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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): October 12, 2006

CALIFORNIA WATER SERVICE GROUP

(Exact name of Registrant as Specified in its Charter)


Delaware	1-13883	77-0448994
(State or other jurisdiction of incorporation)	(Commission file number)	(I.R.S. Employer Identification Number)


1720 North First Street San Jose, California		95112
(Address of principal executive offices)		(Zip Code)

(408) 367-8200
(Registrant’s telephone number, including area code)

N/A
(Former name or former address, if changed since last report)

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:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 7.01. Regulation FD Disclosure.

On October 12, 2006, the Company issued a press release attached as Exhibit 99.1 to this current report and incorporated by reference herein.

The information and exhibit shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Item 9.01. Financial Statements and Exhibits.

We hereby furnish the following exhibit with this report:


Exhibit No.		Description
99.1		Press Release issued October 12, 2006

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 hereunto duly authorized.


	CALIFORNIA WATER SERVICE GROUP
Date: October 13, 2006	By:	/s/ Calvin L. Breed
		Name:	Calvin L. Breed
		Title:	Controller, Assistant Secretary and Assistant Treasurer (Duly Authorized Officer)

Exhibit Index


Exhibit No.		Description
99.1		Press Release issued October 12, 2006

Exhibit 99.1


		NEWS RELEASE CALIFORNIA WATER SERVICE GROUP


	1720 North First Street	October 12, 2006
	San Jose, CA 95112-4598

Contact:	Marty Kropelnicki (408) 367-8200 (analysts)	For Immediate Release
	Shannon Dean (310) 257-1435 (media)

CALIFORNIA WATER SERVICE GROUP CLOSES PUBLIC OFFERING

OF COMMON STOCK INCLUDING OVER-ALLOTMENT OPTION

SAN JOSE, Calif. — California Water Service Group (NYSE: CWT) announced today that it has completed an underwritten public offering of 2,250,000 shares of its Common Stock (including 250,000 shares pursuant to the exercise, in part, by the underwriters of their over-allotment option) at a price per share of $36.75 to the public, raising approximately $82.7 million in gross proceeds.

The Company plans to add the net proceeds of approximately $79.1 million, after deducting underwriting commissions and expenses from the sale of the Common Stock, to its general funds to be used for general corporate purposes, such as investing in its subsidiaries, increasing its working capital, making capital expenditures, acquiring assets, and taking advantage of other business opportunities.

Robert W. Baird & Co. Incorporated acted as the sole bookrunning manager for the offering with A.G. Edwards & Sons, Inc. acting as joint lead-manager. Edward D. Jones & Co. L.P., J.J.B. Hilliard, W.L. Lyons, Inc., and Stifel, Nicolaus & Company, Incorporated acted as co-managers.

Copies of the final Prospectus Supplement may be obtained from Robert W. Baird & Co. Incorporated, Syndicate Department, 777 East Wisconsin Avenue, Milwaukee, WI 53202, or by calling 1- 800-RWBAIRD (1-800-792-2473).

This news release contains forward-looking statements within the meaning established by the Private Securities Litigation Reform Act of 1995 (“Act”). The forward-looking statements are intended to qualify under provisions of the federal securities laws for “safe harbor” treatment established by the Act. Forward-looking statements are based on currently available information, expectations, estimates, assumptions and projections, and management’s judgment about the Company, the water utility industry and general economic conditions. Such words as expects, intends, plans, believes, estimates, assumes, anticipates, projects, predicts, forecasts or variations of such words or similar expressions are intended to identify forward-looking statements. The forward-looking statements, such as the Company’s current intentions regarding the use of proceeds are not guarantees of future performance. They are subject to uncertainty and changes in circumstances. When considering forward-looking statements, you should keep in mind the cautionary statements included in this paragraph as well as other risk factors disclosed in the Company’s Registration Statement on Form S-3 for this offering, 10-K’s, 10-Q’s, 8-K’s and others filings made by the Company and on file with the SEC. The Company assumes no obligation to provide public updates of forward-looking statements.

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Source: California Water Service Group