Citizen Science in the world in general(1) and in Brazil in particular, has been consolidating itself as an important process integrating the scientific field with the socio-environmental one, equally benefiting researchers and citizens. The Brazilian Citizen Science Network (2) (RBCC, in Portuguese) has held two workshops in recent years aimed at exchanging knowledge and stimulating research on this topic. Within Citizen Science, participatory monitoring of the quality of aquatic ecosystems has attracted researchers and actors from society, generating several advantages for both. Among the known methodologies, a field kit for physical-chemical analysis (ECOKIT®) and an environmental perception protocol were used in this work. Two teams were formed, working in different river basins, constituting important sources of water supply in the Federal District, Capital of Brazil. The team formed by researchers from the University of Brasília worked at a point in the Capoeira do Bálsamo stream in the Paranoá Hydrographic Basin (15o 44' 58.79”S and 47o 48' 27.62”W) and the team formed by researchers from the Educator Park, partnership of the Secretary of State for Education and the Brasília Ambiental Institute, worked on the Taguatinga stream (15° 51' 24.81" S 48° 2' 59.29"W) in the Descoberto Hydrographic Basin. In both teams, citizens were elementary school students and their teachers. Four field collections were carried out, always in the same stretches in each stream, throughout the second half of 2022. Despite the methodological similarities, some differences between the two surveys allow discussing, in the light of the results obtained and from an eco-pedagogical point of view, paths that enable the deepening and expansion of the training of Citizen Scientists in our territory.