We are planning to publish our model product on source-receptor relationship (SRR) simulations using FLEXPART-ERA5 in backward mode. This dataset spans 28 years (1994–2021) of ozone observations, covering altitudes from 900 hPa to 300 hPa over western North America. The resulting SRR allows users to investigate the similarities and differences in the origin locations of air parcels that contained, for instance, the highest and lowest ozone levels when sampled near or over western North America. We have uploaded an example of our product on this site, and the complete dataset will ultimately be archived at NASA's Atmospheric Science Data Center (ASDC). Specifically, this sample include: 1) a folder for one-month SRR with a corresponding readme file ("WUSA_201607_v2.zip"). 2) a monthly averaged NetCDF file with an accompanying readme file ("Example_montly_2001-02_NH.nc"). 3) three MATLAB scripts for binary-to-NetCDF conversion (connecting 1) and 2)). 4) the 28-year ozone data CSV file ("Receptor_western_NAmerica_ozone_obs_1994_2021_from900to300.csv"). Additionally, we have prepared a to-be-submitted manuscript to describe this product in detail, including its associated applications.