Salvador is seeking to implement new low carbon technologies and establish a process for managing the risks and opportunities represented by climate change since it published its first inventory about of the Greenhouse Gas Emissions in 2016 The continuity of these actions is seen with the publication of its second inventory in 2020 The existing bibliography on urban inventories of Greenhouse Gas Emissions GHG proves the importance and potential of cities to contribute to tackling climate change The inventory is the instrument for monitoring and controlling these emissions so its quality is fundamental to support the proposal of mitigating actions One of the challenges pointed out by the scientific community is the comparability of urban GHG inventories This work has as main objective to carry out a comparative analysis of the results of the Waste Sector presented in the first and second Inventory of Emissions of Greenhouse Gas Emissions in Salvador and to identify important gaps that still exist Thus it is intended to contribute to promoting improvements in its next revisions and updates Considering the measurement methodology adopted and after analyzing the results presented opportunities for improvement were identified for the Waste Sector considered insufficient in the two inventories in Salvado