The anthropological impact caused by the inappropriate use of the land is the main threat to the Biological Reserve of Serra do Japi (Rebio), a significant part of the forest of the State of S�o Paulo, mainly characterized by hydrological wealth and flora and fauna biodiversity. One of the only remnants of the Atlantic Forest in the plateau of S�o Paulo, Rebio is located in the urban area of the municipality of Jundiai (SP). Despite being part of a Comprehensive Protection Unit, there are many trails used for visiting that surpass the limits of use intensity. There is also a trend towards bringing sylviculture to Rebio, which has caused problems related to the inappropriate use of land, including a greater incidence of forest fires. Considering that the region of the basins of the Piracicaba, Capivari and Jundiai rivers (PCJ) � where Rebio is located � has an availability of water under 1,000 m3 per inhabitant/year, the area is characterized by hydric stress, thus the conservation of areas with such biodiversity and spring wealth is fundamental to guarantee water, given the negative impact of climate change.