SECURITIES AND EXCHANGE COMMISSION


                             Washington, D.C. 20549

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                                    FORM 8-K


                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(D) OF THE
                       SECURITIES AND EXCHANGE ACT OF 1934

                                 August 12, 2003
                Date of Report (Date of earliest event reported)


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                             SOUTHWEST WATER COMPANY

             (Exact name of registrant as specified in its charter)

        Delaware                          0-8176             95-1840947
(State or other Jurisdiction     (Commission File Number)   (IRS Employer
    of Incorporation)                                     Identification Number)

       225 North Barranca Avenue                               91791
               Suite 200                                     (Zip Code)
        West Covina, California
(Address of principal executive offices)

                                 (626) 915-1551
              (Registrant's telephone number, including area code)

                                       N/A
          (Former Name or Former Address, if Changed Since Last Report)









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Item 12   Results of Operations and Financial Condition

     On August 12,  2003,  Southwest  Water  Company  issued  the press  release
attached to this report as Exhibit  99.1  announcing  its results for the second
quarter of 2003.  This Form 8-K and the attached  exhibit are  furnished to, but
not filed with, the Securities and Exchange Commission.

EXHIBIT INDEX

Exhibits:
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99.1      Press  Release  "Southwest  Water  Company  Reports  Increased  Second
          Quarter Revenue and Earnings".




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 hereunto duly authorized.

                                              SOUTHWEST WATER COMPANY


Date:    August 12, 2003                      By:      /s/ RICHARD J. SHIELDS
                                                       ----------------------
                                              Name:    Richard J. Shields
                                              Title:   Chief Financial Officer