Environmental education is a decisive tool in the promotion of a citizenry committed to environmental sustainability. Among the current challenges, the management of water shortage is one of the main issues, thus addressing it from childhood is crucial to enhance the connection with nature. Few studies report on the impact of educational programmes about water on minors; therefore, this exploratory study values whether participating in environmental education programmes improves the environmental knowledge, attitudes and perception about water. The study sample was constituted by 607 students (8-16 years of age), from primary and secondary education. The results show evidence about the effectiveness of environmental education programmes about water. Particularly, the changes were greater when the environmental knowledge and perception were evaluated. There was an increase in the willing to learn and know more about environmental education and water. Educational strategies are provided for the future development of environmental education programmes.