ADA-ES Awarded Contract for Two Mercury Control Systems.

LITTLETON, Colo. -- ADA-ES, Inc. (NASDAQ: ADES) today announced that it has been awarded a contract to begin engineering on two activated carbon injection ("ACI") systems for mercury control at two coal-fired units at a power plant in the midwestern United States. The existing generating unit produces 670 megawatts of electricity. The other unit is under construction and is designed to produce 850 megawatts of power. Both units will utilize low sulfur coal from the Powder River Basin (PRB) region of Wyoming. ADA-ES expects to deliver the systems to the plant during 2008.

"This new contract marks our eighteenth and nineteenth commercial ACI systems awarded to date, with seven systems awarded already in 2007 and options on another six pending," said Dr. Michael Durham, President of ADA-ES. "Sales activities in this area have really accelerated this year. We are currently working on several multi-unit fleet proposals for ACI systems. We believe electrical utilities have concluded that ACI systems are viable, commercially available and an economic way to address their mercury emissions control needs. We expect demand for our systems to continue to build throughout this year and 2008 in order to meet implementation deadlines for recently passed State regulations."

About ADA-ES

Headquartered in Littleton, Colorado, ADA-ES, Inc. develops and implements proprietary environmental technology and specialty chemicals that mitigate the environmental impacts from electric power and industrial companies, while reducing their operating costs.

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, which provide a "safe harbor" for such statements in certain circumstances. These statements include the Company's expectations regarding production levels expected at the plant under construction, the expected delivery dates for the two ACI systems and expected increases in demand for ACI systems. Such statements involve significant uncertainties. Actual events or results could differ materially from those discussed in the forward-looking statements as a result of various factors including but not limited to changing economic conditions and market demand for ADA-ES' products and services, changes in technology, failure to satisfy performance guarantees, changes in federal and state laws or regulations, results of demonstrations of the Company's and licensed third party technologies, operational difficulties, availability of skilled personnel, and other factors discussed in the Company's filings with the U.S. Securities and Exchange Commission. The forward looking statements contained in this press release are presented as of the date hereof, and we disclaim any duty to update such statements unless required by law to do so.