Serrania El Majuy, located in the municipality of Cota, Cundinamarca, is a mountainous formation with high ecological significance, which, due to continuous industrial growth in the savannah of Bogotá, mainly in the central savannah (Siberia sector) can undergo environmental, scenic or cultural alterations. This article explores the potential impact of industrial expansion in the Siberia sector on rainfall in the vicinity of the indigenous reserve of Cota, carried out using physic-chemical tests (pH, nitrites, sulfates and conductivity) and through bio-indicators as lichens present in the area (Cetrelia sp., Flavopunctelia sp., Usnea sp., hypotrachyna sp., Xanthoparmelia sp.,Acarospora socialis sp., Caloplaca chantolyta sp., Caloplaca socialis sp., Candelariella Xanthostigma sp.), with which the Lichen Diversity Value (LDV) index, the Shannon index and the Atmospheric Purity Index (API) were calculated. A dispersion map was also made for the incidence of atmospheric emissions, with which it was determined that a significant pollutant concentration could be present in El Majuy mountain range but more data is required to confirm this affectation. The main conclusion of this research is that, in general, there is no acid behavior in rainfall in El Majuy mountain range in the period of time evaluated.