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**UNITED      STATES SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON,      D. C. 20549**

**FORM      8-K**

**CURRENT      REPORT**

**SOUTHERN      UNION COMPANY**

| Delaware                                                      | 1-6407                                  | 75-0571592                                                        |
|---------------------------------------------------------------|-----------------------------------------|-------------------------------------------------------------------|
| (State                or other jurisdiction of incorporation) | (Commission                File Number) | (I.R.S.                EmployerIdentification                No.) |

| 5444                Westheimer RoadHouston,                Texas(Address                of principal executive offices) | 77056-5306(Zip                Code) |
|-------------------------------------------------------------------------------------------------------------------------|-------------------------------------|

| [                ] | Written                communications pursuant to Rule 425 under the Securities Act (17                CFR                230.425) |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------|

| [                ] | Soliciting                material pursuant to Rule 14a-12 under the Exchange Act (17 CFR                240.14a-12) |
|--------------------|----------------------------------------------------------------------------------------------------------------------|

| [                ] | Pre-commencement                communications pursuant to Rule 14d-2(b) under the Exchange Act (17                CFR                240.14d-2(b)) |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------|
|               |                                                                                                                                                |
| [                ] | Pre-commencement                communications pursuant to Rule 13e-4(c) under the Exchange Act (17                CFR                240.13e-4(c)) |

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**ITEM      7.01 Regulation FD Disclosure**

**ITEM      9.01. Financial Statements and Exhibits.**

**(c)      Exhibits.**

**                            Exhibit      No.**
**Exhibit**

| 99.1 |  “Merrill                Lynch 2006 Gas and Power Conference”, presented by Southern Union Company                on September 27, 2006.  |
|------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|

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**SIGNATURES**

|                                          |                                                                                   |                                             |
|-----------------------------------------------|----------------------------------------------------------------------------------------|--------------------------------------------------|
|                                          | **SOUTHERN                UNION COMPANY**                                              |
|                                          | (Registrant)                                                                           |
|  Date:                September 27, 2006 |  By:                                                                              |  /s/                Robert M. Kerrigan, III |
|                                          | Robert                M. Kerrigan, III                                                 |
|                                          | Vice                President - Assistant General Counsel and                Secretary |

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**EXHIBIT      INDEX**

**                          Exhibit      No.**
**Description**

| 99.1 |  “Merrill                Lynch 2006 Power and Gas Conference”, presented by Southern Union Company                on September 27, 2006. |
|------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|

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