Water crisis has become a part of our life. This is not altogether due to shortage of rain fall. Increasing population, growing industrialization, expanding urbanization, agriculture etc. demand more and more water. Coping up with these developments requires various tactics to overcome the water shortage and satisfy the need of all. The main activity in this direction is to decrease the pollution level of discharged effluents and treatment of contaminated water to acceptable quality. In this context, the role of electrochemistry to environmental applications is expanding due to the characteristics of electrochemical processes viz., versatility, energy efficiency, environmental compatibility, cost effectiveness etc. The growth of electrocatalysts and electrochemical engineering in the past two decades has made a total revolution in the electrode and cell design technologies that are particularly important for water and effluent treatment. In this review, brief accounts of a few successful electrochemical technologies are presented.