|                        | **United                  States Securities and Exchange Commission**         |
|-----------------------------|-------------------------------------------------------------------------------|
|                        |                                                                          |
|                        | **Washington,                  D.C. 20549**                                   |
|                        |                                                                          |
|                        | **Form                  10 QSB**                                              |
|                        |                                                                          |
| (Mark                  One) |                                                                          |
|                        |                                                                          |
| **R**                       | **QUARTERLY                  REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE** |
|                        | **SECURITIES                  EXCHANGE ACT OF 1934**                          |
|                        |                                                                          |
|                        | For                  the quarterly period ended September 30, 2006            |
|                        |                                                                          |
| o                           | **TRANSITION                  REPORT UNDER SECTION 13 OR 15 (d) OF THE**      |
|                        | **SECURITIES                  EXCHANGE ACT OF 1934**                          |
|                        |                                                                          |
|                        | For                  the transition period from _____ to _____                |
|                        |                                                                          |
|                        | Commission                  file number 0-51272                               |
|                        |                                                                          |
|                        |                                                                          |
|                        | **ATLAS                  AMERICA SERIES 25-2004 (A) L.P.**                    |
|                        | (Name                  of small business issuer in its charter)               |
|                        |                                                                          |

|                                                                                                                                                                                    |                                                                  |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------|
|                                                                                                                                                                                    |                                                                  |
| **Delaware**                                                                                                                                                                            | **55-0856393**                                                        |
| (State                  or other jurisdiction ofincorporation                  or organization)                                                                                         | (I.R.S.                  EmployerIdentification                  No.) |
|                                                                                                                                                                                    |                                                                  |
| 311                  Rouser Road                                                                                                                                                        | 15108                                                                 |
| Moon                  Township, PA                                                                                                                                                      | (zip                  code)                                           |
| (Address                  of principal executive offices)                                                                                                                               |                                                                  |
|                                                                                                                                                                                    |                                                                  |
| Issuer’s                  telephone number, including area code: **(412)                  262-2830**                                                                              |
|                                                                                                                                                                                    |
| Check                  whether the issuer (1) filed all reports required to be filed by                  Section                  13 or 15 (d) of the Exchange Act                      |
| during                  the past 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** ****R**                  No                  o |
|                                                                                                                                                                                    |
| Indicate                  by check mark whether the registrant is a shell company (as defined                  in                  Rule 12b-2 of the Exchange                           |
| Act).Yes                  o                  No                  **R**                                                                                                                  |
|                                                                                                                                                                                    |
| Transitional                  Small Business Disclosure Format (check one): Yes o                  No                  **R**                                                            |

----

**ATLAS        AMERICA SERIES 25-2004 (A) L.P.**

**INDEX        TO QUARTERLY REPORT**

**ON        FORM 10-QSB**

| **PART                  I.**  |   | **FINANCIAL                  INFORMATION**                                                                                                  | **PAGE** |
|-------------------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------|----------|
|                          |   |                                                                                                                                        |     |
| Item                  1:      |   | Financial                  Statements                                                                                                       |     |
|                          |   |                                                                                                                                        |     |
|                          |   | Balance                  Sheets as of September 30, 2006 and December 31, 2005                  (Unaudited)                                 | 3        |
|                          |   |                                                                                                                                        |     |
|                          |   | Statements                  of Operations for the Three and Nine months ended September 30,                  2006 and                  2005 |     |
|                          |   | (Unaudited)                                                                                                                                 | 4        |
|                          |   |                                                                                                                                        |     |
|                          |   | Statement                  of Partners’ Capital Accounts for the Nine months ended September 30,                  2006                |     |
|                          |   | (Unaudited)                                                                                                                                 | 5        |
|                          |   |                                                                                                                                        |     |
|                          |   | Statements                  of Cash Flows for the Nine months ended September 30, 2006 and                  2005                            |     |
|                          |   | (Unaudited)                                                                                                                                 | 6        |
|                          |   |                                                                                                                                        |     |
|                          |   | Notes                  to Financial Statements (Unaudited)                                                                                  | 7-12     |
|                          |   |                                                                                                                                        |     |
| Item                  2:      |   | Management’s                  Discussion and Analysis of Financial Condition or Plan of                  Operations                   | 12-15    |
|                          |   |                                                                                                                                        |     |
| Item                  3:      |   | Controls                  and Procedures                                                                                                    | 16       |
|                          |   |                                                                                                                                        |     |
| **PART                  II.** |   | **OTHER                  INFORMATION**                                                                                                      |     |
|                          |   |                                                                                                                                        |     |
| Item                  6:      |   | Exhibits                                                                                                                                    | 16       |
|                          |   |                                                                                                                                        |     |
|                          |   |                                                                                                                                        |     |
| **SIGNATURES**                | 17     |
|                          |   |                                                                                                                                        |     |
| **CERTIFICATIONS**            | 18-21  |

----

**PART        I**

**ITEM        1. FINANCIAL STATEMENTS**

**ATLAS        AMERICA SERIES 25-2004(A) L.P.**

**BALANCE        SHEETS**

**(Unaudited)**

|                                                         |   | **September                  30,** |       | **December                  31,** |   |
|--------------------------------------------------------------|--------|------------------------------------|------------|-----------------------------------|--------|
|                                                         |   | **2006**                           |       | **2005**                          |   |
|                                                         |   |                               |       |                              |   |   |   |
| **ASSETS**                                                   |   |                               |       |                              |   |   |   |
| Current                  Assets:                             |   |                               |       |                              |   |   |   |
| Cash                  and cash equivalents                   |   | $                                  | 688,400    |                              | $      | 2,300 |   |
| Accounts                  receivable-affiliate               |   |                               | 2,086,000  |                              |   | 4,846,900 |   |
| Hedge                  receivable short-term-affiliate       |   |                               | 1,175,700  |                              |   | 182,500 |   |
| Total                  current assets                        |   |                               | 3,950,100  |                              |   | 5,031,700 |   |
|                                                         |   |                               |       |                              |   |   |   |
| Oil                  and gas properties, net            |   |                               | 27,490,700 |                              |   | 30,018,000 |   |
|                                                         |   |                               |       |                              |   |   |   |
| Hedge                  receivable long-term-affiliate   |   |                               | 1,257,900  |                              |   | ― |   |
|                                                         |   | $                                  | 32,698,700 |                              | $      | 35,049,700 |   |
|                                                         |   |                               |       |                              |   |   |   |
| **LIABILITIES                  AND PARTNERS’ CAPITAL** |   |                               |       |                              |   |   |   |
| Current                  liabilities:                        |   |                               |       |                              |   |   |   |
| Accrued                  liabilities                    |   | $                                  | 13,400     |                              | $      | 22,500 |   |
| Hedge                  liability short-term-affiliate        |   |                               | ―    |                              |   | 17,800 |   |
| Total                  current liabilities                   |   |                               | 13,400     |                              |   | 40,300 |   |
|                                                         |   |                               |       |                              |   |   |   |
| Asset                  retirement obligation            |   |                               | 1,178,700  |                              |   | 1,147,000 |   |
| Hedge                  liability long-term-affiliate    |   |                               | 120,700    |                              |   | 798,300 |   |
|                                                         |   |                               |       |                              |   |   |   |
|                                                         |   |                               |       |                              |   |   |   |
| Partners’                  capital:                    |   |                               |       |                              |   |   |   |
| Managing                  general partner                    |   |                               | 7,318,900  |                              |   | 8,366,000 |   |
| Limited                  partners (1,106.76 units)           |   |                               | 21,754,100 |                              |   | 25,331,800 |   |
| Accumulated                  comprehensive income (loss)     |   |                               | 2,312,900  |                              |   | (633,700 | ) |
|                                                         |   |                               | 31,385,900 |                              |   | 33,064,100 |   |
|                                                         |   | $                                  | 32,698,700 |                              | $      | 35,049,700 |   |

----

**ATLAS        AMERICA SERIES 25-2004(A) L.P.**

**STATEMENTS        OF OPERATIONS **

**(Unaudited)**

|                                                       |   | **Three                  Months Ended** |      | **Nine                  Months Ended** |   |
|------------------------------------------------------------|--------|-----------------------------------------|-----------|----------------------------------------|--------|
|                                                       |   | **September                  30,**      |      | **September                  30,**     |   |
|                                                       |   | **2006**                                |      | **2005**                               |   | **2006** |   | **2005** |   |
| **REVENUES:**                                              |   |                                    |      |                                   |   |   |   |   |   |   |   |   |   |
| Natural                  gas and oil sales                 |   | $                                       | 2,406,500 |                                   | $      | 2,582,700 |   | $ | 8,419,300 |   | $ | 8,413,000 |   |
| Total                  revenues                            |   |                                    | 2,406,500 |                                   |   | 2,582,700 |   |   | 8,419,300 |   |   | 8,413,000 |   |
|                                                       |   |                                    |      |                                   |   |   |   |   |   |   |   |   |   |
| **COSTS                  AND EXPENSES:**                   |   |                                    |      |                                   |   |   |   |   |   |   |   |   |   |
| Production                  expenses                  |   |                                    | 412,800   |                                   |   | 303,100 |   |   | 1,298,800 |   |   | 804,300 |   |
| Depletion                                             |   |                                    | 802,600   |                                   |   | 1,121,500 |   |   | 2,658,700 |   |   | 3,724,400 |   |
| Accretion                  of asset retirement obligation  |   |                                    | 10,600    |                                   |   | 10,000 |   |   | 31,700 |   |   | 29,900 |   |
| General                  and administrative expenses  |   |                                    | 34,100    |                                   |   | 55,200 |   |   | 111,400 |   |   | 126,600 |   |
| Total                  expenses                            |   |                                    | 1,260,100 |                                   |   | 1,489,800 |   |   | 4,100,600 |   |   | 4,685,200 |   |
|                                                       |   |                                    |      |                                   |   |   |   |   |   |   |   |   |   |
| **Net                  earnings**                     |   | $                                       | 1,146,400 |                                   | $      | 1,092,900 |   | $ | 4,318,700 |   | $ | 3,727,800 |   |
|                                                       |   |                                    |      |                                   |   |   |   |   |   |   |   |   |   |
| **Allocation                  of net earnings:**           |   |                                    |      |                                   |   |   |   |   |   |   |   |   |   |
| Managing                  general partner                  |   | $                                       | 521,200   |                                   | $      | 694,900 |   | $ | 1,998,200 |   | $ | 1,940,100 |   |
| Limited                  partners                          |   | $                                       | 625,200   |                                   | $      | 398,000 |   | $ | 2,320,500 |   | $ | 1,787,700 |   |
| Net                  earnings per limited partnership unit |   | $                                       | 565       |                                   | $      | 359 |   | $ | 2,097 |   | $ | 1,615 |   |

----

**ATLAS        AMERICA SERIES 25-2004(A) L.P.**

**STATEMENT        OF PARTNERS’ CAPITAL ACCOUNTS **

**FOR        THE NINE MONTHS ENDED September 30, 2006**

**(Unaudited)**

|                                                      |   | **Managing** |       |         |   | **Accumulated**                    |   |      |      |
|-----------------------------------------------------------|--------|--------------|------------|--------------|--------|------------------------------------|--------|-----------|-----------|
|                                                      |   | **General**  |       | **Limited**  |   | **Comprehensive**                  |   |      |      |
|                                                      |   | **Partner**  |       | **Partners** |   | **Income                  (Loss)** |   | **Total** |      |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| **Balance                  at January 1, 2006**           |   | $            | 8,366,000  |         | $      | 25,331,800                         |   | $         | (633,700  | ) | $ | 33,064,100 |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| Participation                  in revenues and expenses:  |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| Net                  production revenues                  |   |         | 2,492,200  |         |   | 4,628,300                          |   |      | ―   |   |   | 7,120,500 |   |
| Depletion                                                 |   |         | (443,900   | )            |   | (2,214,800                         | )      |      | ―   |   |   | (2,658,700 | ) |
| Accretion                  of asset retirement obligation |   |         | (11,100    | )            |   | (20,600                            | )      |      | ―   |   |   | (31,700 | ) |
| General                  and administrative               |   |         | (39,000    | )            |   | (72,400                            | )      |      | ―   |   |   | (111,400 | ) |
| Net                  earnings                             |   |         | 1,998,200  |         |   | 2,320,500                          |   |      | ―   |   |   | 4,318,700 |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| Additional                  MGP contribution              |   |         | 129,800    |         |   | ―                            |   |      | ―   |   |   | 129,800 |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| Other                  comprehensive income               |   |         | ―    |         |   | ―                            |   |      | 2,946,600 |   |   | 2,946,600 |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| Distributions                  to partners                |   |         | (3,175,100 | )            |   | (5,898,200                         | )      |      | ―   |   |   | (9,073,300 | ) |
|                                                      |   |         |       |         |   |                               |   |      |      |   |   |   |   |
| **Balance                  at September 30, 2006**        |   | $            | 7,318,900  |         | $      | 21,754,100                         |   | $         | 2,312,900 |   | $ | 31,385,900 |   |

----

**ATLAS        AMERICA SERIES 25-2004(A) L.P.**

**STATEMENTS        OF CASH FLOWS **

**(Unaudited)**

|                                                                                                                  |   | **Nine                  Months Ended** |       |
|-----------------------------------------------------------------------------------------------------------------------|--------|----------------------------------------|------------|
|                                                                                                                  |   | **September                  30,**     |       |
|                                                                                                                  |   | **2006**                               |       | **2005** |   |
| **Cash                  flows from operating activities:**                                                            |   |                                   |       |   |   |   |   |
| Net                  earnings                                                                                         |   | $                                      | 4,318,700  |   | $ | 3,727,800 |   |
| Adjustments                  to reconcile net earnings to net cash provided by operating                  activities: |   |                                   |       |   |   |   |   |
| Depletion                                                                                                             |   |                                   | 2,658,700  |   |   | 3,724,400 |   |
| Accretion                  of asset retirement obligation                                                             |   |                                   | 31,700     |   |   | 29,900 |   |
| Decrease                  (increase) in accounts receivable - affiliate                                               |   |                                   | 2,760,900  |   |   | (471,100 | ) |
| (Decrease)                  increase in accrued liabilities                                                           |   |                                   | (9,100     | ) |   | 11,100 |   |
| Net                  cash provided by operating activities                                                       |   |                                   | 9,760,900  |   |   | 7,022,100 |   |
|                                                                                                                  |   |                                   |       |   |   |   |   |
| **Cash                  flows from investing activities:**                                                            |   |                                   |       |   |   |   |   |
| Purchase                  of tangible equipment                                                                  |   |                                   | (4,600     | ) |   | ― |   |
| Proceeds                  from sale of tangible equipment                                                        |   |                                   | 3,100      |   |   | ― |   |
| Net                  cash used in investing activities                                                           |   |                                   | (1,500     | ) |   | ― |   |
|                                                                                                                  |   |                                   |       |   |   |   |   |
| **Cash                  flows from financing activities:**                                                            |   |                                   |       |   |   |   |   |
| Distributions                  to partners                                                                            |   |                                   | (9,073,300 | ) |   | (6,248,200 | ) |
| Net                  cash used in financing activities                                                                |   |                                   | (9,073,300 | ) |   | (6,248,200 | ) |
|                                                                                                                  |   |                                   |       |   |   |   |   |
| Net                  increase in cash and cash equivalents                                                       |   |                                   | 686,100    |   |   | 773,900 |   |
| Cash                  and cash equivalents at beginning of period                                                |   |                                   | 2,300      |   |   | 100 |   |
| Cash                  and cash equivalents at end of period                                                      |   | $                                      | 688,400    |   | $ | 774,000 |   |
|                                                                                                                  |   |                                   |       |   |   |   |   |
| **Supplemental                  schedule of non-cash investing and financing                  activities:**           |   |                                   |       |   |   |   |   |
|                                                                                                                  |   |                                   |       |   |   |   |   |
| Managing                  General Partner adjusted asset contributions:                                               |   |                                   |       |   |   |   |   |
| Lease                  cost included in oil and gas properties                                                        |   | $                                      | ―    |   | $ | (141,300 | ) |
| Tangible                  equipment cost included in oil and gas properties                                           |   |                                   | 39,500     |   |   | (1,977,200 | ) |
| Intangible                  drilling cost included in oil and gas properties                                          |   |                                   | 90,300     |   |   | 97,900 |   |
|                                                                                                                  |   | $                                      | 129,800    |   | $ | (2,020,600 | ) |

----

**ATLAS        AMERICA SERIES 25-2004(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS**

**September        30, 2006**

**(Unaudited)**

**NOTE        1 **
**-**
**        NATURE OF OPERATIONS**

**NOTE        2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES**

**Recently        Issued Financial Accounting Standards**

*Considering        the Effects of Prior Year Misstatements when Quantifying Misstatements in        Current Year Financial Statements*

*Fair        Value*
*Measurement*

----

**ATLAS        AMERICA SERIES 25-2004(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS**

**September        30, 2006**

**(Unaudited)**

**NOTE        2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)**

**Receivables**

**Revenue        Recognition**

**Reclassifications**

**Asset        Retirement Obligation**

*Accounting        for Asset Retirement Obligations*

|                                                                |   | **Three                  Months** |      | **Nine                  Months** |   |
|---------------------------------------------------------------------|--------|-----------------------------------|-----------|----------------------------------|--------|
|                                                                |   | **2006**                          |      | **2005**                         |   | **2006** |   | **2005** |   |
| Asset                  retirement obligation at beginning of period |   | $                                 | 1,168,100 |                             | $      | 683,300 |   | $ | 1,147,000 |   | $ | 663,400 |   |
| Accretion                  expense                                  |   |                              | 10,600    |                             |   | 10,000 |   |   | 31,700 |   |   | 29,900 |   |
| Total                  asset retirement obligation at end of period |   | $                                 | 1,178,700 |                             | $      | 693,300 |   | $ | 1,178,700 |   | $ | 693,300 |   |

**Concentration        of Credit Risk**

----

**ATLAS        AMERICA SERIES 25-2004(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS**

**September        30, 2006**

**(Unaudited)**

**NOTE        2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)**

**Property        and Equipment**

| Oil                  and gas properties consist of the following at the dates                  indicated: |   | **September                  30,** |       | **December                  31,** |   |
|-----------------------------------------------------------------------------------------------------------|--------|------------------------------------|------------|-----------------------------------|--------|
|                                                                                                      |   | **2006**                           |       | **2005**                          |   |
| Capitalized                  costs of properties:                                                         |   |                               |       |                              |   |   |   |
| Proved                  properties                                                                        |   | $                                  | 747,700    |                              | $      | 747,700 |   |
| Wells                  and related equipment                                                              |   |                               | 35,908,800 |                              |   | 35,777,400 |   |
|                                                                                                      |   |                               | 36,656,500 |                              |   | 36,525,100 |   |
|                                                                                                      |   |                               |       |                              |   |   |   |
| Accumulated                  depletion                                                                    |   |                               | (9,165,800 | )                                 |   | (6,507,100 | ) |
|                                                                                                      |   | $                                  | 27,490,700 |                              | $      | 30,018,000 |   |

**NOTE        3 **
**-**
**        TRANSACTIONS WITH ATLAS RESOURCES, LLC AND ITS AFFILIATES**

| l  | Administrative                costs which are included in general and administrative expenses in                the                Partnership’s Statements of Operations are payable at $75 per well per                month. Administrative costs incurred for the three months ended September                30, 2006 and 2005 were $28,800 and $26,300, respectively; and $84,800                and                $67,900 for the nine months ended September 30, 2006 and 2005,                respectively. |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **l ** | Monthly                well supervision fees which are included in production expenses in                the                Partnership’s Statements of Operations are payable at $289 per well per                month for operating and maintaining the wells. Well supervision fees                incurred for the three months ended September 30, 2006 and 2005 were                $115,300 and $96,400, respectively; and $323,900 and $248,800 for                the nine                months ended September 30, 2006 and 2005,                respectively. |
|-------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| l  | Transportation                fees which are included in production expenses in the Partnership’s                Statements of Operations are payable at rates ranging from $.29 -                $.35 per                mcf (one thousand cubic feet) to 10% of the natural gas sales price.                Transportation costs incurred for the three months ended September                30,                2006 and 2005 were $224,900 and $141,300, respectively; and $775,600                and                $386,700 for the nine months ended September 30, 2006 and 2005,                respectively. |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| l  | Adjusted                asset contributions from the Managing General Partner which are included                on the Statements of Cash Flows for the nine months ended September                30,                2006 and 2005 were $129,800 and $2,020,600, respectively. The adjustment                from September 30, 2005 resulted in a reduction to oil and gas                properties costs.. |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

**ATLAS        AMERICA SERIES 25-2004(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS**

**September        30, 2006**

**(Unaudited)**

**NOTE        3 **
**-**
**        TRANSACTIONS WITH ATLAS RESOURCES, LLC AND ITS AFFILIATES        (CONTINUED)**

**Comprehensive        Income**

|                                                          |   | **Three                  Months Ended** |      | **Nine                  Months Ended** |   |
|---------------------------------------------------------------|--------|-----------------------------------------|-----------|----------------------------------------|--------|
|                                                          |   | **September                  30,**      |      | **September                  30,**     |   |
|                                                          |   | **2006**                                |      | **2005**                               |   | **2006** |   | **2005** |   |
|                                                          |   |                                    |      |                                   |   |   |   |   |   |   |   |   |   |
| Net                  earnings                                 |   | $                                       | 1,146,400 |                                   | $      | 1,092,900 |   | $ | 4,318,700 |   | $ | 3,727,800 |   |
| Other                  comprehensive income:                  |   |                                    |      |                                   |   |   |   |   |   |   |   |   |   |
| Unrealized                  holding gain on hedging contracts |   |                                    | 2,117,000 |                                   |   | ― |   |   | 3,654,000 |   |   | ― |   |
| Less:                  reclassification adjustment for gains  |   |                                    |      |                                   |   |   |   |   |   |   |   |   |   |
| realized                  in net earnings                |   |                                    | (265,600  | )                                      |   | ― |   |   | (707,400 | ) |   | ― |   |
| Total                  other comprehensive income        |   |                                    | 1,851,400 |                                   |   | ― |   |   | 2,946,600 |   |   | ― |   |
| Comprehensive                  income                    |   | $                                       | 2,997,800 |                                   | $      | 1,092,900 |   | $ | 7,265,300 |   | $ | 3,727,800 |   |

**Subordination        of Managing General Partner’s Revenue Share**

**NOTE        4 - DERIVATIVE INSTRUMENTS**

----

**ATLAS        AMERICA SERIES 25-2004(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS**

**September        30, 2006**

**(Unaudited)**

**NOTE        4 - DERIVATIVE INSTRUMENTS (CONTINUED)**

| **Natural                  Gas Fixed - Price Swaps** |   |               |    |                             |   |
|------------------------------------------------------|--------|--------------------|---------|----------------------------------|--------|
|                                                 |   |               |    |                             |   |   |   |
| **Twelve                  Month Production**         |   |               |    | **Average**                      |   | **Fair                  Value** |   |
| **Period**                                           |   | **Volumes**        |    | **Fixed                  Price** |   | **Asset****(2)** |   |
| **Ended                  September 30,**             |   | **(MMBTU)****(1)** |    | **(per                  MMBTU)** |   | **(in                  thousands)** |   |
|                                                 |   |               |    |                             |   |   |   |   |   |   |
| 2007                                                 |   |               | 590,900 |                             | $      | 9.26 |   | $ | 1,176 |   |
| 2008                                                 |   |               | 855,700 |                             |   | 8.75 |   |   | 581 |   |
| 2009                                                 |   |               | 640,000 |                             |   | 8.65 |   |   | 460 |   |
| 2010                                                 |   |               | 142,000 |                             |   | 8.61 |   |   | 96 |   |
|                                                 |   |               |    |                             |   |   |   |   |   |   |
| Total                  asset                         | $      | 2,313              |    |

| (1)   | MMBTU                represents million British Thermal Units. |
|-----------------|----------------------------------------------------------------|
| (2)   | Fair                value based on forward NYMEX natural gas prices, as                applicable. |
|-----------------|----------------------------------------------------------------------------------------------------|

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**ATLAS        AMERICA SERIES 25-2004(A) L.P.**

**NOTES        TO FINANCIAL STATEMENTS**

**September        30, 2006**

**(Unaudited)**

**NOTE        4 - DERIVATIVE INSTRUMENTS (CONTINUED)**

|                                    |   | **September                  30, 2006** |   | **December                  31, 2005** |   |
|-----------------------------------------|--------|-----------------------------------------|--------|----------------------------------------|--------|
|                                    |   | **Book                  Value**         |   | **Fair                  Value**        |   | **Book                  Value** |   | **Fair                  Value** |   |
| Assets                                  |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Derivative                  instruments |   | $                                       | 2,434  |                                   | $      | 2,434 |   | $ | 182 |   | $ | 182 |   |
|                                    |   | $                                       | 2,434  |                                   | $      | 2,434 |   | $ | 182 |   | $ | 182 |   |
| Liabilities                             |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Derivative                  instruments |   | $                                       | (121   | )                                      | $      | (121 | ) | $ | (816 | ) | $ | (816 | ) |
|                                    |   | $                                       | 2,313  |                                   | $      | 2,313 |   | $ | (634 | ) | $ | (634 | ) |

**NOTE        5 - SUBSEQUENT EVENT**

| **ITEM                    2.** | **MANAGEMENT’S                    DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION OR                    PLAN** |
|--------------------------------|---------------------------------------------------------------------------------------------------------------------|
|                           | **OF                    OPERATIONS                    (UNAUDITED)**                                                 |

**Forward-Looking        Statements**

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**General**

**Results        of Operations**

|                                                 |   | **Three                  Months Ended** |   | **Nine                  Months Ended** |   |
|------------------------------------------------------|--------|-----------------------------------------|--------|----------------------------------------|--------|
|                                                 |   | **September                  30,**      |   | **September                  30,**     |   |
|                                                 |   | **2006**                                |   | **2005**                               |   | **2006** |   | **2005** |   |
|                                                 |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Production                  revenues (in thousands): |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Gas                                                  |   | $                                       | 2,300  |                                   | $      | 2,499 |   | $ | 8,259 |   | $ | 8,046 |   |
| Oil                                                  |   | $                                       | 106    |                                   | $      | 84 |   | $ | 160 |   | $ | 367 |   |
| Total                                                |   | $                                       | 2,406  |                                   | $      | 2,583 |   | $ | 8,419 |   | $ | 8,413 |   |
|                                                 |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Production                  volumes:                 |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Gas                  (mcf/day) (2)                   |   |                                    | 2,986  |                                   |   | 3,925 |   |   | 3,241 |   |   | 4,152 |   |
| Oil                  (bbls/day) (2)                  |   |                                    | 17     |                                   |   | 16 |   |   | 9 |   |   | 27 |   |
| Total                  (mcfe/day) (2)                |   |                                    | 3,088  |                                   |   | 4,021 |   |   | 3,295 |   |   | 4,314 |   |
|                                                 |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Average                  sales prices:               |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Gas                  (per mcf) (1) (2)               |   | $                                       | 8.37   |                                   | $      | 6.92 |   | $ | 9.33 |   | $ | 7.10 |   |
| Oil                  (per bbl) (2)                   |   | $                                       | 67.16  |                                   | $      | 58.30 |   | $ | 66.05 |   | $ | 50.13 |   |
|                                                 |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Average                  production costs:           |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| As                  a percent of sales               |   |                                    | 17     | %                                      |   | 12 | % |   | 15 | % |   | 10 | % |
| Per                  mcfe (2)                        |   | $                                       | 1.45   |                                   | $      | .82 |   | $ | 1.44 |   | $ | .68 |   |
|                                                 |   |                                    |   |                                   |   |   |   |   |   |   |   |   |   |
| Depletion                  per mcfe                  |   | $                                       | 2.82   |                                   | $      | 3.03 |   | $ | 2.96 |   | $ | 3.16 |   |

| (1)   | The                average sales price per mcf before the effects of hedging was $7.41                and                $8.46 for the three and nine months ended September 30, 2006,                respectively. There were no hedging transactions in the three and                nine                months ended September 30, 2005. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (2)   | “Mcf”                means thousand cubic feet, “mcfe” means thousand cubic feet equivalent and                “bbls” means barrels. Bbls are converted to mcfe using the ratio of six                mcfs to one bbl. |
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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**Natural        Gas Revenues**

**Oil        Revenues**

**Expenses.        **

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**Liquidity        and Capital Resources. **

**Critical        Accounting Policies**

**Recently        Issued Financial Accounting Standards**

*Considering        the Effects of Prior Year Misstatements when Quantifying Misstatements in        Current Year Financial Statements*

*Fair        Value*
*Measurement*

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**ITEM        3. CONTROLS AND PROCEDURES**

**Evaluation        of Disclosure Controls and Procedures**

**PART        II.**
**OTHER        INFORMATION**

**ITEM        6. Exhibits**

**EXHIBIT        INDEX**

| **Exhibit                  No.** |   | **Description**                                                                                                                                                           |
|----------------------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                             |   |                                                                                                                                                                      |
| 31.1                             |   | Certification                  Pursuant to Rule 13a-14/15(d)-14                                                                                                           |
| 31.2                             |   | Certification                  Pursuant to Rule 13a-14/15(d)-14                                                                                                           |
| 32.1                             |   | Certification                  Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section                  906 of                  the Sarbanes-Oxley Act of 2002 |
| 32.2                             |   | Certification                  Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section                  906 of                  the Sarbanes-Oxley Act of 2002 |

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**SIGNATURES**

| Pursuant                  to the requirements of the Securities of the Exchange Act of 1934,                  the                  registrant has duly caused this |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| report                  to be signed on its behalf by the undersigned, thereunto duly                  authorized.                                                 |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| Atlas                  America Series 25-2004 (A) L.P.                                                                                                             |   |   |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   | Atlas                  Resources, LLC, Managing General Partner |
|                                                                                                                                                               |   |   |
| Date:                  November 14, 2006                                                                                                                           |   | By:/s/                  Freddie M. Kotek |
|                                                                                                                                                               |   | Freddie                  M. Kotek, Chairman of the Board of Directors, Chief |
|                                                                                                                                                               |   | Executive                  Officer and President |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| In                  accordance with the Exchange Act, this report has been signed by                  the                  following persons on behalf of the      |
| registrant                  and in the capacities and on the dates indicated.                                                                                      |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| Date:                  November 14, 2006                                                                                                                           |   | By:/s/                  Freddie M. Kotek |
|                                                                                                                                                               |   | Freddie                  M. Kotek, Chairman of the Board of Directors, Chief |
|                                                                                                                                                               |   | Executive                  Officer and President |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |
| Date:                  November 14, 2006                                                                                                                           |   | By:/s/                  Nancy J. McGurk |
|                                                                                                                                                               |   | Nancy                  J. McGurk, Vice President, Chief Financial Officer and |
|                                                                                                                                                               |   | Chief                  Accounting Officer |
|                                                                                                                                                               |   |   |
|                                                                                                                                                               |   |   |

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