Water activity of treated sample reduced due to osmotic dehydration of papaya at different sucrose concentration. It can be concluded that the value of water activity (aw) decreases with increase in sugar concentration. Since the sucrose hydrolysis reduced the water activity aw more than the desired, which was an additional safety factor for the preservation of minimally processed papaya. Reducing the water activity of samples also decreases the non-enzymatic browning reaction (Krokida et al., 2000). But during storage there is slight increase in the value of water activity.