Other studies reported estimates of CH4 emissions that correlate with end-use in addition to disambiguating between major source types, or data that we used to estimate the contribution of potential end-use emissions to total city-level emissions. found a slightly lower contribution from metered consumption to total CH4 emissions in Washington, DC and Baltimore (21% to 22%). For Boston, reported mean annual natural gas CH4 emissions of 127 Gg/yr over an eightyear study period (2012 to 2020). We attribute 73.4% of these emissions to metered consumption using the y-intercept of natural gas CH4 emissions regressed on residential and commercial gas consumption reported in the study. This is equivalent to 47.1% of total CH4 emissions in Boston, although this number may be higher given the higher FFPs reported in other studies for Boston . For Indianapolis, we estimate that end-use emissions contribute at least 17.2% to total city-level emissions. This is based on fossil fuels accounting for an estimated 52% of total emissions in Indianapolis and end-use combustion estimated to contribute 33% to total fossil fuel emissions . If the FFP in Indianapolis is higher (~67%), as suggested in other studies , and end-use combustion is 33% of total fossil fuel emissions, then end-use emissions may contribute up to 22.1% of total CH4 emissions in this city, similar to Washington, DC and Baltimore.