After stone-age man started to live on the banks of river and lakes, human societies developed and grew on the banks of river and lake. The purpose of this was that man use water for various purposes like drinking and irrigation. After the growth of industrialization and urbanization, there has been an increased pollution load on the rivers in India. The most important sources of pollution in rivers and lakes are the untreated sewage and direct discharge of waste water in sewage. Due to direct

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... ischarge of waste water in the river and lake bodies, the water gets polluted and affects the aquatic life and also causes a lot of water epidemic diseases. This affects the water quality and ecology. Factors such as types of industries, habits of people and non-point sources are responsible for the increase of the wastewater discharged into water body. Increase in globalization and industrialization country faces the various challenges for providing clean and safe water to the public. In terms of its quick growth and development, Pune city becomes one of the growing and emerging cities of India. More and additional individuals from outside city are migrating into Pune town. The population increase in Pune throughout the last 2-3 decades has been significantly fast with a resultant outcome on the rise of pollution level. In this paper study is concentrated on Katraj Lake water pollution and curative measures. It is a perennial urban pond, located close to temple and encircled by the city slum and human habitation, that is employed by inhabiting individuals around it for numerous activities like bathing, fishing, washing clothes, and dumping sewages etc. The focus of this study is to analyse physical and chemical properties of lake water so that quality of discharged water is improved. Also to design water treatment plant to reuse lake water as an emergency supply in nearby area. Generally, in summer season there is always scarcity of water in Katraj Area. We can use this treated water wherever required for domestic purpose by tankers