Odours associated with hydrogen sulphide (H₂S) have been a concern in the municipality of Sibaté (Colombia) over the last decades. With the aim of determining the odour impact of Muña's reservoir, different H₂S emission sources were evaluated and simulated. H₂S surface emission rates from Muña's reservoir were estimated using the Flux Chamber experimental method. Meteorological conditions and emission rates were then fed to the AERMOD® model to identify the contribution of Muña's reservoir on H₂S concentration in Sibaté’s urban area. These results were compared and calibrated with real time H₂S atmospheric concentration data. The average H₂S emission rate was 1,886 μg/(min·m²), which primarily affects the municipality when wind direction is towards the south. The results of this study demonstrated the applicability of the AERMOD® model and flux chamber measurements in predicting H₂S behaviour in the Sibaté region.