EcoImpact – unraveling the ecological impact of micropollutants in streams

EcoImpact is an Eawag-wide interdisciplinary research effort. It aims at understanding how micropollutants (MP) discharged from wastewater treatment plants (WWTPs) affect stream ecosystems. The project is motivated by on-going upgrading of the Swiss WWTPs with advanced treatment steps for MP removal. 

EcoImpact 1

EcoImpact 1 was conducted from 2013 to 2016. It focused on in-stream observations upstream and downstream of at 24 WWTPs across the Swiss Plateau and the Jura. Additionally, flume experiments were developed to tease apart the influence of different wastewater constituents (MPs, nutrients). 

Further information on EcoImpact 1

EcoImpact 2.0

EcoImpact 2.0 starts in spring 2019. It builds on results of the previous stage and puts its main emphasis on flume experiments. It studied how the stream biofilms –communities consisting of algae, bacteria and fungi with important ecological functions – respond to MPs.

Further information on EcoImpact 2.0


Dr. Christian StammDeputy Head of DepartmentTel. +41 58 765 5565Send Mail

Latest publications

Arlos, M. J.; Schürz, F.; Fu, Q.; Lauper, B. B.; Stamm, C.; Hollender, J. (2020) Coupling river concentration simulations with a toxicokinetic model effectively predicts the internal concentrations of wastewater-derived micropollutants in field gammarids, Environmental Science and Technology, 54(3), 1710-1719, doi:10.1021/acs.est.9b05736, Institutional Repository
Burdon, F. J.; Munz, N. A.; Reyes, M.; Focks, A.; Joss, A.; Räsänen, K.; Altermatt, F.; Eggen, R. I. L.; Stamm, C. (2019) Agriculture versus wastewater pollution as drivers of macroinvertebrate community structure in streams, Science of the Total Environment, 659, 1256-1265, doi:10.1016/j.scitotenv.2018.12.372, Institutional Repository
Mansfeldt, C.; Deiner, K.; Mächler, E.; Fenner, K.; Eggen, R. I. L.; Stamm, C.; Schönenberger, U.; Walser, J.-C.; Altermatt, F. (2020) Microbial community shifts in streams receiving treated wastewater effluent, Science of the Total Environment, 709, 135727 (12 pp.), doi:10.1016/j.scitotenv.2019.135727, Institutional Repository
Kienle, C.; Vermeirssen, E. L. M.; Schifferli, A.; Singer, H.; Stamm, C.; Werner, I. (2019) Effects of treated wastewater on the ecotoxicity of small streams – unravelling the contribution of chemicals causing effects, PLoS One, 14(12), e0226278 (30 pp.), doi:10.1371/journal.pone.0226278, Institutional Repository