8-K

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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): March 21, 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))


Item 8.01     Other Events


On March 21, 2007 the Company issued a press release announcing the promotion of
DeLise L. Keim to Vice President Corporate Communications.


The information contained in the news release is incorporated herein by
reference and furnished as Exhibit 99.0.


Item 9.01 Financial Statements and Exhibits

(c)      Exhibits


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

99.1      Press release dated March 21, 2007 announcing the promotion of
          DeLise L. Keim to Vice President Corporate Communications.


                                    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: March 21, 2007

EX-99.1

                                                                    Exhibit 99.0

                         Southwest Water Company Names
            DeLise L. Keim Vice President, Corporate Communications



    LOS ANGELES--(BUSINESS WIRE)--March 21, 2007--Southwest Water
Company (NASDAQ:SWWC) today announced the promotion of DeLise L. Keim
to Vice President, Corporate Communications, responsible for designing
and implementing the company's public, investor and employee
communications plans.

    "DeLise has worked diligently in her role as Southwest Water's
senior communications officer and made significant contributions to
the company's success," said Mark Swatek, Southwest Water chief
executive officer and chairman. "She is a strategic thinker and her
promotion is well earned."

    Keim, 44, joined Southwest Water in 2005 as Director of Corporate
Communications. She has more than eighteen years of experience in
corporate communications, public relations and marketing. Prior to
joining Southwest Water, she was principal and founder of Power Plan,
at which she developed business plans and provided strategic
communications counsel. She previously served as Senior Director of
Corporate Communications at Homestore, Inc., an Internet technology
company, where she was responsible for media and investor relations,
corporate reputation and crisis management and employee
communications. Keim earned a bachelor of business administration
degree, marketing and economics, from the University of Iowa. She
completed additional studies on the theory and practice of investor
relations at the University of Michigan and is an inactive certified
financial advisor with the National Association of Securities Dealers.

    Southwest Water Company provides a broad range of services
including water production, treatment and distribution; wastewater
collection and treatment; utility billing and collection; utility
infrastructure construction management; and public works services. The
company owns regulated public utilities and also serves cities,
utility districts and private companies under contract. More than two
million people depend on Southwest Water for high-quality, reliable
service. Additional information may be found on the company's website:
www.swwc.com.



    CONTACT: Southwest Water Company
             Cheryl Clary, 213-929-1800
             Chief Financial Officer
             www.swwc.com
             or
             PondelWilkinson Inc.
             Robert Jaffe, 310-279-5969
             www.pondel.com