Is enough being done to make drinking water safe?

There is a lack of evidence regarding the effectiveness of technologies used to reduce arsenic contamination finds research in BioMed Central's open access journal Environmental Evidence. More studies assessing the technologies themselves and how they are used in the community are needed to ensure that people have access to safe, clean water.

Arsenic is now recognised to be one of the world's greatest , threatening the lives of several hundred million people. Naturally occurring arsenic leaches into from surrounding rocks and once in the water supply it is both toxic and carcinogenic to anyone drinking it. It is colourless and odourless and consequently people use it instead of more obviously polluted surface water. Natural arsenic pollution affects 21 countries across the world sometimes reaching a concentration more than ten times the WHO guidelines.

There are several methods available for removing arsenic from . Researchers from the University of Exeter Medical School (supported by the National Institute for Health for Leadership in Applied Health Research and Care in the South West Peninsula (NIHR PenCLAHRC), compared 8 different technologies all of which claim to make drinking water safe. They found that most of the studies reviewed were found to be of poor quality and missing data and that only two technologies showed good evidence of effectiveness.

Lack of data was not the only problem with these technologies. Dr Mark Pearson, who led this study, explained, "Combining the qualitative results it became clear that a major problem was the reluctance of the user. Many people in affected regions, even if aware of the problems with arsenic, believe that they will not be affected, or find the technologies too difficult to use and maintain."

Dr Pearson continued, "It is imperative that more data is made available for decision makers to choose the most appropriate and effective technology for ensuring clean safe water. For any technology to be successful it also needs to take into account how acceptable the technology is to users, how people perceive the problem, the role of women in society and how to instil a sense of ownership into the community."

More information: Are interventions to reduce the impact of arsenic contamination of groundwater on human health in developing countries effective? A systematic review, Tracey Jones-Hughes, Jaime Peters, Rebecca Whear, Chris Cooper, Hywel Evans, Michael Depledge and Mark Pearson Environmental Evidence 2013 2:11, doi:10.1186/2047-2382-2-11

add to favorites email to friend print save as pdf

Related Stories

Arsenic in drinking water linked to lung disease

Dec 06, 2012

New research from the Telethon Institute for Child Health Research has uncovered likely mechanisms for the link between arsenic in drinking water and increased risk of developing chronic lung disease.

Widely used filtering material adds arsenic to beers

Apr 07, 2013

The mystery of how arsenic levels in beer sold in Germany could be higher than in the water or other ingredients used to brew the beer has been solved, scientists announced here today at the 245th National ...

Arsenic for better drugs and cleaner crops

Jun 25, 2012

Research carried out at the University of Gothenburg may lead to more effective arsenic-containing drugs. The results may also lead to more resistant plants, and crops with a limited absorption and storage of arsenic.

Recommended for you

User comments