Normally, a flow of surface water draining through humid area contains more calcium than any other ion. Calcium is the most common cation in fresh water at 200c, 5.6 mg/lit dissolve. Causing pH 9.9 to 10.0. As calcium ion is relatively large, it can be hydrated & forms complexes with inorganic ions. To calculate the concentration of calcium in the present study the discharge of industrial effluent (water sample) in the vicinity of sugar factory were collected and analyzed every month throughout the year. So, we have studied the calcium present in industrial effluent (water sample). Calcium was extremely low was 3.21 mg/lit.