Calgon wants impurities in water and air to be gone. Calgon Carbon makes activated carbons and purification systems and offers purification, separation, and concentration services to industrial process and environmental markets. It is a global leader in activated carbon, ballast water treatment, ultraviolet light disinfection, and advanced ion-exchange technologies used in the treatment of drinking water, wastewater, ballast water, air emissions, and manufacturing processes. Calgon Carbon offers carbon technologies used in more than 700 discrete market applications including air, drinking water, foods, and pharmaceuticals purification, and the removal of mercury emissions from coal-powered electrical plants.