Ford, BonneO'Dell, KatelynFischer, Emily V.Pierce, Jeffrey R.2022-08-122022-08-122022https://hdl.handle.net/10217/235551https://doi.org/10.25675/10217/235551http://dx.doi.org/10.25675/10217/235551This dataset contains spatially interpolated daily PM2.5 concentrations observed by monitors in the Environmental Protection Agency's Air Quality System and non-smoke seasonal background PM2.5 estimates as in https://doi.org/10.25675/10217/230602 (and http://doi.org/10.25675/10217/233962) but extended for 2021. See the readme file for details on data processing and recommended usage.Department of Atmospheric ScienceThis dataset contains spatially interpolated daily PM2.5 concentrations observed by monitors in the Environmental Protection Agency's Air Quality System and non-smoke seasonal background PM2.5 estimates for 2021. It is a continuation of the previous datasets: https://doi.org/10.25675/10217/230602 and http://doi.org/10.25675/10217/233962.ZIPTXTNetCDFPDFShapefileengDataset