ADA-ES, Inc., together with its subsidiaries, provides environmental technologies and specialty chemicals to the coal-burning electric power generation industry in the United States. The company develops and markets refined coal technologies, including leasing of RC facilities for control of nitrous oxides and mercury. It also engages in the development and sale of systems, field testing, chemicals, and services primarily related to control of emissions of mercury, acid gases, sulfur dioxide, and particulate matter for coal and solid fuel fired boilers used in electric generation. In addition, the company is involved in the research and development of carbon dioxide capture technology through contracts; and development of a technology that allows coal to be burned with lower mercury emissions. Further, it sells coal; supplies emissions control systems, including powdered activated carbon injection systems and dry sorbent injection systems to control SO2 and other acid gases; sells specialty chemicals, equipment, and services for flue gas conditioning projects; and licenses technology and provides consulting services related to such matters and other applications. The company was founded in 1996 and is based in Highlands Ranch, Colorado.