A lake is an area which is filled with water localized in a basin that is surrounded by land other outlet that serves to feed as drain the lake. Lakes are not part of the ocean but it lie on land and therefore they are distinct from lagoons. Lakes are an important water resource found on this planet. Lake water is source for drinking and many of the domestic use in rural and urban population of India. The main aim of current study was to assess water quality of kotiteertha lake, Gokarna a holy

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... lace situated in Karnataka. Water samples were collected in winter season of Costal Karnataka. Due to increased population and manmade activities and performing rituals, water is being highly polluted with different types of contaminates 1. The water samples were collected at five different selected sampling sites. The assessment of physico chemical parameters of Kotiteertha lake water was done during January 2018.It is very necessary to know details about different parameters like pH , temperature, turbidity , alkalinity, hardness, conductivity, sulphate, TS,TDS,TSS, DO,BOD etc. At the end of the results obtained from different physic-chemical parameters we came to know that Kotithirta lake has been declared as class E types of lake according to classification laid by CPCB. The lake water is not suitable for drinking purpose as per criteria laid down by the IS 10500:2012 without filtration or necessary pre treatments.