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Fish sampling at river Wigger (photo: EPFL)
October 27, 2017

In Switzerland – not to mention the rest of Europe and the United States – freshwater fish are falling victim to a deadly disease that is rampant in the summer and dormant in the winter. It is caused by a parasite that thrives in rivers and attacks salmonid fish in particular. Researchers from EPFL, Eawag and University of Bern have come up with a mathematical model for predicting outbreaks as part of a three-year joint research program. Read more

Sampling sediment cores on Greifensee near Zurich (photo: Aurea Chiaia, Eawag).
October 26, 2017

Humans have so profoundly altered the Earth that, some scientists argue, our current geologic epoch requires a new name: the Anthropocene. But defining the precise start of the era is tricky. Would it begin with the spread of domesticated farm animals or the appearance of radioactive elements from nuclear bomb tests?  Read more

If large amounts of organic carbon compounds are leached from plastic pipes into water, strong bacterial growth occurs even with regular flushing. (Photo: Vario Images)
October 23, 2017

Although bacteria are an inevitable – and important – component of drinking water, the colonization of pipes by pathogenic organisms can lead to microbiological quality problems. However, according to an Eawag/HSLU project co-funded by the Commission for Technology and Innovation (CTI), various measures can be taken to minimise this risk.  Read more

Resistant bacteria can grow in an antibiotic-treated culture medium. (Photo: Helmut Bürgmann, Eawag)
October 18, 2017

Compared to other foodstuffs, Switzerland’s drinking water shows low levels of contamination with antibiotic-resistant bacteria or resistance genes. This was demonstrated in a study of eight drinking water systems carried out by Eawag researchers on behalf of the Swiss Gas and Water Industry Association (SVGW) and water suppliers. Read more

Pond snails are affected by temperature stress and exposure to micropollutants. (Photo: Marko Koenig, Imagebroker, Okapia)
October 16, 2017

In a laboratory experiment, Eawag ecologists studied how the pond snail Lymnaea stagnalis is affected by heatwaves, which are expected to become more frequent as a result of climate change. Snails exposed to temperature stress showed a greater investment in reproduction, egg production increasing by 60 per cent on average.  Read more

Many years after pesticides are applied, residues can still be detected in soils. (Photo: Markus Bolliger, FOEN)
October 12, 2017

According to a study funded by the Federal Office for the Environment, pesticides or transformation products can persist in soils for a decade or more. In the study, Eawag and Agroscope scientists analysed topsoil samples collected from 14 agricultural sites between 1995 and 2008 as part of the Swiss Soil Monitoring Network programme.  Read more

Sampling at the Werdhölzli treatment plant in Zurich. (Photo: Eawag, Elke Suess)
October 10, 2017

A study just published by Eawag scientists shows that gold and silver each amounting to around CHF 1.5 million a year are lost via effluents and sludge from wastewater treatment plants in Switzerland. The concentrations measured do not pose risks to the environment – and recycling would not be economically worthwhile. However, the study also produced surprising findings on other trace elements in wastewater, including rare earth metals such as gadolinium and the heavy metal niobium. Read more

The network of Swiss water forums, which frequently take the form of working groups or subcommittees within larger associations. (Graphic: Fischer et al.)
October 9, 2017

A study by Eawag environmental social scientists has identified a total of 23 forums in Switzerland concerned with water-related issues, such as the Swiss Water Management Association (SWV), Water Agenda 21, the Swiss Water Association (VSA) and the Swiss Gas and Water Industry Association (SVGW).  Read more

Collection of water samples from Lake Cadagno (canton of Ticino, 1920 m asl). (Photo: Eawag, Helmut Bürgmann)
October 5, 2017

Single-celled bacteria are capable of mixing water layers in lakes – not directly, by movement of their flagella, but by accumulating locally and thus increasing water density. The heavier water then sinks, creating circular currents. Researchers have now observed this process for the first time not just in the laboratory, but in a natural water body – Lake Cadagno (canton of Ticino). Read more

Jörg Rieckermann awarded with “Mid-term Career Achievement Award” (Photo: ICUD 2017)
October 4, 2017

Jörg Rieckermann, group leader within Eawag’s Urban Water Management department, was awarded with the “Mid-term Career Achievement Award” during this year’s International Conference on Urban Drainage (ICUD) in Prague. Every three years, the Joint Committee on Urban Drainage (JCUD) recognizes outstanding achievements of professionals in the field of urban drainage by bestowing this career achievement award. Read more