================================================================================ 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): September 26, 2006 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 September 26, 2006 a press release was issued announcing multi-year rate increases for southern California service region. 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 Press release dated September 26, 2006, announcing multi-year rate increases for southern California service region. 2 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: September 26, 2006 3