From July 2019 until January 2021, six models of air sensors were operated at seven air quality monitoring sites across the U.S. in Phoenix, Arizona, Denver, Colorado, Wilmington, Delaware, Decatur, Georgia, Research Triangle Park, North Carolina, Oklahoma City, Oklahoma, and Milwaukee, Wisconsin. Sensors testing included the Aeroqual AQY, Clarity Node, Clarity Node-S, Applied Particle Technology Maxima, PurpleAir PA-II-SD, Sensit RAPM, and Aerodyne Arisense. This dataset includes the processed data from the paper "Long term performance of six PM2.5 sensors across the United States" loaded here in sciencehub and also the raw datasets from the sensors loaded into Zenodo.