Arsenic risk high in Sumatra, Myanmar, Cambodia: study

PARIS (AFP) — Eastern Sumatra, the Irrawaddy delta in Myanmar and Cambodia's Tonle Sap lake are among areas in Southeast Asia facing a high risk of arsenic contamination in the water, according to a study published on Friday.

The researchers use innovative digitalised techniques, drawing on geology, geography and soil chemistry, to compile a "probability map" of naturally-occurring arsenic concentrations in five Southeast Asian countries and Bangladesh.

The map is intended as a useful pointer for health watchdogs, urban planners and water engineers worried about concentrations of this poison in groundwater supplies but lacking the funds to carry out wide-scale analysis of water samples.

Published online in the journal Nature Neuroscience, the Swiss-led study combined several methods to compile its probability model.

These included knowledge about sediments whose textures and chemical or bacterial properties could release arsenic from the local ore, thus contaminating aquifers.

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