Present paper deals with the physicochemical assessment of Lonar Lake Waetr. Lonar lake is situated about a kilometer to south west of Lonar town (North Latitude 19o 55' 45'', East Longitude 76o 34' 00'') in Buldhana district of Maharashtra. Physicochemical parameters were studied and analyzed for the period of two consecutive years i.e. from October 2017 to September 2019. In order to study the water quality of Lonar Lake, certain physicochemical parameters were selected. These parameters are colour, water temperature, pH, carbonate, bicarbonate, calcium, magnesium, potassium nitrate, phosphate, dissolved oxygen, free Co2, ammonia, turbidity, total solid, total dissolved solid, suspended solids, total hardness and total alkalinity were selected to asses water quality of Lonar lake. The Lonar Lake is always alkaline. The lake water is green in colour due to dominance of algal blooms in lake water.