The present manual provides valuable information regarding physico-chemical characterization of the Rewalsar Lake, situated in Mandi District of Himachal Pradesh (India). This manuscript has been illustrated with 6 tables, 11 figures and 18 coloured photographs, clearly representing the usefulness of the treatise. It will prove to be helpful for the students, researchers, teachers and scientists in the field of Chemical Sciences, Biological Sciences, Environmental Sciences, etc. Moreover, the present manual will attract the attention of Research Institutions, Policy planners and Layman alike.