These heavy metals present in waste water are not only toxic but are non-biodegradable which make their presence even worse. When this heavy metals containing water is used for irrigation, they enter into the plants and vegetables, where they do not have any significant biological role but causes various adverse effects to them . Their bioaccumulation in plants has reported to inhibit the growth of the plants Bioaccumulation of various heavy metals such as arsenic, mercury, lead and chromium will tear down the metabolic processes involved in the human body.