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Podcast  I  The global threat of arsenic in drinking water

... Joel Podgorski, a senior scientist in the Water Resources and Drinking Water Department at the Swiss Federal Institute of Aquatic Science and Technology, joins host Sarah Crespi to discuss the global threat of arsenic in drinking water. Arsenic is basically present in all rocks in minute amounts. Under the right conditions it can leach into groundwater and poison drinking water. Without a noticeable taste or smell, arsenic contamination can go undetected for years. The paper, published in Science, estimates that more than 100 million people are at risk of drinking arsenic-contaminated water and provides a guide for the most important places to test.

May 26, 2020

Global arsenic prediction and estimated population at risk

Many experts describe the health effects of drinking water contaminated with toxic concentrations of arsenic as the greatest mass poisoning in human history. A risk model developed by Eawag researcher Joel Podgorski now shows that up to 220 million people worldwide could be affected.

Today, one third of the world’s population obtains its drinking water and water for irrigation....

May 22, 2020

Eawag researchers selected for the “Sandmeyer Award”

Michael Berg, Stephan Hug, Annette Johnson (in memoriam), Andreas Voegelin and Lenny Winkel from the Department of Water Resources and Drinking Water (W +T) at Eawag have been selected for the “Sandmeyer Award” from the Swiss Chemical Society (SCG) for their many years of work researching contamination of drinking water resources with geogenic elements.

The contamination of drinking water with geogenic elements such as arsenic and fluoride is a problem that affects several hundred million people around the world....

December 13, 2018

India’s excess fluoride in groundwater

Fluoride occurs naturally in groundwater. In small amounts, this is usually not a problem, but in India the concentration in many places exceeds the threshold at which is starts to present a health hazard. According to estimates by Eawag researchers, based on new computer models, more than a hundred million people are affected....

August 16, 2018

Arsenic risk in Pakistan much greater than expected

Arsenic-contaminated groundwater used as drinking water or for irrigation may threaten the health of 50 to 60 million people in Pakistan. This is shown by an Eawag-led study – co-financed by SDC – in which data from 1200 groundwater samples was analysed and combined with geological and hydrological parameters to generate a hazard map. This reveals for the first time the full extent of the risks to which the population of Pakistan is exposed. In addition, there is growing evidence that natural arsenic levels are increased by extensive irrigation...

August 23, 2017

Burkina Faso Project 

Arsenic contamination in groundwater from crystalline basement rocks in West Africa has only been documented in isolated areas and presents a serious health threat in a region already facing multiple challenges related to water quality and scarcity. We present a comprehensive dataset of arsenic concentrations from drinking water wells in rural Burkina Faso (n = 1498), of which 14.6% are above 10 μg/L. Included in this dataset are 269 new samples from regions where no published water quality data existed....

April 15, 2017

New Risk Model Sheds Light on Arsenic Risk in China's Groundwater

Arsenic-laden groundwater used for cooking and drinking could pose a risk to the health of almost 20 million people across China. This is shown by a study carried out by Eawag scientists in collaboration with Chinese colleagues and published today in Science. The estimates are based on a risk model incorporating geological and hydrological data, as well as measurements of arsenic in wells. The study is being adopted by the authorities in the national groundwater monitoring programme....

August 22, 2013

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