Institutional citation for the dataset: PROCTOR, K., PETRIE, B., LOPARDO, L., MUĂ‘OZ, D.C., RICE, J., BARDEN, R., ARNOT, T. and KASPRZYK-HORDERN, B. 2021. Micropollutant fluxes in urban environment: a catchment perspective. [Dataset]. Journal of hazardous materials [online], article ID 123745. Available from: https://www.sciencedirect.com/science/article/pii/S0304389420317349?via%3Dihub#sec0115 Dataset URL: https://www.sciencedirect.com/science/article/pii/S0304389420317349?via%3Dihub#sec0115 https://web.archive.org/web/20210119153632/https://www.sciencedirect.com/science/article/abs/pii/S0304389420317349?via%3Dihub (archived 2021.01.19) Dataset Abstract: Anthropogenic substances, such as pharmaceuticals, pesticides, plasticizers, UV filters, industrial chemicals etc., have been widely recognised to be entering the environment from a variety of sources. There are many studies that detail the presence of a range of compounds in a variety of matrices, however the majority of this existing work has been focused on one or two classes at a time, or a small number of compounds of emerging concern (CECs), primarily in aqueous matrices. The aim of the paper is to investigate the changes in micropollutant load throughout a river catchment system in the South-West of the UK, to gain further information on their sources, fate and behaviour. This was achieved by undertaking a comprehensive investigation of 142 CECs, previously prioritised and analytical method validated (Proctor et al., 2019), at five strategic WwTWs representing >75 % of the catchment population. At each WwTW, influent (both liquid and solid phases) and effluent wastewater, digested solids, and upstream and downstream river water were monitored for 7 consecutive days.