---

United States

Securities and Exchange Commission

Washington, D.C. 20549

FORM 10-Q

(Mark One)

|x | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------------------------

For the quarterly period ended September 30, 2007

or



| ̈ | TRANSITION REPORT PURSUANT TO 13 OR 15(d) OF THE EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------

For the transition period from  to

Commission
File Number: 000-50216

ADA-ES, INC.

(Exact name of registrant as specified in its charter)



|                                                               |  |                                     
|-------------------------------------------------------------- |  | ------------------------------------
|Colorado                                                       |  | 84-1457385                          
|(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)



|                                           |  |           
|------------------------------------------ |  | ----------
|8100 SouthPark Way, B, Littleton, Colorado |  | 80120     
|(Address of principal executive offices)   |  | (Zip Code)

(303) 734-1727

(Registrants telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter
period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes   x    No ̈

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of accelerated filer and large accelerated filer in Rule 12b-2
of the Exchange Act. (Check one):

Large accelerated filer ̈Accelerated filer   x     Non-accelerated filer ̈

Indicate by check mark whether the registrant is a shell company (as defined
in Rule 12b-2 of the Exchange Act). (Check one):     Yes ̈No  x

APPLICABLE ONLY TO ISSUERS INVOLVED IN BANKRUPTCY PROCEEDINGS DURING THE PRECEDING

FIVE YEARS:

Indicate by check mark whether the registrant
has filed all documents and reports required to be filed by Sections 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.
    Yes ̈No ̈

APPLICABLE ONLY TO CORPORATE ISSUERS:

Indicate the number of shares outstanding of each of the issuers classes of common stock, as of the latest practicable date.



|                           |  |                                
|-------------------------- |  | -------------------------------
|Class                      |  | Outstanding at November 2, 2007
|Common Stock, no par value |  | 5,676,249                      



---



---

PART I - FINANCIAL INFORMATION



|Item 1. | Condensed Financial Statements.
|------- | -------------------------------

ADA-ES, Inc.
and Subsidiaries

Condensed Consolidated Balance Sheets

(Amounts in thousands, except share data)



|                                                                                                                |  |                   |        |   |                  |   |        |  
|--------------------------------------------------------------------------------------------------------------- |  | ----------------- | ------ | - | ---------------- | - | ------ | -
|                                                                                                                |  | September 30,2007 |        |   | December 31,2006 |  
|                                                                                                                |  | (Unaudited)       |        |   |                  |  
|ASSETS                                                                                                          | 
|CURRENT ASSETS:                                                                                                 |  |                   |        |   |                  |   |        |  
|Cash and cash equivalents                                                                                       |  | $                 | 14,389 |   |                  | $ | 16,129 |  
|Trade receivables, net of allowance for doubtful accounts of $39 and $4, respectively                           |  |                   | 5,752  |   |                  |   | 3,522  |  
|Investments in securities                                                                                       |  |                   | 2,080  |   |                  |   | 2,427  |  
|Prepaid expenses and other                                                                                      |  |                   | 292    |   |                  |   | 361    |  
|                                                                                                                |  |                   |        |   |                  |   |        |  
|Total current assets                                                                                            |  |                   | 22,513 |   |                  |   | 22,439 |  
|                                                                                                                |  |                   |        |   |                  |   |        |  
|PROPERTY AND EQUIPMENT,at cost                                                                                  |  |                   | 2,557  |   |                  |   | 1,830  |  
|Less accumulated depreciation and amortization                                                                  |  |                   | (1,264 | ) |                  |   | (1,033 | )
|                                                                                                                |  |                   |        |   |                  |   |        |  
|Net property and equipment                                                                                      |  |                   | 1,293  |   |                  |   | 797    |  
|                                                                                                                |  |                   |        |   |                  |   |        |  
|GOODWILL, net of $1,556 in amortization                                                                         |  |                   | 2,024  |   |                  |   | 2,024  |  
|INTANGIBLE ASSETS, net of $38 and $57, respectively, in amortization                                            |  |                   | 248    |   |                  |   | 241    |  
|INVESTMENTS IN SECURITIES                                                                                       |  |                   | 2,781  |   |                  |   | 5,322  |  
|DEVELOPMENT PROJECTS AND OTHER
ASSETS                                                                           |  |                   | 6,309  |   |                  |   | 931    |  
|                                                                                                                |  |                   |        |   |                  |   |        |  
|TOTAL ASSETS                                                                                                    |  | $                 | 35,168 |   |                  | $ | 31,754 |  
|                                                                                                                |  |                   |        |   |                  |   |        |  
|LIABILITIES AND STOCKHOLDERS EQUITY                                                                            |  |                   |        |   |                  |   |        |  
|CURRENT LIABILITIES:                                                                                            |  |                   |        |   |                  |   |        |  
|Accounts payable                                                                                                |  | $                 | 4,085  |   |                  | $ | 2,352  |  
|Accrued payroll and related liabilities                                                                         |  |                   | 681    |   |                  |   | 618    |  
|Deferred revenue and other                                                                                      |  |                   | 1,777  |   |                  |   | 922    |  
|                                                                                                                |  |                   |        |   |                  |   |        |  
|Total current liabilities                                                                                       |  |                   | 6,543  |   |                  |   | 3,892  |  
|                                                                                                                |  |                   |        |   |                  |   |        |  
|LONG-TERM LIABILITIES:                                                                                          |  |                   |        |   |                  |   |        |  
|Deferred warranty and other                                                                                     |  |                   | 276    |   |                  |   | 184    |  
|                                                                                                                |  |                   |        |   |                  |   |        |  
|Total liabilities                                                                                               |  |                   | 6,819  |   |                  |   | 4,076  |  
|                                                                                                                |  |                   |        |   |                  |   |        |  
|MINORITY INTEREST                                                                                               |  |                   | 37     |   |                  |   | 37     |  
|COMMITMENTS AND CONTINGENCIES                                                                                   |  |                   |        |   |                  |   |        |  
|STOCKHOLDERS EQUITY:                                                                                           |  |                   |        |   |                  |   |        |  
|Preferred stock; 50,000,000 shares authorized, none outstanding                                                 |  |                   |       |   |                  |   |       |  
|Common stock; no par value, 50,000,000 shares authorized, 5,648,028 and 5,635,137 shares issued and outstanding |  |                   | 27,973 |   |                  |   | 27,592 |  
|Accumulated other comprehensive income                                                                          |  |                   | 210    |   |                  |   | 167    |  
|Retained earnings (accumulated deficit)                                                                         |  |                   | 129    |   |                  |   | (118   | )
|                                                                                                                |  |                   |        |   |                  |   |        |  
|Total stockholders equity                                                                                      |  |                   | 28,312 |   |                  |   | 27,641 |  
|                                                                                                                |  |                   |        |   |                  |   |        |  
|TOTAL LIABILITIES AND STOCKHOLDERS
EQUITY                                                                      |  | $                 | 35,168 |   |                  | $ | 31,754 |  
|                                                                                                                |  |                   |        |   |                  |   |        |  

See accompanying notes.



1



---

ADA-ES, Inc. and Subsidiaries

Condensed Consolidated Statements of Operations and Comprehensive Income

(Amounts in thousands, except per share data)

(Unaudited)



|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|-------------------------------------------------------------------------------- |  | -------------------------------- | ----- | - | ------------------------------- | - | ----- | ---- |  | - | ------ | - |  | - | ------ | -
|                                                                                 |  | Three Months Ended September 30, |       |   | Nine Months Ended September 30, |  
|                                                                                 |  | 2007                             |       |   | 2006                            |   |       | 2007 |  |   | 2006   |  
|REVENUE:                                                                         |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|Mercury emission control                                                         |  | $                                | 5,144 |   |                                 | $ | 4,120 |      |  | $ | 13,382 |   |  | $ | 9,875  |  
|Flue gas conditioning and other                                                  |  |                                  | 457   |   |                                 |   | 328   |      |  |   | 1,065  |   |  |   | 1,528  |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|Total net revenues                                                               |  |                                  | 5,601 |   |                                 |   | 4,448 |      |  |   | 14,447 |   |  |   | 11,403 |  
|COST OF REVENUES:                                                                |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|Mercury emission control                                                         |  |                                  | 3,521 |   |                                 |   | 2,835 |      |  |   | 9,020  |   |  |   | 6,588  |  
|Flue gas conditioning and other                                                  |  |                                  | 209   |   |                                 |   | 323   |      |  |   | 640    |   |  |   | 1,003  |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|Total cost of revenues                                                           |  |                                  | 3,730 |   |                                 |   | 3,158 |      |  |   | 9,660  |   |  |   | 7,591  |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|GROSS MARGIN                                                                     |  |                                  | 1,871 |   |                                 |   | 1,290 |      |  |   | 4,787  |   |  |   | 3,812  |  
|OTHER COSTS AND EXPENSES:                                                        |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|General and administrative                                                       |  |                                  | 1,419 |   |                                 |   | 974   |      |  |   | 4,075  |   |  |   | 2,736  |  
|Research and development                                                         |  |                                  | 322   |   |                                 |   | 308   |      |  |   | 1,001  |   |  |   | 922    |  
|Depreciation and amortization                                                    |  |                                  | 96    |   |                                 |   | 71    |      |  |   | 263    |   |  |   | 193    |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|Total expenses                                                                   |  |                                  | 1,837 |   |                                 |   | 1,353 |      |  |   | 5,339  |   |  |   | 3,851  |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|OPERATING INCOME (LOSS)                                                          |  |                                  | 34    |   |                                 |   | (63   | )    |  |   | (552   | ) |  |   | (39    | )
|OTHER INCOME:                                                                    |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|Minority interest in loss of consolidated subsidiary                             |  |                                  | 34    |   |                                 |   |      |      |  |   | 129    |   |  |   |       |  
|Other expense                                                                    |  |                                  |      |   |                                 |   | (412  | )    |  |   |       |   |  |   | (412   | )
|Interest and other income                                                        |  |                                  | 215   |   |                                 |   | 270   |      |  |   | 750    |   |  |   | 658    |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|Total other income (expense)                                                     |  |                                  | 249   |   |                                 |   | (142  | )    |  |   | 879    |   |  |   | 246    |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|INCOME (LOSS) BEFORE TAX                                                         |  |                                  | 283   |   |                                 |   | (205  | )    |  |   | 327    |   |  |   | 207    |  
|PROVISION FOR TAX BENEFIT (EXPENSE)                                              |  |                                  | (68   | ) |                                 |   | 77    |      |  |   | (80    | ) |  |   | (53    | )
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|NET INCOME (LOSS)                                                                |  |                                  | 215   |   |                                 |   | (128  | )    |  |   | 247    |   |  |   | 154    |  
|UNREALIZED GAINS ON CERTAIN INVESTMENTS IN
DEBT AND EQUITY SECURITIES,net of tax |  |                                  | 44    |   |                                 |   | 101   |      |  |   | 43     |   |  |   | 87     |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|COMPREHENSIVE INCOME (LOSS)                                                      |  | $                                | 259   |   |                                 | $ | (27   | )    |  | $ | 290    |   |  | $ | 241    |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|NET INCOME (LOSS) PER COMMON SHARE 
BASIC AND DILUTED                           |  | $                                | 0.04  |   |                                 | $ | (0.02 | )    |  | $ | 0.04   |   |  | $ | 0.03   |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|WEIGHTED AVERAGE COMMON SHARES OUTSTANDING                                       |  |                                  | 5,642 |   |                                 |   | 5,627 |      |  |   | 5,641  |   |  |   | 5,622  |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  
|WEIGHTED AVERAGE DILUTED COMMON SHARES
OUTSTANDING                               |  |                                  | 5,676 |   |                                 |   | 5,627 |      |  |   | 5,732  |   |  |   | 5,795  |  
|                                                                                 |  |                                  |       |   |                                 |   |       |      |  |   |        |   |  |   |        |  

See accompanying notes.



2



---

ADA-ES, Inc. and Subsidiaries

Condensed Consolidated Statements of Changes in Stockholders Equity

Nine Months Ended September 30, 2007 and 2006

(Amounts in thousands)

(Unaudited)



|                                                                        |  |              |  |                                       |        |  |                                        |     |   |       |   |      |   |  |   |        |  
|----------------------------------------------------------------------- |  | ------------ |  | ------------------------------------- | ------ |  | -------------------------------------- | --- | - | ----- | - | ---- | - |  | - | ------ | -
|                                                                        |  | COMMON STOCK |  | ACCUMULATED OTHERCOMPREHENSIVE INCOME |        |  | (ACCUMULATEDDEFICIT) RETAINED EARNINGS |     |   | TOTAL |  
|                                                                        |  | SHARES       |  | AMOUNT                                |        |  |                                       
|BALANCES, January 1, 2006                                               |  | 5,610        |  | $                                     | 26,318 |  | $                                      | 33  |   |       | $ | (495 | ) |  | $ | 25,856 |  
|Stock and stock options issued to consultant and directors for services |  | 7            |  |                                       | 157    |  |                                        |    |   |       |   |     |   |  |   | 157    |  
|Stock-based compensation                                                |  |             |  |                                       | 249    |  |                                        |    |   |       |   |     |   |  |   | 249    |  
|Issuance of stock on exercise of options                                |  | 10           |  |                                       | 81     |  |                                        |    |   |       |   |     |   |  |   | 81     |  
|Unrealized holding gains on investments                                 |  |             |  |                                       |       |  |                                        | 140 |   |       |   |     |   |  |   | 140    |  
|Income tax effect                                                       |  |             |  |                                       |       |  |                                        | (53 | ) |       |   |     |   |  |   | (53    | )
|Net income                                                              |  |             |  |                                       |       |  |                                        |    |   |       |   | 154  |   |  |   | 154    |  
|                                                                        |  |              |  |                                       |        |  |                                        |     |   |       |   |      |   |  |   |        |  
|BALANCES, September 30, 2006                                            |  | 5,627        |  | $                                     | 26,805 |  | $                                      | 120 |   |       | $ | (341 | ) |  | $ | 26,584 |  
|                                                                        |  |              |  |                                       |        |  |                                        |     |   |       |   |      |   |  |   |        |  
|BALANCES, January 1, 2007                                               |  | 5,635        |  | $                                     | 27,592 |  | $                                      | 167 |   |       | $ | (118 | ) |  | $ | 27,641 |  
|Stock issued to consultant for services                                 |  | 2            |  |                                       | 20     |  |                                        |    |   |       |   |     |   |  |   | 20     |  
|Stock-based compensation                                                |  |             |  |                                       | 254    |  |                                        |    |   |       |   |     |   |  |   | 254    |  
|Issuance of stock on exercise of options                                |  | 11           |  |                                       | 107    |  |                                        |    |   |       |   |     |   |  |   | 107    |  
|Unrealized holding gains on investments                                 |  |             |  |                                       |       |  |                                        | 69  |   |       |   |     |   |  |   | 69     |  
|Income tax effect                                                       |  |             |  |                                       |       |  |                                        | (26 | ) |       |   |     |   |  |   | (26    | )
|Net income                                                              |  |             |  |                                       |       |  |                                        |    |   |       |   | 247  |   |  |   | 247    |  
|                                                                        |  |              |  |                                       |        |  |                                        |     |   |       |   |      |   |  |   |        |  
|BALANCES, September 30, 2007                                            |  | 5,648        |  | $                                     | 27,973 |  | $                                      | 210 |   |       | $ | 129  |   |  | $ | 28,312 |  
|                                                                        |  |              |  |                                       |        |  |                                        |     |   |       |   |      |   |  |   |        |  

See accompanying notes.



3



---

ADA-ES, Inc. and Subsidiaries

Condensed Consolidated Statements of Cash Flows

(Amounts in thousands)

(Unaudited)



|                                                                                  |  |                                 |        |   |      |   |        |  
|--------------------------------------------------------------------------------- |  | ------------------------------- | ------ | - | ---- | - | ------ | -
|                                                                                  |  | Nine Months Ended September 30, |       
|                                                                                  |  | 2007                            |        |   | 2006 |  
|CASH FLOWS FROM OPERATING ACTIVITIES:                                             |  |                                 |        |   |      |   |        |  
|Net income                                                                        |  | $                               | 247    |   |      | $ | 154    |  
|Adjustments to reconcile net income to net cash provided by operating activities: |  |                                 |        |   |      |   |        |  
|Depreciation and amortization                                                     |  |                                 | 263    |   |      |   | 193    |  
|Loss on asset dispositions and securities                                         |  |                                 | 9      |   |      |   | 34     |  
|Deferred tax expense                                                              |  |                                 | 80     |   |      |   | 53     |  
|Expenses paid with stock and stock options                                        |  |                                 | 274    |   |      |   | 406    |  
|Minority interest in loss of subsidiary                                           |  |                                 | (129   | ) |      |   |       |  
|Changes in operating assets and liabilities:                                      |  |                                 |        |   |      |   |        |  
|Trade receivables, net                                                            |  |                                 | (2,230 | ) |      |   | (86    | )
|Prepaid expenses and other                                                        |  |                                 | 69     |   |      |   | (32    | )
|Accounts payable                                                                  |  |                                 | 1,733  |   |      |   | 841    |  
|Deferred revenue and accrued expenses                                             |  |                                 | 836    |   |      |   | (242   | )
|Other liabilities                                                                 |  |                                 | 92     |   |      |   | 390    |  
|                                                                                  |  |                                 |        |   |      |   |        |  
|Net cash provided by operating activities                                         |  |                                 | 1,244  |   |      |   | 1,711  |  
|                                                                                  |  |                                 |        |   |      |   |        |  
|CASH FLOWS FROM INVESTING ACTIVITIES:                                             |  |                                 |        |   |      |   |        |  
|Capital expenditures for equipment and other assets                               |  |                                 | (801   | ) |      |   | (419   | )
|Development project expenditures                                                  |  |                                 | (5,378 | ) |      |   | (344   | )
|Investment in securities                                                          |  |                                 | (2,970 | ) |      |   | (5,485 | )
|Proceeds from sale of securities and certificates of deposit                      |  |                                 | 5,929  |   |      |   | 6,104  |  
|                                                                                  |  |                                 |        |   |      |   |        |  
|Net cash used in investing activities                                             |  |                                 | (3,220 | ) |      |   | (144   | )
|                                                                                  |  |                                 |        |   |      |   |        |  
|CASH FLOWS FROM FINANCING ACTIVITIES:                                             |  |                                 |        |   |      |   |        |  
|Payments on debt and notes payable                                                |  |                                 |       |   |      |   | (4     | )
|Minority interest capital contribution                                            |  |                                 | 129    |   |      |   |       |  
|Exercise of stock options                                                         |  |                                 | 107    |   |      |   | 81     |  
|                                                                                  |  |                                 |        |   |      |   |        |  
|Net cash provided by financing activities                                         |  |                                 | 236    |   |      |   | 77     |  
|                                                                                  |  |                                 |        |   |      |   |        |  
|INCREASE (DECREASE) IN CASH AND CASH
EQUIVALENTS                                  |  |                                 | (1,740 | ) |      |   | 1,644  |  
|CASH AND CASH EQUIVALENTS, beginning of
period                                    |  |                                 | 16,129 |   |      |   | 14,026 |  
|                                                                                  |  |                                 |        |   |      |   |        |  
|CASH AND CASH EQUIVALENTS, end of period                                          |  | $                               | 14,389 |   |      | $ | 15,670 |  
|                                                                                  |  |                                 |        |   |      |   |        |  
|SUPPLEMENTAL SCHEDULE OF CASH FLOW
INFORMATION:                                   |  |                                 |        |   |      |   |        |  
|Cash payments for interest                                                        |  | $                               |       |   |      | $ | 1      |  
|                                                                                  |  |                                 |        |   |      |   |        |  
|Cash payments for taxes                                                           |  | $                               | 219    |   |      | $ |       |  
|                                                                                  |  |                                 |        |   |      |   |        |  
|SUPPLEMENTAL SCHEDULE OF NON-CASH FLOW
FINANCING ACTIVITIES:                      |  |                                 |        |   |      |   |        |  
|Stock and stock options issued for services                                       |  | $                               | 274    |   |      | $ | 406    |  
|                                                                                  |  |                                 |        |   |      |   |        |  

See accompanying notes.



4



---

ADA-ES, Inc. and Subsidiaries

Notes to Condensed Consolidated Financial Statements (Unaudited)

September 30, 2007



|(1) | Basis of Presentation
|--- | ---------------------

ADA-ES, Inc. (ADA), its wholly owned
subsidiary, ADA Environmental Solutions, LLC (ADA LLC), Red River Environmental Products, LLC, Bowman Environmental Products, LLC and our 50% joint venture interest in Clean Coal Solutions, LLC (Clean Coal), collectively, are referred to as the
Company. The Company is principally engaged in providing environmental technologies and specialty chemicals to the coal-burning utility industry. The Company generates a substantial part of its revenue from contracts co-funded by the government and
industry. The Companys sales occur principally throughout the United States.

The accompanying condensed Balance Sheet as of December 31, 2006,
was derived from audited financial statements and the unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial statements and with the
instructions to Form 10-Q and Article 10 of Regulation S-X and, therefore, do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. The condensed consolidated
financial statements include the financial statements of ADA, its subsidiaries and Clean Coal. We have eliminated all significant intercompany balances and transactions in consolidation.

In the opinion of management, the condensed consolidated financial statements include all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation of the results of
operations, financial position and cash flows for the interim periods presented. Operating results for the nine months ended September 30, 2007 are not necessarily indicative of the results that may be expected for the year ending
December 31, 2007.

These statements should be read in conjunction with the consolidated financial statements and related notes to consolidated
financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2006. Certain prior period amounts have been reclassified to be consistent with the current presentation. The accounting policies used in preparing
these condensed consolidated financial statements are the same as those described in our Form 10-K.

We prepare our condensed consolidated financial
statements in conformity with U.S. generally accepted accounting principles. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of
contingent assets and liabilities at the date of the financial statements, and the reported amounts of sales and expenses during the reporting period. Actual results could differ from those estimates.



|(2) | Net Income Per Share
|--- | --------------------

Basic net income per share is computed
based on the weighted average common shares outstanding in the period. Diluted net income per share is computed based on the weighted average common shares outstanding in the period and the effect of dilutive securities (stock options and awards)
except where the inclusion is anti-dilutive.



|                                           |  |                                       |       |      |                                       |       |      |  |      |       |  |   |      
|------------------------------------------ |  | ------------------------------------- | ----- | ---- | ------------------------------------- | ----- | ---- |  | ---- | ----- |  | - | -----
|                                           |  | Three Months Ended September 30,      |       |      | Nine Months Ended September 30,      
|                                           |  | 2007                                  |       | 2006 |                                       |       | 2007 |  | 2006
|                                           |  | (In thousands, except per share data) |       |      | (In thousands, except per share data)
|NET INCOME (LOSS):                         |  | $                                     | 215   |      | $                                     | (128  | )    |  | $    | 247   |  | $ | 154  
|                                           |  |                                       |       |      |                                       |       |      |  |      |       |  |   |      
|DETERMINATION OF SHARES:                   |  |                                       |       |      |                                       |       |      |  |      |       |  |   |      
|Average common shares outstanding          |  |                                       | 5,642 |      |                                       | 5,627 |      |  |      | 5,641 |  |   | 5,622
|Incremental common shares issuable:        |  |                                       |       |      |                                       |       |      |  |      |       |  |   |      
|Stock Options and awards                   |  |                                       | 34    |      |                                       |      |      |  |      | 91    |  |   | 173  
|                                           |  |                                       |       |      |                                       |       |      |  |      |       |  |   |      
|Diluted average common shares outstanding  |  |                                       | 5,676 |      |                                       | 5,627 |      |  |      | 5,732 |  |   | 5,795
|                                           |  |                                       |       |      |                                       |       |      |  |      |       |  |   |      
|Basic net income (loss) per common share   |  | $                                     | 0.04  |      | $                                     | (0.02 | )    |  | $    | 0.04  |  | $ | 0.03 
|                                           |  |                                       |       |      |                                       |       |      |  |      |       |  |   |      
|Diluted net income (loss) per common share |  | $                                     | 0.04  |      | $                                     | (0.02 | )    |  | $    | 0.04  |  | $ | 0.03 
|                                           |  |                                       |       |      |                                       |       |      |  |      |       |  |   |      



5



---

Stock options outstanding to purchase 146,550 and 19,900 shares of common stock for the three and nine months ended
September 30, 2007, respectively, were excluded from the calculation of diluted shares because their effect would be anti-dilutive.



|(3) | Property and Equipment
|--- | ----------------------

Property and equipment consisted of
the following at the dates indicated:



|                                               |  |              |  |                         |        |   |                         |   |        |  
|---------------------------------------------- |  | ------------ |  | ----------------------- | ------ | - | ----------------------- | - | ------ | -
|                                               |  | Life inyears |  | As of September 30,2007 |        |   | As of December 31, 2006 |  
|                                               |  |              |  | (In thousands)          |       
|Machinery and equipment                        |  | 3-10         |  | $                       | 1,823  |   |                         | $ | 1,357  |  
|Leasehold improvements                         |  | 3-7          |  |                         | 506    |   |                         |   | 326    |  
|Furniture and fixtures                         |  | 3-7          |  |                         | 228    |   |                         |   | 147    |  
|                                               |  |              |  |                         |        |   |                         |   |        |  
|                                               |  |              |  |                         | 2,557  |   |                         |   | 1,830  |  
|Less accumulated depreciation and amortization |  |              |  |                         | (1,264 | ) |                         |   | (1,033 | )
|                                               |  |              |  |                         |        |   |                         |   |        |  
|Total property and equipment, net              |  |              |  | $                       | 1,293  |   |                         | $ | 797    |  
|                                               |  |              |  |                         |        |   |                         |   |        |  

Depreciation and amortization of property and equipment for the nine months ended September 30, 2007 and 2006
was $247,000 and $182,000, respectively.



|(4) | Stock Options and Equity
|--- | ------------------------

During 2003, the Company adopted
the 2002 ADA-ES, Inc. Stock Option Plan, which was originally referred to as the 2002 Stock Option Plan (the 2003 Plan), and reserved 400,000 shares of Common Stock for issuance under the plan. In general, all options granted under the
2003 Plan expire ten years from the date of grant unless otherwise specified by the Companys Board of Directors. The exercise price of options was determined by the compensation committee of the board of directors at the time the option was
granted of not less than 100% of the fair market value of a share of our Common Stock on the date the option is granted. During the first quarter of 2006, 19,900 options were granted under this plan. This plan was replaced by the 2007 Equity
Incentive Plan described below, and as a result, 140,706 shares of Common Stock that were originally reserved for issuance upon exercise of options grantable under the 2003 Plan were removed from the 2003 Plan. As of September 30, 2007 and
2006, 9,550 and 6,557 options were exercisable, respectively.

During 2004, the Company adopted the 2004 Executive Stock Option Plan. This plan authorized
the grant of up to 200,000 options to purchase shares of the Companys Common Stock to executive officers of the Company, all of which were granted in 2004. The option exercise price of $8.60 per share was the market price on the date of the
grant. The options are exercisable over a 10-year period based on a vesting schedule that may be accelerated based on performance of the individual recipients as determined by the Board of Directors. In February 2007, the Board authorized vesting of
17,258 options under this plan with a fair value of $35,000. As of September 30, 2007 and 2006, 49,429 and 39,228 options were exercisable, respectively.

During 2004, the Company adopted a plan (the 2004 Plan) for the issuance of shares and the grant of options to purchase shares of the Companys Common Stock to the Companys non-management directors. The 2004 Plan
provided for the award of stock of 603 shares per individual non-management director or 4,221 shares in total, and the grant of options to purchase 5,000 shares of common stock per individual non-management director, or 35,000 in total, all of which
were formally granted and issued in 2005 after approval of the 2004 Plan by the shareholders. The option exercise price of $13.80 per share for the stock options granted on November 4, 2004 was the market price on the date of the grant. The
options are exercisable over a period of five years and will vest over a three-year period, one-third each year for continued service on the Board. If such service is terminated, the non-vested portion of the option will be forfeited. During the
second quarter of 2007, 4,015 were forfeited after the death of a director. As of September 30, 2007 and 2006, 8,333 and 6,668 options were vested and exercisable, respectively.

During 2005, the Company adopted the 2005 Directors Compensation Plan (the 2005 Plan), which authorized the issuance of shares of Common Stock and the grant of options to purchase shares of the
Companys Common Stock to non-management directors. The 2005 Plan provides a portion of the annual compensation to non-management directors of the Company in the form of awards of shares of Common Stock and vesting of options to purchase Common
Stock of the Company for services performed for the Company. Under the 2005 Plan, the award of stock is limited to not more than 1,000 shares per individual per year, and the grant of options is limited to 5,000 per individual in total. The
aggregate number of shares of Common Stock reserved for issuance under the 2005 Plan totals 90,000 shares (50,000 in the form of stock awards and 40,000 in the form of options). The exercise price for options granted under the 2005 Plan will be the
market price on the date of grant, the shares of Common Stock underlying the option will vest at a rate of no more than 1,667 shares per annual period per individual, and any unvested options that are outstanding at the date the individual is no
longer a Director will be forfeited. The 2005 Plan, if not terminated earlier by the Board, will terminate ten years after the date of its adoption. As of September 30, 2007, 5,000 of the options were vested and exercisable.



6



---

Following is a table of options activity for the nine months ended September 30, 2007:



|                                        |  |                            |   |  |                      |   |  |                                 |      
|--------------------------------------- |  | -------------------------- | - |  | -------------------- | - |  | ------------------------------- | -----
|                                        |  | Director &Employee Options |   |  | Non-Employee Options |   |  | Weighted Average Exercise Price
|OPTIONS OUTSTANDING, January 1, 2007    |  | 344,969                    |   |  | 80,000               |   |  | $                               | 11.55
|Granted                                 |  |                           |   |  |                     |   |  |                                 |     
|Exercised                               |  | (11,396                    | ) |  |                     |   |  |                                 | 10.58
|Expired                                 |  | (4,015                     | ) |  | (21,000              | ) |  |                                 | 14.47
|                                        |  |                            |   |  |                      |   |  |                                 |      
|OPTIONS OUTSTANDING, September 30, 2007 |  | 329,558                    |   |  | 59,000               |   |  | $                               | 11.39
|                                        |  |                            |   |  |                      |   |  |                                 |      
|OPTIONS EXERCISABLE, September 30, 2007 |  | 177,749                    |   |  | 59,000               |   |  | $                               | 12.04
|                                        |  |                            |   |  |                      |   |  |                                 |      

The aggregate intrinsic value of options exercisable at September 30, 2007 was $ 97,000 based on a market
price of $12.45.

Stock options outstanding at September 30, 2007 are summarized in the table below:



|                         |  |                     |  |                                 |       |                   |         |                                          |     |                                 |   |      
|------------------------ |  | ------------------- |  | ------------------------------- | ----- | ----------------- | ------- | ---------------------------------------- | --- | ------------------------------- | - | -----
|                         |  | Options Outstanding |  | Options Exercisable            
|Range of Exercise Prices |  | NumberOutstanding   |  | Weighted Average Exercise Price |       | NumberExercisable |         | WeightedAverageRemainingContractualLives |     | Weighted Average Exercise Price
|$2.80                    |  | 11,665              |  | $                               | 2.80  |                   | 11,665  |                                          | 6.1 |                                 | $ | 2.80 
|$8.60 - $10.00           |  | 230,343             |  | $                               | 8.90  |                   | 113,109 |                                          | 6.7 |                                 | $ | 9.22 
|$13.80 - $15.25          |  | 103,250             |  | $                               | 14.59 |                   | 78,625  |                                          | 6.5 |                                 | $ | 14.49
|$18.61 - $20.20          |  | 43,300              |  | $                               | 19.34 |                   | 33,350  |                                          | 8.1 |                                 | $ | 19.08
|                         |  |                     |  |                                 |       |                   |         |                                          |     |                                 |   |      
|                         |  | 388,558             |  | $                               | 11.39 |                   | 236,749 |                                          | 6.8 |                                 | $ | 12.04
|                         |  |                     |  |                                 |       |                   |         |                                          |     |                                 |   |      

No options were granted in the nine months ended September 30, 2007. The average fair value of each director
and employee option granted in the nine months ended September 30, 2006 was approximately $5.52 and was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:



|                                    |  |     |  
|----------------------------------- |  | --- | -
|Expected volatility                 |  | 55  | %
|Risk-free interest rate             |  | 4.0 | %
|Expected life of options (in years) |  | 4.0 |  
|Expected dividends                  |  |    |  

During 2007, the Company adopted the 2007 Equity Incentive Plan (the 2007 Plan), which replaces the
2003 Plan. The 2007 Plan authorizes the issuance to employees, directors and consultants of up to 600,000 shares of Common Stock, either as restricted stock grants or to underlie options to purchase shares of the Companys Common Stock. Under
the 2007 Plan, the award of stock is limited to not more than 30,000 shares per individual per year with a maximum of 10,000 shares grantable in any year to non-management Directors. In general, all options granted under the 2007 Plan will expire
ten years from the date of grant unless otherwise specified by the Companys Board of Directors. The exercise price for options granted under the 2007 Plan will be the market price on the date of grant and the shares of Common Stock underlying
the option will vest on the passage of specified times following the date of grant, the occurrence of one of more events, the satisfaction of performance criteria or other conditions specified by the Companys Board of Directors. As of
September 30, 2007, no options have been granted under the 2007 Plan.



7



---

On September 26, 2007, the Board of Directors awarded restricted stock under the 2007 Plan. All non-executive
employees and certain officers were entitled to an award of restricted stock under the following conditions (1) employees that had not received stock options upon commencement of employment received a restricted stock award equal based on a
percentage of their starting salaries, (2) employees that had received stock options upon commencement of employment had the option to exchange any remaining stock options outstanding for a restricted stock award based on their starting salary,
and (3) employees with five or more years of service received a restricted stock award based on a percent of their current annual salary. The purchase price for restricted stock was $0.01 per share and the restricted stock vests over a five
year period on an annual basis. The stock based compensation related to the restricted stock awards was determined using the fair value of the Companys stock on the date of grant, which was $12.60. In October 2007, seven employees opted to
exchange 42,700 outstanding options for 3,389 shares of restricted stock. The exchange did not result in any stock option modification costs. Unvested shares of restricted stock are subject to forfeiture upon termination of employment with the
Company. A total of 20,177 shares were granted with 313 shares vesting immediately. The total fair value of the grant was $212,000. For the nine months ended September 30, 2007, the Company recognized $4,000 of compensation expense relate to
the vesting of restricted stock.

A summary of the status of the non-vested shares as of September 30, 2007, is presented below:



|                                 |  |        |   |  |                                     |      
|-------------------------------- |  | ------ | - |  | ----------------------------------- | -----
|Non-vested Shares                |  | Shares |   |  | WeightedAverageGrant DateFair Value
|Non-vested at January 1, 2007    |  |       |   |  | $                                   |     
|Granted                          |  | 20,177 |   |  |                                     | 12.60
|Vested                           |  | (313   | ) |  |                                     | 12.60
|Forfeited                        |  |       |   |  |                                     |     
|                                 |  |        |   |  |                                     |      
|Non-vested at September 30, 2007 |  | 19,864 |   |  | $                                   | 12.60
|                                 |  |        |   |  |                                     |      

As of September 30, 2007, there was $438,000 of total unrecognized cost related to non-vested share-based
compensation arrangements granted under the Companys equity incentive plans. This cost is expected to be recognized over 5.25 years. The total fair value of shares underlying stock options which vested during the nine months ended
September 30, 2007 and 2006 was $209,000 and $215,000, respectively.



|(5) | Capitalized Development Costs
|--- | -----------------------------

We are capitalizing all
direct and identifiable incremental costs associated with our development efforts to build activated carbon facilities. As of September 30, 2007, such costs totaled $6.2 million, and are included in Development Projects and Other Assets on
the accompanying condensed consolidated balance sheets. Such development costs are generally deferred and either (a) expensed when it has been determined they are no longer of future value, or (b) capitalized as part of long-term assets.



|(6) | Commitments and Contingencies
|--- | -----------------------------

Under certain contracts to
supply activated carbon injection systems, the Company may grant performance guarantees to the owner of the power plants that guarantee the performance of the associated equipment for a specified period. The Company may also guarantee the
achievement of a certain level of mercury removal based upon the injection of a specified quantity of a qualified activated carbon at a specified rate given other plant operating conditions. In the event the equipment fails to perform as specified,
the Company is obligated to correct or replace the equipment. In the event the level of mercury removal is not achieved, the Company has a make right obligation within the contract limits. The Company assesses the risks inherent in each
applicable contract and accrues an estimate that is based on costs incurred over the performance period of the contract. In some cases a performance bond may be purchased and held for the period of the warranty that can be used to satisfy the
obligation. No warranty claims have been made to date. Any warranty costs paid out in the future will be charged against the accrual. The adequacy of warranty accrual balances is assessed at least quarterly based on current facts and circumstances
and adjustments are made as needed. As of September 30, 2007 and December 31, 2006, the accrual balances for such equipment warranties and performance guarantees were $232,000 and $120,000, respectively, and are included in deferred
warranty and other liabilities in the accompanying balance sheets.

At September 30, 2007, the Company had a standby letter of credit for $40,000
related to a proposal for an ACI System. This commitment was not recorded on the Companys consolidated balance sheet as the Company does not expect the funds to be called upon under the letter of credit.



8



---

|(7) | Business Segment Information
|--- | ----------------------------

The following information
relates to the Companys two reportable segments: Mercury emission control (MEC) and Flue gas conditioning and other (FGC). All assets are located in the U.S. and are not evaluated by management on a segment basis. All significant customers are
U.S. companies.



|                |  |                                  |       |      |                                 |       |      |  |      |        |  |   |       
|--------------- |  | -------------------------------- | ----- | ---- | ------------------------------- | ----- | ---- |  | ---- | ------ |  | - | ------
|                |  | Three Months Ended September 30, |       |      | Nine Months Ended September 30,
|                |  | 2007                             |       | 2006 |                                 |       | 2007 |  | 2006
|                |  | (In thousands)                   |       |      | (In thousands)                 
|REVENUE:        |  |                                  |       |      |                                 |       |      |  |      |        |  |   |       
|MEC             |  | $                                | 5,144 |      | $                               | 4,120 |      |  | $    | 13,382 |  | $ | 9,875 
|FGC             |  |                                  | 457   |      |                                 | 328   |      |  |      | 1,065  |  |   | 1,528 
|                |  |                                  |       |      |                                 |       |      |  |      |        |  |   |       
|Total           |  | $                                | 5,601 |      | $                               | 4,448 |      |  | $    | 14,447 |  | $ | 11,403
|                |  |                                  |       |      |                                 |       |      |  |      |        |  |   |       
|SEGMENT PROFIT: |  |                                  |       |      |                                 |       |      |  |      |        |  |   |       
|MEC             |  | $                                | 1,207 |      | $                               | 889   |      |  | $    | 3,106  |  | $ | 2,094 
|FGC             |  |                                  | 397   |      |                                 | (93   | )    |  |      | 307    |  |   | 287   
|                |  |                                  |       |      |                                 |       |      |  |      |        |  |   |       
|Total           |  | $                                | 1,604 |      | $                               | 796   |      |  | $    | 3,413  |  | $ | 2,381 
|                |  |                                  |       |      |                                 |       |      |  |      |        |  |   |       

A reconciliation of the reported total segment profit to net income for the periods shown above is as follows:



|                                                                   |  |                                  |        |   |                                 |   |      |      |  |   |        |   |  |   |        |  
|------------------------------------------------------------------ |  | -------------------------------- | ------ | - | ------------------------------- | - | ---- | ---- |  | - | ------ | - |  | - | ------ | -
|                                                                   |  | Three Months Ended September 30, |        |   | Nine Months Ended September 30, |  
|                                                                   |  | 2007                             |        |   | 2006                            |   |      | 2007 |  |   | 2006   |  
|                                                                   |  | (In thousands)                   |        |   | (In thousands)                  |  
|Total segment profit                                               |  | $                                | 1,604  |   |                                 | $ | 796  |      |  | $ | 3,413  |   |  | $ | 2,381  |  
|Non-allocated general and administrative expenses                  |  |                                  | (1,474 | ) |                                 |   | (788 | )    |  |   | (3,702 | ) |  |   | (2,227 | )
|Depreciation and amortization                                      |  |                                  | (96    | ) |                                 |   | (71  | )    |  |   | (263   | ) |  |   | (193   | )
|Interest, other income (expense) and deferred income tax provision |  |                                  | 181    |   |                                 |   | (65  | )    |  |   | 799    |   |  |   | 193    |  
|                                                                   |  |                                  |        |   |                                 |   |      |      |  |   |        |   |  |   |        |  
|Net income (loss)                                                  |  | $                                | 215    |   |                                 | $ | (128 | )    |  | $ | 247    |   |  | $ | 154    |  
|                                                                   |  |                                  |        |   |                                 |   |      |      |  |   |        |   |  |   |        |  

Non-allocated general and administrative expenses include costs that benefit the business as a whole and are not
directly related to one of our segments. Such costs include but are not limited to accounting and human resources staff, information systems costs, facility costs, legal and audit fees and corporate governance expenses.



|(8) | Recently Issued Accounting Pronouncements
|--- | -----------------------------------------

In June 2006, the
FASB issued FIN 48, Accounting for Uncertainty in Income Taxes - An Interpretation of FASB Statement No. 109 (FIN 48) This interpretation was issued to clarify the accounting for uncertainty in income taxes recognized in the
financial statements by prescribing a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. FIN 48 requires the recognition of
penalties and interest on any unrecognized tax benefits. Our policy is to reflect penalties and interest related to FIN 48 issues as part of income tax expense as they become applicable. We adopted the provisions of FIN 48 on January 1,
2007. No unrecognized tax benefits were recorded as of the date of adoption. The Company files income tax returns in the U.S. federal and various state jurisdictions. We are no longer subject to U.S. federal and state and local
examinations by tax authorities for years before 2004.

In September 2006, the FASB issued SFAS No. 157, Fair Value Measurement (SFAS 157),
which defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. SFAS 157 focuses on creating consistency and comparability in fair value measurements. SFAS 157 is effective for fiscal
years beginning after November 15, 2007, and interim periods within those fiscal years. We are evaluating its impact and do not expect that adoption of SFAS 157 will have a material impact on our financial statements.

In February 2007, the FASB issued SFAS No. 159, The Fair Value Option for Financial Assets and Financial Liabilities. SFAS 159 permits entities to
choose to measure many financial instruments and certain other items at fair value. The provisions of SFAS 159 will be effective beginning January 1, 2008. We are in the process of determining the effect, if any, the adoption of SFAS
159 will have on our financial statements.



9



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|Item 2. | Managements Discussion and Analysis of Financial Condition and Results of Operations.
|------- | --------------------------------------------------------------------------------------

This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, regarding future events and our anticipated future results, which are based
on current expectations, estimates, forecasts, and projections about the industries in which we operate and the beliefs and assumptions of our management. Actual results may vary materially from such expectations. The following discussion and
analysis of our financial condition and results of operations should be read in conjunction with the audited consolidated financial statements and related notes thereto included in our Annual Report on Form 10-K for the year ended December 31,
2006. Words or phrases such as will, hope, expect, anticipate, intend, plan, the negative expressions of such words, or similar expressions generally identify the
forward-looking statements in this Report, and such forward-looking statements include, but are not limited to, statements or expectations regarding (a) the impact of national and state mercury control regulations on the nations
1,100-plus coal-fired units, (b) capability of U.S. coal reserves to serve demand for the next 250 years, (c) future estimated costs to control mercury emissions, (d) the rapid development of the mercury emission control market,
(e) amounts and timing of and changes in future revenues, research and development expenses, (f) costs of operating Clean Coal Solutions, LLC, (Clean Coal), (g) annual lease costs and other expenditures and gross margins, (h) our
ability to meet contract delivery milestones, (i) the market and market potential (size) for Refined Coal and ADA-249M, (j) timing of completion of projects and future demonstrations, (k) our ability to qualify our Refined Coal
products for Section 45 Tax Credits under applicable tax laws, (l) expected future bid requests and procession of outstanding bid requests for orders between now and 2010, (m) the range of costs for capital equipment expected to be
required by each coal-fired unit and the range of sorbent requirements per unit, (n) the inability of the supply of activated carbon to meet market demand as early as 2010, (o) potential costs for development of a Greenfield activated
carbon facility, (p) appropriation of funds by Congress for DOE projects, (q) immateriality of any future adjustments due to DOE audits, (r) our ability to meet a significant portion of the expected shortage in activated carbon
supply, (s) the ability to obtain adequate sources of activated carbon in the short term, and (t) pricing and margins on ACI systems.

The
forward-looking statements contained in this Report involve risks and uncertainties that could cause actual results to differ materially from the anticipated results we discuss in this Report. Although forward-looking statements provide
additional information about us, investors should keep in mind that forward-looking statements are only predictions, at a point in time, and are inherently less reliable than historical information. We do not guarantee future results, levels of
activity, performance or achievements and we do not assume responsibility for the accuracy and completeness of these statements. You are cautioned not to place undue reliance on the forward-looking statements made in this Quarterly Report, and
to consult any later filings we may make with the Securities and Exchange Commission for additional risks and uncertainties that may apply to our business and the ownership of our securities. The forward-looking statements contained in this
Quarterly Report on Form 10-Q are made and based on information as of the date of this report. We assume no obligation to update any of these statements based on information after the date of this report. The principal risks and uncertainties
that may affect our actual performance and results of operations include the following: changes in existing and planned environmental laws, changes in government funding, loss of key relationships, technical problems with activated carbon injection
(ACI) systems sold, failure to meet guarantees on ACI systems, decrease in demand for coal, lack of management expertise, inability to obtain funding and other risks relating to the development of a Greenfield activated carbon facility, including
the ability to obtain governmental permits needed to construct the facilities and appropriate partners to participate in the development of the facilities, seasonality of our business, inadequate supply of activated carbon, inadequate supply of
coal, lack of or mismanagement of resources to support future growth, loss of key personnel, changes in taxation rules or financial accounting standards, the market for ADA-ES common stock or other securities, dilution, if any, resulting from future
sales of common stock or other securities, and lack of dividend payments to shareholders. These risks and uncertainties may cause our actual results to differ materially from those predicted or described in the forward-looking statements.

Overview

We provide environmental technologies and
specialty chemicals to the coal-burning electric utility industry. Revenues are generated through (1) time and materials and fixed-price contracts for the emerging mercury emission control (MEC) market, several of which are co-funded by
government (Department of Energy - DOE) and industry and (2) the sale of specialty chemicals and services for flue gas conditioning (FGC) and other applications.

Mercury has been identified as a toxic substance and, pursuant to a court order, the EPA issued regulations for its control in March 2005. We believe that the long-term growth of the MEC market for the electric
utility industry will most likely depend on how industry chooses to respond to federal and state regulations, which are in various stages of enactment and challenge in the courts. As many as 1,100 existing coal-fired boilers may be affected by such
regulations, if and when they are fully implemented. DOEs latest report issued in October 2007 includes 121 potential new projects totaling 72GW of capacity. Permitting of new coal-fired plants generally requires them to meet more stringent
requirements that likely include MEC. For the near-term, our revenues from this market will be dependent on (i) DOE- and industry-funded contracts mentioned above, (ii) mercury testing services and (iii) equipment sales to new plants
and existing plants affected by the implementation of enacted regulations. State regulations and increasing numbers of consent decrees are becoming the largest market driver for this part of our business. Although we expect this market to show
steady growth over the next several years, we believe the most significant revenue growth will occur when final federal regulations impact a significant portion of previously uncontrolled, existing boilers.



10



---

The market for our FGC chemicals and services is relatively flat and is expected to continue to decline in the near-term.
Margins on these products are typically higher than what we recognize for our present MEC sales and represent an important, but decreasing, contribution to our overall profitability. Within the FGC segment, costs related to our investments in Clean
Coal and development projects have reduced profits from chemical sales and related services.

Thus far in 2007, we have signed contracts or received orders
to proceed for 15 ACI systems to be delivered in 2007 and 2008, bringing our total number of ACI systems installed or currently in process to 27. In addition, one system was installed in partnership with a third party for which we provided design
services through a DOE contract. During the nine months ended September 30, 2007 we recognized approximately $6.7 million in revenue related to ACI system sales. Unrecognized remaining revenues from ACI contracts totaled approximately $12.0
million as of September 30, 2007 and are expected to be recognized from 2007 through 2009. Completion of an ACI contract usually occurs from 9 to 12 months after the award, but may take as long as 2-years for installations at new power plants.
We expect the supply of ACI systems to be our dominant revenue source for 2007 and 2008 and expect to bid on between 50 and 100 ACI systems during this time period based upon current regulations.

In March 2007, we signed an agreement with Calgon Carbon Corporation (CCC) to jointly market activated carbon to the utility market and explore ways in which we could
both cooperate in expanding capacity at CCCs facilities and our plans to build a new production facility. In July 2007, CCC gave us notice of its intent not to precede with any joint development plans and terminate the agreement, which was
effective in August 2007. We intend, and we have been advised that CCC intends, to honor commitments made to one another for certain joint activities and on bids for supply contracts made to third parties during the term of the agreement. We expect
the impact of the termination to result in reduced commissions in 2009 of possibly $3 million. We are evaluating several alternatives to supply activated carbon to the market prior to the commencement of production from a Greenfield
activated carbon facility discussed further below.

Results of Operations  3rd Quarter and YTD 2007 versus 3rd Quarter and YTD 2006

Revenues totaled $5.6 million and $14.4 million for the three and nine months ended September 30, 2007, respectively versus $4.4 million and $11.4
million for the same periods in 2006, respectively, representing increases of 27% and 26% for the quarter and year to date. Revenues in our MEC segment for 2007 increased in the third quarter and first nine months by $1.0 million and $3.5 million,
respectively (25% and 36%), and FGC and other activities increased by $129,000 and decreased ($463,000), respectively (39% and 30%) from the same periods in 2006.

Revenues in the first nine months of 2007 from the MEC segment were comprised of government and industry-supported contracts (41%), sales and installation of ACI systems and a minor amount of commissions on activated carbon (AC) sales
(51%) and consulting services (8%), compared to 47%, 42% and 11%, respectively, in the comparable 2006 period. DOE and industry demonstration contract revenue increased by $145,000 and $927,000 or 8% and 20% for the three and nine months ended
September 30, 2007, respectively, from the same periods in 2006, as a result of 2006 planned activities being executed in 2007 for two of our DOE contracts. The remaining unearned amounts on these contracts were $6.5 million as of
September 30, 2007, of which $1.7 million is expected to be recognized in 2007 (including cash contributions by other industry partners), which amounts are net of the reductions noted below. Our contracts with the government are subject to
audit by the federal government, which could result in adjustment(s) to previously recognized revenue. We believe, however, that we have complied with all requirements of the contracts and future adjustments, if any, will not be material. In
addition, the federal government must appropriate funds on an annual basis to support DOE contracts, and funding is always subject to unknown and uncontrollable contingencies. In June 2007, we were informed by DOE that funding for a project would be
lower than expected in 2007. The reduction in funding for this project was approximately $800,000, including related industry cost share reductions. In July 2007, we were informed by DOE that their budget allocation for their fiscal year 2007 was
lower than expected, which will result in a reduction in funding for another of our contracts in the amount of $330,000. When combined with the industry cost share for this project, we are anticipating a total reduction of approximately $430,000,
all related to activities planned in 2007. While we are not aware of any further DOE plans to reduce funding on projects currently under contract, we expect DOE funding for mercury control projects in the future to decline as the mercury control
market matures. However, we expect funding from utilities for mercury control for evaluation and testing to increase to meet state and local regulations and that DOE may fund other projects related to our business, including carbon dioxide control.
Revenues from commercial consulting services for the nine months ended September 30, 2007 included in the MEC segment decreased approximately $24,000 from 2006 to 2007.



11



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ACI systems revenue increased by $800,000 and $2.6 million or 46% and 62% for the three and nine months ended
September 30, 2007, respectively, from the same periods in 2006 primarily as a result of increased number of system sales, as noted above. We expect growth in 2007 in the MEC segment to result primarily from an increasing number of ACI system
sales in response to mercury emission control legislation and from existing government and industry-supported contracts.

FGC and other revenues for the
quarter increased by $129,000 or 39% as compared to the same period in 2006, due to the completion of a successful demonstration project at another plant in the third quarter of 2007. For the nine months ended September 30, 2007 FGC and other
revenues decreased by $463,000 or 30% due to fewer shipments of chemical to continuing customers. We expect FGC and other revenues in 2007 to be significantly lower than 2006, as we believe planned customer purchases for 2007 will be less than such
purchases made in 2006.

Cost of revenues increased by $572,000 and $2.1 million or 18% and 27% for the three and nine months ended September 30,
2007, respectively, from the same periods in 2006 primarily as a result of increased expenses to support increasing revenues. Gross margins were 33% for both the third quarter and nine months ended September 30, 2007 as compared to 29% and 33%
for the same periods in 2006. The increase for the quarter is a result of increased margins in the both MEC and FGC and other segments as discussed below.

Cost of revenues for the MEC segment increased by $686,000 and $2.4 million for the quarter and nine months ended September 30, 2007, respectively, or 24% and 37%, as compared to the same periods in 2006 primarily as a result of the
increased revenue generating activities noted above. Gross margins for this segment were 32% and 33% for the quarter and nine months, respectively, as compared to 31% and 33% for 2006. The increase in the gross margin for the current quarter is the
result of higher margins on government and industry-supported contracts, net of the decrease in gross margins for the quarter from lower margins on ACI system sales as that market is developing and increasing pricing pressures as a result of
competition. MEC segment profits as a percent of revenue were 22% and 21% for the third quarter and nine months ended September 30, 2007, respectively, as compared to 20% and 18% for the same periods in 2006. During 2007, we more than doubled
the number of engineers in our commercial equipment group, who are integral to our MEC operations. We expect that adequate resources of skilled labor will continue to be available to meet anticipated needs.

Cost of revenues for the FGC and other segment decreased by $114,000 and $363,000 or 35% and 36% for the quarter
and nine months ended September 30, 2007, respectively, as compared to the same periods in 2006. We performed a demonstration in the 1stand 2ndquarters of 2006 that was not repeated in 2007 that contributed to higher costs for those periods. Gross margins for this segment were 54% and 40% for the
quarter and nine months ended September 30, 2007, respectively as compared to 2% and 34% for the same periods in 2006. The increase in gross margins from 2006 to 2007 is due to additional revenue from a demonstration in the third quarter of
2007 and lower developmental project costs than the prior periods. In a portion of our FGC sales, we use ARKAY Technologies under a license agreement, which carry a lower margin than historical FGC sales. FGC revenues include chemical sales, which
carry a higher margin than the typical fixed price and time and materials sales in MEC revenues.

We expect the amount of fixed price and
time and materials work and ACI system sales in the MEC segment for the near term to represent an increasing source of revenue. Overall gross margins for the 2007 year are therefore expected to decline somewhat from the levels achieved for 2006 as a
result of an increasing proportion of fixed price and time and materials work, our assumption of an increasing share of costs in the field demonstration projects in which we have elected to participate and pricing pressure caused by increased
competition.

General and administrative expenses increased by $445,000 or 46% to $1.4 million for the quarter and $1.3 million or 49% for the nine months
ended September 30, 2007. The dollar increase in the nine months ended September 30, 2007 resulted primarily from increased audit and Sarbanes-Oxley (SOx) compliance costs ($141,000); increased legal costs ($115,000), increased
administrative wage costs ($208,000); and increased consulting costs ($238,000). We expect our audit and SOx costs to decrease in future periods.

Research
and development expenses increased by $14,000 and $79,000 or 5% and 9% for the quarter and nine months ended September 30, 2007, respectively, as compared to the same periods in 2006. We incur R&D expenses not only on direct activities we
conduct but also by sharing a portion of the costs in the government and industry programs in which we participate. Future consolidated research and development expenses, except for those anticipated to be funded by the DOE contracts and others that
may be awarded are expected to continue to grow on an annual basis for the next several years. Of the amount incurred in 2007, $135,000 was directly related to DOE contracts.



12



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MEC segment profits increased by $318,000 and $1.0 million or 36% and 48% for the quarter and nine months ended
September 30, 2007, respectively, as compared to the same periods in 2006. The increase was primarily a result of increased MEC segment revenues. FGC and other segment profits increased by $490,000 and $20,000 or 527% and 7% for the quarter and
nine months ended September 30, 2007, compared to the same periods in 2006. The increase for the quarter was primarily the result of a successful demonstration conducted in July 2007.

Included in other income and expense is our minority interest in the loss in Clean Coal, our joint venture with an affiliate of NexGen Resources Corporation that is
pursuing refined coal opportunities. The minority interest in the loss amounted to $129,000. During the nine months ended September 30, 2007, we incurred approximately $292,000 related to these efforts and the support of our internal costs. We
expect a similar level of costs to continue for the balance of 2007. Thus far in 2007, we have conducted three full-scale tests of our product, which demonstrated the ability to meet the emission control performance required to qualify for the
Section 45 tax credits. In the event the United States Internal Revenue Service deems our process to qualify for the Section 45 tax credits, NexGen has the right to maintain its 50% interest by paying us an additional $4 million, in 8
quarterly payments of $500,000 each, beginning in the quarter the JV receives qualification. We expect to receive indication that our process qualifies for the Section 45 tax credits in 2008. NexGen is not obligated to make those payments, but
it if does not do so, it will forfeit a part of its interest in Clean Coal in direct proportion to the amount of the $4 million that it elects not to pay.

In the third quarter of 2006 we recognized $412,000 of deferred costs related to 2006 merger and acquisition activities. We had net interest and other income of $215,000 and $750,000 for the quarter and nine months ended September 30,
2007, respectfully, as compared to $270,000 and $658,000 for the same periods in 2006. Interest and other income increased in the nine months ended September 30, 2007 due to an increase in invested balances and increasing interest rates.

The deferred income tax provision for the nine months ended September 30, 2007 represents our expected effective tax rate of approximately 24% for
2007, which is less than the rate of 26% we recognized for the nine months ended September 30, 2006. The decrease is primarily the result of larger impact of R&D tax credits for nine months ended September 30, 2007 as compared to the
amount estimated for the nine months ended September 30, 2006.

Unrealized gains, net of tax, on investments in debt and equity securities amounted to
$44,000 and $43,000 for the quarter and nine months ended September 30, 2007, respectively, as compared to $101,000 and $87,000 for the same periods in 2006. The gains recorded in 2007 and 2006 are primarily the result of an increase in the
market value of our debt securities and equity investments.

Liquidity and Capital Resources

We had positive working capital of $16.0 million at September 30, 2007, compared to working capital of $18.5 million at December 31, 2006. The decrease resulted
primarily from our continued investments in our development projects, capital expenditures, and fluctuations in operating assets and liabilities in the normal course of business. In addition to working capital, we had long-term investments in
securities, accounted for as available-for-sale investments, of approximately $2.8 million and $5.3 million at September 30, 2007 and December 31, 2006, respectively. We intend to liquidate a portion of these investments to
fund our development efforts to build an activated carbon facility. We may also use a portion of such investments and cash on hand to fund growth of the Company, which may include expansion of product offerings and strategic acquisitions. We believe
that existing and expected future working capital will be sufficient to meet our anticipated operating needs in 2007.

Our principal source of liquidity is
our existing working capital and operating cash flow. Future positive cash flow is somewhat dependent upon the continuation of chemical sales and operations of the flue gas conditioning (FGC) units currently in-place in Illinois and Iowa. These
units provided an average monthly cash flow of approximately $25,000 each thus far in 2007. We performed a successful demonstration project at another plant in the third quarter of 2007, following which the customer expressed interest in purchasing
a permanent piece of equipment. We are not certain that this demonstration will result in future sales of FGC equipment and chemicals. Unsatisfactory results for any of our FGC customers, which could be caused by a single factor (or some combination
of factors) such as changes in coal, mechanical difficulties (whether in the FGC unit or otherwise), and/or overall cost/benefit analysis, at any of those units, are likely to result in a decrease or termination of the sale of chemicals for such
units and a reduction in the cash flow we have historically received, thereby reducing that portion of our liquidity that has been provided by positive cash flow from the FGC and other segment.



13



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In June 2007, we were informed by DOE that funding for a project would be lower than expected in 2007. The reduction in
funding for this project is expected to be approximately $800,000, including related industry cost share reductions. In July 2007, we were informed by DOE that their budget allocation for their fiscal year 2007 was lower than expected, resulting in
a reduction in funding for another contract in the amount of $330,000. When combined with the industry cost share for this project, we are anticipating a total reduction of approximately $450,000, all related to activities planned in 2007. In
response to this information, we have limited the planned long-term testing in this project. Assuming no other changes in government funding, we expect to recognize over the next 2.25 years the remaining revenue on in-progress contracts totaling
$6.5 million as of September 30, 2007. We recognized $5.5 million related to DOE and industry co-funded contracts in the nine months ended September 30, 2007. We expect to recognize revenue from these contracts of approximately $7.2
million in total for 2007, including the first nine months. If further funding were not approved, we would decrease or cease activities on those contracts and would expect to maintain a positive cash flow from these contracts it would be at a
reduced level.

We have completed our office expansion as of September 2007. The total cost of this expansion was approximately $235,000, which includes
leasehold improvements and office equipment to accommodate new employees. We funded this out of our existing working capital and cash flow from operations. This amount does not include amounts we may choose to spend on specific development projects
to secure our position in the activated carbon market.

In July 2007, we announced that the Board of Directors has committed the resources it believes will
be needed to complete the design, major equipment procurement, and secure the financing that will be needed for the construction of our first activated carbon (AC) manufacturing facility. Previously the Board committed approximately $4 million from
internal funds for further development, which was expended through August 2007. In August and September, an application for an air permit was delivered to the Louisiana Department of Environmental Quality and the North Dakota Department of Health,
respectively. As currently framed, we are targeting the grant of construction permits and the financial close for the project to occur in March 2008. All-in financing for the first production line is estimated at approximately $260 million. We
anticipate debt project financing of 60% of that amount to be supported by planned out-take contracts. We anticipate meeting the remaining equity required to complete the project through a combination of equity from a strategic partner and through
the sale of our Common Stock in the market. We have obtained shareholder approval to issue up to 3 million shares of our Common stock to fund this project. We subsequently registered a total of 3 million shares of Common Stock with the
United States Securities and Exchange Commission, to be sold on terms to be determined at the time of issuance. We believe these actions will allow us to move the project forward in a manner that will position us to meet a significant portion of the
anticipated shortage in activated carbon for this rapidly expanding market.

During the nine months ended September 30, 2007, we incurred an
additional $5.4 million for development costs on the AC facility, which costs have been deferred and are classified on the balance sheet and included with Development Projects and Other Assets. Such development costs are generally deferred and
either (a) expensed when it has been determined they are no longer of future value, or (b) capitalized as part of long-term assets and then subject to future depreciation expense and impairment evaluations.

Under our defined contribution and 401(k) pension plan, we match up to 5% of salary amounts deferred by employees in the Plan and contribute certain amounts based on the
profits of the Company, which amounts are determined annually by our Board of Directors. During the nine months ended September 30, 2007 and 2006, we recognized $121,000 and $81,000, respectively, of matching expense; this expense is expected
to amount to approximately $175,000 in 2007. In the past, we have also made discretionary contributions to the Plan and employees. Based on results for 2006, the amount paid to the plan totaled $123,000 and was paid in the form of cash to the
accounts of all eligible employees in February and March 2007. During the first nine months ended September 30, 2007 and 2006, we accrued approximately $69,000 and $102,000, respectively, for such payments.

We have recorded net deferred tax liabilities of $131,000 and $133,000 as of September 30, 2007, and December 31, 2006, respectively.

Cash flow provided by operations totaled $1.2 million for the nine months ended September 30, 2007 compared to $1.7 million for the same period in 2006. The 2007
cash flow was due to net income as a result of increased ACI system sales plus increases in our accounts payable ($1.7) million related to increased volume and expenditures for our development project, increases in accrued expenses ($836,000),
adjustments for non-cash expenses, which included expenses paid with stock and stock options ($274,000) and depreciation and amortization ($263,000). The 2007 operating cash flow was offset by the increase in accounts receivable, net, of $2.2
million, which corresponds to our overall growth in business, and in particular with increasing ACI system sales, a decrease in prepaid expenses and other assets of $69,000 and the minority interest in the loss of Clean Coal of $129,000.



14



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Net cash used by investing activities was ($3.2) million for the nine months ended September 30, 2007 compared to
($144,000) for the same period in 2006. In 2007, certificates of deposit totaling $400,000 were liquidated and held as cash equivalents, causing proceeds from sales of securities to exceed investments in securities. Such excess was offset by changes
to our investment portfolio to maintain a targeted balance and maximize earnings, as well as re-investment of gains that occurred during the period. The net increase in cash from investment activity was offset by a use of cash for purchases of
property and equipment for the build-out of additional space in our current headquarters location to accommodate new employees and office equipment ($235,000), and amounts invested in our project development costs ($5.4) million, particularly for
development of a long-term activated carbon supply.

Critical Accounting Policies and Estimates

Revenue Recognition  ADA follows the percentage of completion method of accounting for all significant contracts excluding government contracts and chemical sales.
The percentage of completion method of reporting income takes into account the percent of work completed and overall revenue for contracts in progress. We recognize revenue on government contracts based on the time and expenses incurred to date.

Capitalization of Development Costs - We are capitalizing all direct and identifiable incremental costs associated with our development efforts to build
an activated carbon facility. Such development costs are generally deferred and either (a) expensed when it has been determined they are no longer of future value, or (b) capitalized as part of long-term assets and then subject to
future depreciation expense and impairment evaluations.

Significant estimates are used in preparation of our financial statements and include (1) our
allowance for doubtful accounts, which is based on historical experience; (2) our valuation and classification of investments as available-for-sale securities, which is based on estimated fair market value; and (3) our
percentage of completion method of accounting for significant long-term contracts, which is based on estimates of gross margins and of the costs to complete such contracts. In addition, amounts invoiced for government contracts are subject to change
based on the results of future audits by the federal government. We have not experienced significant adjustments in the past, and we do not expect significant adjustments will be required in the future. We also use our judgment to support the
current fair value of goodwill and other intangible assets of $2.3 million on the consolidated balance sheets. Management believes the fair value of other recorded intangibles is not impaired, although market demand for our products and services
could change in the future, which would require a write-down in recorded values. As with all estimates, the amounts described above are subject to change as additional information becomes available, although we are not aware of anything that would
cause us to believe that any material changes will be required in the near term.

Recently Issued Accounting Policies

In June 2006, the FASB issued FIN 48, Accounting for Uncertainty in Income Taxes - An Interpretation of FASB Statement No. 109 (FIN 48). This
interpretation was issued to clarify the accounting for uncertainty in income taxes recognized in the financial statements by prescribing a recognition threshold and measurement attribute for the financial statement recognition and measurement of a
tax position taken or expected to be taken in a tax return. FIN 48 requires the recognition of penalties and interest on any unrecognized tax benefits. Our policy is to reflect penalties and interest related to FIN 48 issues as part of income tax
expense as they become applicable. We adopted the provisions of FIN 48 on January 1, 2007. No unrecognized tax benefits were recorded as of the date of adoption. The Company files income tax returns in the U.S. federal and various
state jurisdictions. We are no longer subject to U.S. federal and state and local examinations by tax authorities for years before 2004.

In September 2006,
the FASB issued SFAS No. 157, Fair Value Measurement (SFAS 157), which defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. SFAS 157 focuses on creating
consistency and comparability in fair value measurements. SFAS 157 is effective for fiscal years beginning after November 15, 2007, and interim periods within those fiscal years. We are evaluating its impact and do not expect that adoption of
SFAS 157 will have a material impact on our financial statements.

In February 2007, the FASB issued SFAS No. 159, The Fair Value Option for
Financial Assets and Financial Liabilities. SFAS 159 permits entities to choose to measure many financial instruments and certain other items at fair value. The provisions of SFAS 159 will be effective beginning January 1,
2008. We are in the process of determining the effect, if any, the adoption of SFAS 159 will have on our financial statements.



15



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|Item 4. | Controls and Procedures.
|------- | ------------------------

Evaluation of Disclosure
Controls and Procedures

Our management evaluated, with the participation and under the supervision of our Chief Executive Officer and Chief Financial
Officer, the effectiveness of our disclosure controls and procedures as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on this evaluation, our Chief Executive Officer and our Chief Financial Officer concluded that our
disclosure controls and procedures are effective to ensure that information we are required to disclose in reports that we file or submit under the Securities Exchange Act of 1934 is accumulated and communicated to our management, including our
Chief Executive Officer and our Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure and that such information is recorded, processed, summarized and reported within the time periods specified in Securities
and Exchange Commission rules and forms.

Changes in Internal Control Over Financial Reporting

Management concluded as of December 31, 2006 in our Annual Report on Form 10-K, for the year then ended (2006 Annual Report), that our internal control over
financial reporting was not effective. You should refer to managements discussion under Item 9AControls and Procedures in our 2006 Annual Report for a complete description of the criteria applied by management and the factors
upon which management concluded that our internal control over financial reporting was not then effective.

In our 2006 Annual Report, management
identified three material weaknesses in our internal control over financial reporting. During the nine months ended September 30, 2007, we implemented a variety of changes to our internal control over financial reporting intended to remediate
these material weaknesses.

Following is a summary description of the changes in our internal control over financial reporting implemented during the nine
months ended September 30, 2007:



| | 1. | We did not have a sufficient complement of personnel with appropriate training and experience in generally accepted accounting principles (GAAP), or adequate controls
over the resolution of GAAP accounting issues. During the nine months ended September 30, 2007:
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | We have invested time and resources to enhance the knowledge and skills of existing staff.
| | - |  | ------------------------------------------------------------------------------------------



| |  |  | We engaged in a search for a Controller, and on August 6, 2007, we appointed our former Director of Financial Planning and Internal Control as our new
Controller.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------

We believe that, as of the date of this filing, we have remediated the material weakness in our internal control with
respect to sufficient personnel trained and experienced in generally accepted accounting principles described above.



| | 2. | The Companys controls over the collection and recording of accounts payable did not operate effectively. During the nine months ended September 30, 2007:
| | -- | ----------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | We systemized the collection and recordkeeping of invoices.
| | - |  | -----------------------------------------------------------



| |  |  | We implemented procedures to ensure that our financial closings are performed in accordance with a scheduled checklist and in accordance with our financial
controls.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------

Based on the testing of our internal controls over accounts payable in the third quarter ended September 30, 2007, we
have determined that this material weakness is still in remediation.



| | 3. | The Company did not maintain adequate controls over the reconciliation of accounts receivable and deferred revenue. During the nine months ended September 30, 2007:
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | We revised our chart of accounts to ensure proper balance sheet classifications of accounts receivable and deferred revenue.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------



| |  |  | We established monthly revenue and expense review meetings with business process owners.
| | - |  | ----------------------------------------------------------------------------------------

Based on the testing of our internal controls over the accounts receivable and deferred revenue in the third quarter ended September 30, 2007, we have determined
that this material weakness is still in remediation.

The above disclosed previously identified material weaknesses did not result in adjustments to our
consolidated financial statements for the quarter ended September 30, 2007; however, it is reasonably possible that, if not remediated, one or more of the previously identified material weaknesses could result in a material misstatement in our
reported financial statements that might result in a material misstatement in a future annual or interim period.

The changes noted above are the only
changes during our most recently completed fiscal quarter that have materially affected or are reasonably likely to materially affect, our internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act.



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Inherent Limitations on the Effectiveness of Controls

Management does not expect that our disclosure controls and procedures or our internal control over financial reporting will prevent or detect all errors and all fraud. A control system, no matter how well conceived
and operated, can provide only reasonable, not absolute, assurance that the objectives of the control systems are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls
must be considered relative to their costs. Because of the inherent limitations in a cost-effective control system, no evaluation of internal control over financial reporting can provide absolute assurance that misstatements due to error or fraud
will not occur or that all control issues and instances of fraud, if any, have been or will be detected.

These inherent limitations include the realities
that judgments in decision-making can be faulty and that breakdowns can occur because of a simple error or mistake. Controls can also be circumvented by the individual acts of some persons, by collusion of two or more people, or by management
override of the controls. The design of any system of controls is based in part on certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all
potential future conditions. Projections of any evaluation of controls effectiveness to future periods are subject to risks. Over time, controls may become inadequate because of changes in conditions or deterioration in the degree of compliance with
policies or procedures.



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PART II. OTHER INFORMATION



|Item 6. | Exhibits
|------- | --------



|      |  |                                                                                                                                                                 
|----- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------
|31.1* |  | Certification of Chief Executive Officer of ADA-ES, Inc. Pursuant to 17 CFR 240.13a-14(a) or 17 CFR 240.15d-14(a)                                               
|      | 
|31.2* |  | Certification of Chief Financial Officer of ADA-ES, Inc. Pursuant to 17 CFR 240.13a-14(a) or 17 CFR 240.15d-14(a)                                               
|      | 
|32.1* |  | Certification of Chief Executive Officer of ADA-ES, Inc. Pursuant to 18 U.S.C Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
|      | 
|32.2* |  | Certification of Chief Financial Officer of ADA-ES, Inc. Pursuant to 18 U.S.C Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002



|* | These certifications are furnished and shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.
|- | -------------------------------------------------------------------------------------------------------------------------------------------------



18



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SIGNATURES

In accordance with the requirements of the Securities Exchange Act of 1934, the Registrant caused this report to be signed on its behalf by the undersigned thereunto duly authorized.



|                       |  |  |  |                                      
|---------------------- |  |  |  | -------------------------------------
|                       |  |  |  | ADA-ES, Inc.                         
|                       |  |  |  | Registrant                           
|                       |  | 
|Date: November 7, 2007 |  |  |  | /s/ Michael D. Durham                
|                       |  |  |  | Michael D. Durham                    
|                       |  |  |  | President and Chief Executive Officer
|                       |  | 
|Date: November 7, 2007 |  |  |  | /s/ Mark H. McKinnies                
|                       |  |  |  | Mark H. McKinnies                    
|                       |  |  |  | Chief Financial Officer              



19



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EXHIBIT INDEX



|      |  |                                                                                                                                                                 
|----- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------
|      | 
|31.1* |  | Certification of Chief Executive Officer of ADA-ES, Inc. Pursuant to 17 CFR 240.13a-14(a) or 17 CFR 240.15d-14(a)                                               
|      | 
|31.2* |  | Certification of Chief Financial Officer of ADA-ES, Inc. Pursuant to 17 CFR 240.13a-14(a) or 17 CFR 240.15d-14(a)                                               
|      | 
|32.1* |  | Certification of Chief Executive Officer of ADA-ES, Inc. Pursuant to 18 U.S.C Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
|      | 
|32.2* |  | Certification of Chief Financial Officer of ADA-ES, Inc. Pursuant to 18 U.S.C Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002



|* | These certifications are furnished and shall not be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.
|- | -------------------------------------------------------------------------------------------------------------------------------------------------



20