Barbosa M, Abella J, Rojas J, Montaña M, Medina K, Osorio S, Gonzalez K Introduction: Odours are associated with chemicals potentially harmful to human health. 6359 tons per day of solid waste are deposited in Doña Juana landfill (Bogota, Colombia) located in the territories of Ciudad Bolivar and Usme. On 2 October 2015, a landslide occurred into the landfill producing an odour that spread to nearby areas. The aim of this study was to evaluate the perception of odours in the population of Ciudad Bolivar and Usme territories. Methodology: the study compared an area less exposed to offensive odours (Usaquén) and a more exposed area (Ciudad Bolivar and Usme), according to the direction of the winds and geography. A probability sample (CI 95%, error 3%, 50% of prevalence) was estimated in 1646 people in Ciudad Bolivar, 1433 in Usme, and 1159 in Usaquen; the frequency, intensity, and duration of the odour according to FIDO methodology (frequency, intensity, duration and offensiveness), as well as signs and symptoms related by a symptom diary applied by health workers were evaluated. A bivariate analysis was performed, obtaining OR and confidence intervals of 95%. Results: The frequency, intensity and duration of odours were higher in the areas of greatest exposure. The OR (95% CI) for Ciudad Bolivar compared to Usaquén were: 1.0123 (0.9638 to 1.3090), 1.9359 (1,6502- 2.2712), 1.5114 (1,1768-1.9413) 1.4907 (1.2651 to 1.7565), 2.2196 (1,872- 2.6313) for mood, respiratory, skin, gastrointestinal, and other symptoms respectively; for Usme regarding Usaquén: 0.6047 (0.5066- 0.7217), 2.2258 (1.8548 – 1.8550), 1.9978 (1.5380 – 2.852), 0.8368 (0, 6909 – 1.0135) for the same symptoms, respectively. Conclusion: there was a greater perception of odours in the exposed areas, and a statistically significant probability for the presence of respiratory, skin and gastrointestinal symptoms in areas exposed to offensive odours with respect to the less exposed. The landslide of the landfill had a significant effect on the health of the surrounding population.