Small form factor filter based PM collection data from both co-located ambient sampling and chamber studies conducted on controlled smoke environments. Metadata is contained within files. This dataset is associated with the following publication: Krug, J.D., R. Long, M. Colon, A. Habel, S. Urbanski, and M. Landis. Evaluation of Small Form Factor, Filter-Based PM2.5 Samplers for Temporary Non-Regulatory Monitoring During Wildland Fire Smoke Events. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, USA, 265: 0, (2021).