Chloride in the form of chloride ion (Cl^-) is one of the major inorganic anions in water and waste water. The chloride concentration is higher in waste water than in raw water because sodium chloride (NaCI) is a common article of diet and passes unchanged through the digestive system. Alkalinity and hardness depends on the salts present in the water it determines the flora and fauna in the aquatic habitat. This paper details the Chlorine, Alkalinity, Hardness of lake water in Bangalore.