NASDAQ:ADES A Leader in Clean Coal Technology Knight Clean Coal Conference April 1, 2009 Boston, MA © Copyright 2009 ADA-ES, Inc. All rights reserved. Exhibit 99.1

-2- Please note that this presentation contains forward-looking statements within the meaning of U.S. securities laws, including statements relating to coal; future bids, contracts, projects, project funding and revenues; statements regarding the new activated carbon (AC) facilities we are building and our ability to supply AC; the likelihood, timing and impact of new laws and court rulings on our target markets; and anticipated sizes of and growth in our target markets. These forward-looking statements involve significant risks and uncertainties that could cause the actual results to differ materially from those anticipated by these statements, including failure to raise additional financing; termination of agreements; failure to satisfy conditions in the equity financing agreements for the AC facilities; inability to sign or close acceptable coal supply or off-take agreements in a timely manner; changes in the costs and timing of construction of the planned AC facilities; availability and cost of raw materials, equipment and facilities; changes in laws or regulations, prices, economic conditions and market demand; impact of competition and litigation; decreases in the use of coal for electricity; results of product demonstrations; technical and operational difficulties; availability of skilled personnel and other factors discussed in greater detail in our filings with the SEC. You are cautioned not to place undue reliance on our forward-looking statements. These statements are presented as of the date made, and we disclaim any duty to update them unless required by law to do so.

-3- Clean Coal Technology Coal is an abundant, cheap, and secure fuel that provides over 50% of electricity in the US 1,100 coal-fired boilers in the U.S. ADA provides the technology to burn it cleaner Senior staff are industry recognized experts – 30-year track record of developing and then commercializing technologies Positioned to take advantage of public and political support for Clean Coal Technologies

-4- Investment Highlights Two Significant Avenues of Growth: Activated Carbon Injection (“ACI”) is deemed maximum achievable control technology (MACT) for the removal of mercury from flue gas streams ADA is a current market leader for ACI equipment and engineering services Existing regulations create $200-400 million activated carbon (“AC”) market Federal regulations being developed by EPA and Congress likely to lead to $1 billion market for AC ADA has started construction of the largest, most efficient AC manufacturing facility in North America Developing capture technology for greenhouse gas CO 2 Recently started work under $3.2 million DOE and utility funded program to develop new technology Over $3 billion allocated in the American Recovery and Reinvestment Act for carbon capture and storage Mercury Control CO 2 Control

-5- GROWTH AREA #1: Mercury Control

-6- Business Plan in Action for Mercury Control Stage 1: ADA demonstrated ACI with $80 million from DOE and leading utilities: Regulations followed. Stage 2: After market was created by regulations, ADA became a leader in the sale of ACI equipment: approximately $1 million per boiler. Stage 3: Provide AC to utilities for a continuous revenue source: approximately $2 million per year per boiler. 2009-10: Building AC production line; sourcing AC from third parties for treating, storing and selling to utilities. 2010: Activated Carbon Production Line commences operations.

-7- AC Market Drivers: Regulations for Mercury Control Existing rules create $200 - 400 million AC market

-8- New Federal Legislation Likely in US 2/6/09: EPA announced it will proceed with MACT mercury reduction standards Senate pursuing multi-pollutant legislation for SO 2 , NO x and Mercury, and possibly CO 2 Canadian-wide mercury standard has been passed Expected to create $1 billion AC market

-9- ACI Equipment Sales: Status Contracts for over 110 ACI systems have been awarded by power companies to date – ADA market share: approximately 32% – The rest are split between 7 or 8 other companies A total of 150 systems will be needed to meet current state regulations Additional ~ 450 systems expected with federal regulation Working closely with largest utilities in the U.S. and Canada Key supplier of mercury control technology to major air pollution control companies – Babcock and Wilcox, Alstom Power, Hamon Research Cottrell and Hitachi, among others

-10- New Market for Activated Carbon Created by Mercury Control 0 500 1,000 Activated Carbon (millions of lbs / yr) Current H20 AC Market Developing Market for Hg Control 2006 2010E 2015E ANNUAL U.S. MARKET Significant production gap Based on existing regulations Based on anticipated Federal regulation

Development Project Organization (assumes ECP purchase of Convertible Preferred Shares) ADA - ES Energy Capital Partners (ECP) Underwood Environmental Products, LLC Morton Environmental Products, LLC Red River Environmental Products, LLC ADA Carbon Solutions, LLC* 60% Debt Parent Companies Development Company Project Companies Crowfoot Supply Company, LLC 35% Owner -11- *Expected to change to ADA-ES: 30%, ECP: 70%. Dependent upon final financing values. 50% 50%

Provided by Energy Capital Partners -12-

ADA-ES New Activated Carbon Production ADA-ES New Activated Carbon Production Building largest AC plant(s) in North America Each production line will produce approx.150 mm lbs/yr Capital cost: approx. $360 mm 3-5 year development process: – Under construction and on schedule Red River, LA plant startup target: mid-2010 Permitted for 2 nd production line -13-

-14- Potential for Up to Six Production Lines Two lines permitted adjacent to Red River Mine in Louisiana Permits filed for two lines at a site near Bismarck, ND Developing additional sites near coal sources to minimize feedstock costs

-15- Equity Financing for AC Plant Equity investment by ADA and Energy Capital Partners (ECP) to date: $25.5 mm each – Ownership structure for 1 st production line expected to be: ADA 30%, ECP 70% (depending upon final capital costs and debt leverage) – ADA has right to 50/50 participation in ownership of 2 nd through 6 th production lines ECP expected to fund the JV until closing of its purchase of 3.6 mm Convertible Preferred ADA shares at an average price of approx. $6.30 ECP has the right to provide additional equity at the project level as necessary

-16- Debt Financing for AC Plant Credit Suisse coordinating debt placement Because of current conditions in the financial market, debt financing will be delayed until improved market conditions later in 2009 Equity continues to fund construction activities keeping project on schedule – Weak credit markets have had no adverse impact on project funding to date

-17- Interim AC Supply Plans Currently supplying AC to utilities prior to new plant start-up Sourcing high-quality AC AC processing and storage facility under construction in Natchitoches Parish, LA; Construction expected to be completed in Q2’09 – 40,000 sq. ft. facility w/ processing capacity of 8,000 lb/hr of Powdered AC – Facility will complement ADA’s AC production plant in Red River Parish, LA – Equipment purchased to chemically treat, mill, package, and store AC – Easy access to rail and barge transportation – Scalable for additional long-term processing and storage capacity Project led by industry veterans – John Rectenwald – 27 years AC operations and manufacturing – Steve Young – 35 years AC experience in engineering and production First test of ADA-provided AC achieved 90% mercury capture

-18- Expected Sales of Activated Carbon ADA will recognize revenues or income based on the final ownership structure of the 1 st and subsequent production lines $0 $50 $100 $150 $200 $250 2009 2010 2011 2012 2013 2014 2nd Line 1st Line Interim

GROWTH AREA #2: Control of Greenhouse Emissions: Carbon Dioxide -19-

Carbon Capture and Storage (CCS) International, Federal, and State Regulations are being proposed requiring 50% to 80% reduction in CO 2 emissions Requires development of technology to capture carbon from existing plants -20- 0 100 200 300 400 1 50% CO2 Reduction New

ADA-ES CO 2 Capture Technology Designed to capture CO 2 from flue gas in conventional coal- fired boilers Based on regenerable solid sorbents - advantages over competing technologies: – For the customer: lower cost and less parasitic energy – For ADA: continuous revenues from sale of proprietary chemical sorbents $3.2 million DOE R&D program with extensive industry support – Southern Company – Luminant – American Electric Power – Xcel Energy – Electric Power Research Institute Over $3 billion allocated in the American Recovery and Reinvestment Act for carbon capture and storage -21-

Post-Combustion Capture Emission Control SO 2 , NO x , Hg, Particulate STEAM WATER Coal* 50% C 20% H2O 12% O2 5% Ash 3% H2 (S, Hg) *Coal composition varies greatly with grade and source. CO 2 Capture Air 78% N2 21% O2 Purified CO 2 to Storage Regeneration Flue Gas 12% CO 2 74% N 2 12% H 2 O 4% O 2 -22-

Financial Highlights Cash flow positive on an annual basis 2003-2007 Revenue CAGR of 35%, 2003 -2007 2008 ACI revenues flat, impacted by CAMR and CAIR vacaturs As of 12/31/08: – 6.8 mm diluted shares outstanding – 50%+ held by institutions – ~10% held by insiders and employees Balance sheet highlights (at 12/31/08): – Cash & equivalents of ~$28 mm – Working capital of ~$18 mm – No long-term debt – Shareholders’ equity of ~$32 mm Market cap: $18.2 mm (03/24/09) -23-

Summary ADA-ES instrumental in creating mercury control market – Existing rules: estimated 150 ACI systems, 400 million lbs/yr of AC - $200- 400 mm market – Pending Federal Rule: estimated 600-700 ACI systems, 1 billion lbs/yr of AC - $1 billion market Leading provider of engineering services and equipment for the mercury control market Building new AC plant for this market; expected to come online mid-2010 – Construction started in August 2008 – Energy Capital Partners I, LP and its affiliated funds providing equity financing – Debt to be supported by long-term off-take contracts – In negotiations for additional contracted volume – Supplied bids for over $500 mm in AC with new RFPs Developing carbon capture technology -24-