Lonar is one of the youngest Lake and is unique in the world for its alkalinity and salinity of the water. But its alkalinity, pH and salinity go on decrease day by day. An attempt has been made to examine environmental analysis of Lonar Lake. Objective: This papers aims at improving the water quality in the lakes from hyper-eutrophic to minor eutrophic conditions. Methods: The physical and chemical parameters were analyzed as per APHA. Results: It is found that major Spirulina species of algae was found in lake water. This species Spirulina having medicinal value for human body. This species occupied the Lonar lake water phytoplankton about 90.0% and above. Rests of 10 % are other members of Chlorophyceae, Cynophyceae and Bacillariophyceae also found in this lake. Lonar lake water was found to be very rich in mineral nutrient contents. No fish species was recorded in the same water body. Conclusions: Hence this World heritage lake should be preserved for its alkalinity and salinity. Use of agrochemicals on crater floor; nuisance of tourists; sewage disposal in the lake; constructions on the crater rim; etc. are some of the problems requiring attention. The lake urgently needs to take immediate protection from pollution and save and preserve for future generations.

Physical, chemical, ionic, biological studies were conducted at hot springs Unkeshwar in (Maharashtra State, India). It is positioned on south east corner of Maharashtra. Unkeshwar is situated on the bank of river Penganga. Objective: This papers aims to study the physical, chemical and biological properties in the ecological system of Unkeshwar spring. Methods: The physical and chemical parameters were analyzed as per APHA. Results: The physical parameters included: Temperature, Total solids, Total dissolved solids, Total suspended solids and electrical conductivity. The chemical parameters included: pH, free carbon-dioxide, total hardness, calcium hardness, magnesium hardness, Phenolphthalein alkalinity, total alkalinity, Salinity. Ionic parameters like chloride, phosphate, sulphate, calcium, magnesium, sodium, potassium, iron, chromium and manganese. Also the biological parameters studied standard plate count and most probable number. Conclusions: The water quality comparison of Unkeshwar spring in Nanded reveals that although the situation is not worst but it has to be maintained. Some of the water characteristics are below the permissible limit in the post-monsoon season and some are above the permissible limits in pre-monsoon season. This may be due to dilution of water by raining. Overall study showed that the water is more polluted in pre-monsoon as compared to post-monsoon. Hence this hot water spring should be preserved for its sulphur contents that possess medicinal value and cure skin diseases.