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).

**Alpha Version Data** (has undergone several rounds of internal review from the Moore Institute and is ready for external review) This mock dataset is part of the [Microplastics Data Portal](https://github.com/Moore-Institute-4-Plastic-Pollution-Res/Microplastic_Data_Portal) and is intended to eventually serve as the data shared by state-accredited labs for microplastics in drinking water. It was created by discussions with domain experts. Data comes with a template with mock data entry and a rules file that can be used to validate the data using the [Data Validation Portal](https://wincowger.shinyapps.io/validate/).

**Alpha Version Data** (has undergone several rounds of internal review from the Moore Institute and is ready for external review) This mock dataset is part of the [Microplastics Data Portal](https://github.com/Moore-Institute-4-Plastic-Pollution-Res/Microplastic_Data_Portal) and is intended to eventually serve as the data shared by state-accredited labs for microplastics in drinking water. It was created by discussions with domain experts. Data comes with a template with mock data entry and a rules file that can be used to validate the data using the [Data Validation Portal](https://wincowger.shinyapps.io/validate/).

This project determined the ecological effect of coastal wastewater treatment plant (WWTP) outfalls in two different coastal settings. Treated effluent, seawater, and marine sediments were collected from two WWTP outfalls located in South Australia (Glenelg & St Kilda). This is a shallow and retentive receiving environment and may accumulate effluent contaminants. Additionally, sediments were collected from another WWTP outfall in New South Wales (Malabar). This deep-water outfall discharges into a highly dispersive environment and offers a point of comparison for contaminant retention with the outfalls located in South Australia. Work focused on five contaminants that water quality managers had identified in previous NESP MaC work (Project 1.16) as being highly important: nutrients and metals (traditional effluent pollutants); and antibiotics, per- and poly-fluoroalkyl substances (PFAS), and microplastics (contaminants of emerging concern). This record describes the results from the sediment sampling component of this study. Results from the effluent and seawater sampling are described separately by the record 'Effluent and seawater sampling data from wastewater treatment plant outfalls' (https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/00c3e9a2-5d2f-44de-9c30-00f4af385b6a). Data is currently under embargo, to be released in January 2026.

The meta data for the tables and figures are described in the Legends, Methods and Supplementary data files. This dataset is associated with the following publication: Surette, M., D.M. Mitrano, and K. Rogers. Extraction and Concentration of Nanoplastic Particles from Aqueous Suspensions using Functionalized Magnetic Nanoparticles and a Magnetic Flow Cell. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA,