Groundwater occurs almost everywhere beneath the land surface. Arsenic contamination in groundwater is a form of groundwater pollution. Arsenic is a chemical element with the symbol ‘As’ and atomic number 33. Arsenic in water is a vital problem in many countries around the world including Bangladesh, India and China etc. In India, groundwater arsenic contamination and health effect were first reported in 1997 in Chandigarh. Arsenic can be found in the groundwater of Brahmaputra valley in Assam. The aim of this research paper is to investigate the elevation and groundwater arsenic contamination in Darang district of Assam. Primary data have been collected and tested in University laboratory to know the value of arsenic in groundwater. Many water samples were contaminated with arsenic. Arsenic affects a broad range of organs and system including skin, nervous system, respiration system, liver, kidney, immune system etc. Arsenic poisoning occurs due to the high level of arsenic in the body. Interpolation method has been use to show the vertical distribution pattern of groundwater arsenic contamination with the help of Arc GIS 10.2.1. Digital Elevation Model has been prepared with the help of satellite data to show the relation between elevation and arsenic in groundwater.
Key words: Arsenic, Groundwater, Elevation and Distribution