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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): May 4, 2007

                             SOUTHWEST WATER COMPANY
             (Exact Name of Registrant as Specified in Its Charter)


      Delaware                         0-8176                    95-1840947
(State of Incorporation)        (Commission File Number)      (I.R.S. Employer
                                                             Identification No.)


One Wilshire Building
624 South Grand Avenue, Suite 2900
Los Angeles, CA                                                       90017-3782
(Address of principal executive offices)                              (Zip Code)


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

                                  ------------

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

                                  ------------


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 425 under the Securities 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 8.01 Other Events

On May 4, 2007 a news release was issued announcing the acquisition of a utility
in southeast Texas.

The information contained in the news release is incorporated herein by
reference and furnished as Exhibit 99.1.



Item 9.01 Financial Statements and Exhibits

(c)     Exhibits


Exhibit
  No.           Description
-------         -----------

99.1            News release dated May 4, 2007 announcing the acquisition of a
                utility in southeast Texas.


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                                    SIGNATURE

        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
                                        (Registrant)

                                        By: /s/ Cheryl L. Clary
                                            ------------------------------------
                                            Name:  Cheryl L. Clary
                                            Title: Chief Financial Officer


Date: May 4, 2007


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