds were not enough for the water tank. This year, two Spanish volunteers, Maria Cerezo and Laura Martinez, fundraised enough to cover it all, and to see it completely built.