The data sets include the Village Green Project station time series, including air pollutant concentrations, meteorology data, and diagnostic data from instrumentation. Additionally, air pollutant concentration data from the Hong Kong Environmental Protection Department's Eastern station are included. This dataset is associated with the following publication: Wei, P., Z. Ning, D. Westerdahl, Y.F. Lam, P. Louie, R. Sharpe, R. Williams, and G. Hagler. Solar-powered air quality monitor applied under subtropical conditions in Hong Kong: Performance evaluation and application for pollution source tracking. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, USA, 214: 116825, (2019).