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Online platform for estimating arsenic and fluoride contamination

April 28, 2016 - Over 300 million people use groundwater contaminated with arsenic or fluoride. The free available Groundwater Assessment Platform GAP is now online.

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Sample of Corbicula fluminea from the Lake Constance. Photo: Madleina Gerecke, Eawag / ETHZ
April 28, 2016

The filter-feeding Asian clam (Corbicula fluminea), an invasive species which entered Europe in the 1980s and was not recorded in Lake Constance until after 2000, has now colonized the eastern part of this lake. The extent of the invasion is shown by an ETH Zurich Environmental Sciences student’s Bachelor thesis, supervised at Eawag: densities of up to 900 clams per square metre were found in the lake. Read more

Fig. 1: Juvenile whitefish prior to their release from a hatchery into Lake Thun. (Photo: Emanuel Ammon, Ex-Press)
April 21, 2016

In the last century, the natural reproduction of whitefish and Arctic char in several Swiss lakes was adversely affected by high levels of nutrient inputs. So far, stocking measures have been implemented in efforts to support fish populations and maintain yields. The effectiveness of these measures varies according to the particular species and lake. Read more

© Eawag (Photo: Jürg Siegrist)
April 13, 2016

The pipe material used for shower hoses or tap connections influences the type and amount of bacterial growth. This was shown by an Eawag study in which the microbiological impact of six commonly used plastic pipe materials was compared in a shower simulator over an eight-month period. Read more