A data-driven analysis of trace contaminants in wet-weather discharges

Lena Mutzner*, Viviane Furrer, Hélène Castebrunet, Wolfgang Gernjak, Marie-Christine Gromaire, Andreas Matzinger, Peter Steen Mikkelsen, William R. Selbig, Luca Vezzaro

*Corresponding author for this work

    Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

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    Urban wet-weather discharges (combined sewer overflows, CSO and stormwater outlets from separate sewers, SWO) contain various trace contaminants which can pose a threat to receiving waters (Launay et al., 2016; Mutzner et al., 2020; Wicke et al., 2021). Hence, there is a need to identify critical contaminants and to quantify pollutant concentrations in wet-weather discharges to assess effective control strategies. Efforts have been made in the last decade to increase our understanding of the presence, magnitude, and diversity of contaminants in wet-weather discharges (e.g. Gasperi et al., 2014; Launay et al., 2016; Masoner et al., 2019; Mutzner et al., 2020; Rippy et al., 2017). Despite these efforts, the information gained with these monitoring campaigns is still limited, as most contain small, local datasets both in terms of sampled discharge events and spatial coverage. In this study, we use a data-driven statistical analysis of existing measurements collected at more than 60 wet-weather discharge sites to gain insight on the frequency of detection and relative abundance of trace contaminants. This information can be used to inform future monitoring efforts as utilities and regulators work towards building effective management strategies.
    Original languageEnglish
    Publication date2021
    Number of pages3
    Publication statusPublished - 2021
    Event15th International Conference on Urban Drainage - Virtual meeting
    Duration: 25 Oct 202128 Oct 2021


    Conference15th International Conference on Urban Drainage
    LocationVirtual meeting


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