The data set contains a summary of literature sources involving microplastics in urban watersheds. This This primarily deals with aqueous phase and sediments from freshwater systems, along with influent and effluent from wastewater treatment plants. This dataset is not publicly accessible because: There are no data associated with this review paper. It can be accessed through the following means: N/A. Format: This is a review article. There are no data associated with the entry. This dataset is associated with the following publication: Birch, Q.T., P.M. Potter, P.X. Pinto, D.D. Dionysiou, and S.R. Al-Abed. Sources, transport, measurement, and impact of nano and microplastics in urban watersheds. ENVIRONMENTAL POLLUTION. Elsevier Science Ltd, New York, NY, USA, 19: 275-336, (2020).