Deep groundwater in coastal deltas protected from contamination
A new study by the British Geological Survey (BGS) and University College London (UCL), led by Dr Dan Lapworth, has been published today in Geophysical Research Letters. This study shows that groundwater pumped from depths below 150 m in the coastal regions of the Bengal basin is thousands of years old and generally secure from contamination by salinity and arsenic found in shallow groundwater.