Pure Water. Clean Air. Better World. Calgon Carbon is an acknowledged leader – nearly 75 years in production - in the activated carbon and reactivation industry for many liquid and vapor phase applications, with complementary expertise in ultraviolet disinfection and oxidation, ion exchange technology, and ballast water treatment. Calgon Carbon Asia (subsidiary of Calgon Carbon Corporation) is a marketing headquarter office based in Singapore, serving customers in Asia region, including, South Korea, Taiwan, Hong Kong, South East Asia, Greater India, Australia & New Zealand.