Water is not potable if its salinity exceeds 1 part per thousand (ppt), and water cannot be used for dry season paddy irrigation if its salinity exceeds 2 ppt. Recent field measurements conducted in Basanti, Gosaba, Hingalganj, Kultali, Namkhana, Pathar Pratima and Sagar Block, found that tube-well water salinity exceeds 1 ppt in 17 of 50 hamlets in Gosaba, Hingalgunj and Patharpratima blocks of the Sundarban Reclaimed (populated) Area in India. Measured salinity of water samples collected from Bidya, Matla, Hooghly, and Raimangal Rivers was in the range of 13-27ppt. This dataset was prepared by Sreejit Roy, Saptarshi Chakraborty, Tapas Kumar Sutradhar and Santadas Ghosh