The emission data which includes area and point sources, are directly from the 2016 CMAQ US CONUS domain (stored on atmos asm system, /asm/MOD3DATA/2016_12US1/emis/cb6r3_ae6_20190221). This dataset is not publicly accessible because: the data is too large for ScienceHub to host it. It can be accessed through the following means: contact the corresponding author. Format: netCDF format. This dataset is associated with the following publication: Walters, M., and C. Wong. The impact of altering emission data precision on compression efficiency and accuracy of simulations of the community multiscale air quality model. Geoscientific Model Development. Copernicus Publications, Katlenburg-Lindau, GERMANY, 16(4): 1179–1190, (2023).