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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): December 8, 2005

                             SOUTHWEST WATERCOMPANY
             (Exact Name of Registrant as Specified in its Charter)

           DELAWARE                       0-8176               95-1840947
(State or Other Jurisdiction of         (Commission          (IRS Employer
Incorporation or Organization)          File Number)      Identification Number)

                              ONE WILSHIRE BUILDING
                       624 SOUTH GRAND AVENUE, SUITE 2900
                       LOS ANGELES, CALIFORNIA 90017-3782
          (Address of Principal Executive Offices, including zip code)

                                 (213) 929-1800
              (Registrant's telephone number, including area code)

     Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

     [_] 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

On December 8, 2005 the Company issued a press release announcing the start of a
$7 million annual water treatment contract in Burbank, Calif. A copy of this
press release is being furnished as Exhibit 99.1 to this Current Report on Form
8-K.

In accordance with General Instruction B.2 of Form 8-K, the information in this
Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed "filed"
for the purposes of Section 18 of the Securities Exchange Act of 1934 or
otherwise subject to the liability of that section, nor shall it be deemed
incorporated by reference in any filing under the Securities Act of 1933.



Item 9.01   Financial Statements and Exhibits

(c)  Exhibits

99.1  News release dated December 8, 2005, announcing the start of a $7 million
      annual water treatment contract in Burbank, Calif..



                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereto duly authorized.

                                          SOUTHWEST WATER COMPANY


                                          By:   /S/ CHERYL L. CLARY
                                                -----------------------------
                                                Cheryl L. Clary
                                                Chief Financial Officer


Dated:  December 9, 2005