Exhibit 4.16

                        CALIFORNIA WATER SERVICE COMPANY

                       SIXTH SUPPLEMENT TO NOTE AGREEMENT

                          Dated as of December 1, 2002

         Re:          $20,000,000 5.29% Series H Senior Notes
                              Due December 1, 2022

================================================================================


                                     -104-
<PAGE>

                       SIXTH SUPPLEMENT TO NOTE AGREEMENT

                                                                     Dated as of
                                                                December 1, 2002

To the Purchasers named in
Schedule A hereto

Ladies and Gentlemen:

         This  Sixth   Supplement  to  Note  Purchase   Agreement   (the  "Sixth
Supplement") is between  California  Water Service Company (the "Company") whose
address  is  1720  North  First  Street,  San  Jose,  California  95112  and the
institutional investors named on Schedule A attached hereto (the "Purchasers").

         Reference  is hereby made to that certain  Note  Agreement  dated as of
March 1, 1999 (the "Note  Agreement")  between the  Company  and the  purchasers
listed on Schedule I thereto. All capitalized terms not otherwise defined herein
shall have the same  meaning as specified  in the Note  Agreement.  Reference is
further made to Section 4.3 thereof which requires  that,  prior to the delivery
of any Additional Notes, the Company and each Additional Purchaser shall execute
and deliver a Supplement.

         The  Company  hereby  agrees  with the  Purchasers  named on Schedule A
hereto as follows:

         1. The  Company  has  authorized  the  issue  and  sale of  $20,000,000
aggregate  principal  amount of its 5.29%  Series H Senior Notes due December 1,
2022 (the  "Series H  Notes").  The Series H Notes,  together  with the Series B
Notes initially issued pursuant to the Note Agreement, the Series C Notes issued
pursuant to the First  Supplement to Note Agreement dated as of October 1, 2000,
the Series D Notes issued  pursuant to the Second  Supplement to Note  Agreement
dated as of September 1, 2001,  the Series E Notes issued  pursuant to the Third
Supplement to Note Agreement  dated as of May 1, 2002, the Series F Notes issued
pursuant to the Fourth Supplement to Note Agreement dated as of August 15, 2002,
the Series G Notes issued  pursuant to the Fifth  Supplement  to Note  Agreement
dated as of November 15, 2002 and each Series of Additional Notes which may from
time to time be issued  pursuant  to the  provisions  of Section 1.4 of the Note
Agreement,  are  collectively  referred to as the "Notes"  (such term shall also
include any such notes issued in substitution  therefor  pursuant to Section 9.2
of the Note  Agreement).  The Series H Notes shall be  substantially in the form
set out in  Exhibit 1 hereto  with such  changes  therefrom,  if any,  as may be
approved by the Purchasers and the Company.

         2. Subject to the terms and  conditions  hereof and as set forth in the
Note  Agreement  and  on  the  basis  of  the   representations  and  warranties
hereinafter  set forth,  the Company agrees to issue and sell to each Purchaser,
and each  Purchaser  agrees to purchase from the Company,


                                      -105-
<PAGE>

Series H Notes in the principal  amount set forth opposite such Purchaser's name
on Schedule A hereto at a price of 100% of the principal  amount  thereof on the
closing date hereafter mentioned.

         3. Delivery of the  $20,000,000  in aggregate  principal  amount of the
Series H Notes  will be made at the  offices  of Chapman  and  Cutler,  111 West
Monroe Street, Chicago,  Illinois 60603-4080 against payment therefor in Federal
Reserve or other funds current and immediately available at the principal office
of Bank of America,  ABA No. 121000358,  Account No. 14879-00161,  Account Name:
California  Water Service Company  Security Sales, in the amount of the purchase
price at 11:00 A.M., San Francisco, California time, on December 3, 2002 or such
later date (not later than December 6, 2002) as shall mutually be agreed upon by
the Company and the Purchasers of the Series H Notes (the "Closing Date").

         4. Prepayment of Notes.

         (a) Required Prepayments. On December 1, 2012 and on December 1 of each
year  thereafter  to and  including  December 1, 2021,  the Company  will prepay
$1,818,181.82 principal amount (or such lesser principal amount as shall then be
outstanding) of the Notes at par and without payment of the Make-Whole Amount or
any premium, provided that upon any partial prepayment permitted by Section 4(b)
or 4(c), the principal amount of each required  prepayment of the Notes becoming
due under this Section 4(a) on and after the date of such prepayment or purchase
shall be reduced in the same proportion as the aggregate unpaid principal amount
of the Notes is reduced as a result of such  prepayment  or  purchase.  No other
prepayments  are required to be made with respect to the Series H Notes prior to
the expressed  maturity date thereof other than  prepayments  made in connection
with an acceleration of the Series H Notes pursuant to the provisions of Section
6.3 of the Note Agreement.

         (b) Optional Prepayment with Premium. Upon compliance with Section 4(d)
below the Company shall have the  privilege,  at any time and from time to time,
of prepaying  the  outstanding  Notes of any Series,  either in whole or in part
(but if in part then in a minimum  principal  amount of  $100,000) by payment of
the  principal  amount of the Notes of such  Series,  or  portion  thereof to be
prepaid,  and accrued interest thereon to the date of such prepayment,  together
with a premium equal to the  Make-Whole  Amount,  determined as of five Business
Days prior to the date of such prepayment pursuant to this Section 4(b).

         (c) Optional  Prepayment  at Par in the Event of  Condemnation.  In the
event a Material  Condemnation  shall have occurred with respect to any property
of the Company or a Restricted  Subsidiary,  then upon  compliance  with Section
4(d) below the Company  shall have the privilege of applying the proceeds of any
condemnation award received in connection with such Material Condemnation to the
prepayment of the principal amount of the Notes of any Series then  outstanding,
or any portion  thereof to the extent of such  proceeds,  together  with accrued
interest  thereon to the date of such prepayment.  Any optional  prepayment made
pursuant to this Section 4(c) shall be without premium.

         (d) Notice of Optional Prepayments. The Company will give notice of any
prepayment of the Notes pursuant to Section 4(b) or 4(c) to each Holder of Notes
to be prepaid  not less than


                                     -106-
<PAGE>

30 days nor more than 60 days before the date fixed for such optional prepayment
specifying (a) such date, (b) the Section of this Sixth  Supplement  under which
the prepayment is to be made, (c) the principal  amount of the Holder's Notes to
be prepaid on such date, (d) whether a premium may be payable, (e) the date when
the premium,  if any, will be calculated,  (f) the estimated  premium,  together
with a reasonably  detailed  computation of such estimated premium,  and (g) the
accrued interest  applicable to the prepayment.  Such notice of prepayment shall
also  certify all facts,  if any,  which are  conditions  precedent  to any such
prepayment.  Notice of prepayment having been so given, the aggregate  principal
amount  of the Notes to be  prepaid  specified  in such  notice,  together  with
accrued interest  thereon and the premium,  if any, payable with respect thereto
shall become due and payable on the  prepayment  date  specified in said notice.
Not later than two Business Days prior to the prepayment  date specified in such
notice,  the Company shall  provide each Holder of a Note to be prepaid  written
notice of the premium,  if any,  payable in connection with such prepayment and,
whether or not any premium is payable, a reasonably detailed  computation of the
Make-Whole Amount.

         (e) Application of Prepayments.  In the case of each partial prepayment
of the Notes  pursuant to the  provisions of Section 4(b) or 4(c), the principal
amount of the Notes of the Series to be prepaid shall be allocated  among all of
the Notes of such Series at the time  outstanding  in  proportion,  as nearly as
practicable, to the respective unpaid principal amounts thereof.

         (f) Direct Payment.  Notwithstanding anything to the contrary contained
in the Note  Agreement,  this Sixth  Supplement or the Notes, in the case of any
Note owned by any Holder that is a Purchaser,  Additional Purchaser or any other
Institutional  Holder which has given written  notice to the Company  requesting
that  the  provisions  of this  Section  4(f)  shall  apply,  the  Company  will
punctually pay when due the principal thereof,  interest thereon and premium, if
any,  due with  respect to said  principal,  without  any  presentment  thereof,
directly to such Holder at its address set forth herein or such other address as
such Holder may from time to time  designate  in writing to the Company or, if a
bank account with a United  States bank is so  designated  for such Holder,  the
Company  will make such  payments in  immediately  available  funds to such bank
account,  marked for attention as indicated,  or in such other manner or to such
other  account in any United  States  bank as such  Holder may from time to time
direct in writing.

         (g) Make Whole Amount. The term "Make-Whole Amount" means, with respect
to any Series H Note, an amount equal to the excess,  if any, of the  Discounted
Value of the Remaining  Scheduled  Payments with respect to the Called Principal
of such  Note  over the  amount  of such  Called  Principal,  provided  that the
Make-Whole  Amount  may in no event  be less  than  zero.  For the  purposes  of
determining  the  Make-Whole  Amount,  the  following  terms have the  following
meanings:

                  "Called  Principal"  means, with respect to any Series H Note,
         the  principal  of such Note that is to be prepaid  pursuant to Section
         4(b) or has become or is  declared  to be  immediately  due and payable
         pursuant to Section 6.3 of the Note Agreement, as the context requires.

                  "Discounted Value" means, with respect to the Called Principal
         of any Series H Note, the amount  obtained by discounting all Remaining
         Scheduled  Payments  with

                                     -107-
<PAGE>

         respect to such Called  Principal from their  respective  scheduled due
         dates to the Settlement Date with respect to such Called Principal,  in
         accordance  with accepted  financial  practice and at a discount factor
         (applied on the same  periodic  basis as that on which  interest on the
         Series H Notes is payable) equal to the Reinvestment Yield with respect
         to such Called Principal.

                  "Reinvestment   Yield"  means,  with  respect  to  the  Called
         Principal  of any  Series H Note,  0.50%,  plus the  yield to  maturity
         implied by (i) the  yields  reported,  as of 10:00 A.M.  (New York City
         time) on the fifth  Business Day  preceding  the  Settlement  Date with
         respect to such Called Principal,  on the display page of the Bloomberg
         Financial Markets Services Screen PX1 or the equivalent screen provided
         by Bloomberg  Financial  Markets  Commodities  News for actively traded
         U.S.  Treasury  securities  having a  maturity  equal to the  Remaining
         Average Life of such Called  Principal as of such  Settlement  Date, or
         (ii) if such  yields  are not  reported  as of such time or the  yields
         reported as of such time are not  ascertainable,  the Treasury Constant
         Maturity  Series  Yields  reported,  for the  latest day for which such
         yields have been so reported as of the second  Business  Day  preceding
         the Settlement Date with respect to such Called  Principal,  in Federal
         Reserve  Statistical  Release H.15 (519) (or any  comparable  successor
         publication)  for actively  traded U.S.  Treasury  securities  having a
         constant  maturity  equal to the Remaining  Average Life of such Called
         Principal  as of such  Settlement  Date.  Such  implied  yield  will be
         determined,   if  necessary,  by  (a)  converting  U.S.  Treasury  bill
         quotations  to  bond-equivalent  yields  in  accordance  with  accepted
         financial  practice  and (b)  interpolating  linearly  between  (1) the
         actively traded U.S. Treasury security with the maturity closest to and
         greater than the  Remaining  Average  Life and (2) the actively  traded
         U.S.  Treasury  security with the maturity closest to and less than the
         Remaining Average Life.

                  "Remaining  Average  Life"  means,  with respect to any Called
         Principal,  the number of years (calculated to the nearest  one-twelfth
         year) obtained by dividing (i) such Called  Principal into (ii) the sum
         of the products obtained by multiplying (a) the principal  component of
         each Remaining  Scheduled Payment with respect to such Called Principal
         by (b) the number of years (calculated to the nearest one-twelfth year)
         that will  elapse  between  the  Settlement  Date with  respect to such
         Called Principal and the scheduled due date of such Remaining Scheduled
         Payment.

                  "Remaining  Scheduled  Payments"  means,  with  respect to the
         Called  Principal  of any Series H Note,  all  payments  of such Called
         Principal and interest  thereon that would be due after the  Settlement
         Date with respect to such Called Principal if no payment of such Called
         Principal  were made prior to its scheduled due date,  provided that if
         such Settlement  Date is not a date on which interest  payments are due
         to be made  under the terms of the  Series H Notes,  then the amount of
         the next succeeding  scheduled  interest payment will be reduced by the
         amount of interest  accrued to such  Settlement Date and required to be
         paid on such Settlement Date pursuant to Section 4(b) hereof or Section
         6.3 of the Note Agreement.

                  "Settlement  Date" means, with respect to the Called Principal
         of any Series H Note, the date on which such Called  Principal is to be
         prepaid pursuant to Section 4(b)


                                     -108-
<PAGE>

         hereof or has become or is declared to be  immediately  due and payable
         pursuant to Section 6.3 of the Note Agreement, as the context requires.

         5. Closing Conditions.

         (a) Conditions. The obligation of each Purchaser to purchase the Series
H Notes on the Closing Date shall be subject to the  performance  by the Company
of its agreements  hereunder which by the terms hereof are to be performed at or
prior to the time of delivery of the Series H Notes and to the following further
conditions precedent:

                  (i) Closing Certificate.  Such Purchaser shall have received a
         certificate  dated the Closing Date,  signed by the President or a Vice
         President  of the  Company,  the truth and accuracy of which shall be a
         condition to such Purchaser's obligation to purchase the Series H Notes
         proposed  to be sold to such  Purchaser  and to the effect that (1) the
         representations  and  warranties  of the Company set forth in Exhibit 2
         hereto are true and correct on and with  respect to the  Closing  Date,
         (2) the Company has performed all of its  obligations  hereunder  which
         are to be performed on or prior to the Closing Date, and (3) no Default
         or Event of Default has occurred and is continuing.

                  (ii)  Compliance   Certificate.   Such  Purchaser  shall  have
         received a  certificate  dated the Closing  Date,  signed by the Senior
         Financial Officer of the Company stating that such officer has reviewed
         the  provisions  of the Note  Agreement and this Sixth  Supplement  and
         setting forth the information  and  computation (in sufficient  detail)
         required in order to  establish  whether  the Company is in  compliance
         with Section 5.6 of the Note Agreement on the Closing Date.

                  (iii) Legal Opinions.  Such Purchaser shall have received from
         Bingham McCutchen LLP, counsel for the Company, and Chapman and Cutler,
         special  counsel for the  Purchasers,  their opinions dated the Closing
         Date,  in form  and  substance  satisfactory  to such  Purchasers,  and
         covering the matters set forth respectively in Exhibits 3 and 4 hereto.

                  (iv) Regulatory Approval. Prior to the Closing Date, the issue
         and sale of the  Series H Notes  shall  have  been duly  authorized  or
         approved by appropriate order of the Public Utilities Commission of the
         State of California (the  "Commission").  Such order shall be final and
         in full  force and  effect  and not  subject  to any  appeal,  hearing,
         rehearing or contest.  All conditions contained in any such order which
         are to be  fulfilled  on or prior to the issuance of the Series H Notes
         shall have been  fulfilled.  The Company  shall have  delivered  to the
         Purchasers and their special counsel a certified copy of such order and
         the application therefor.

                  (v) Related  Transactions.  The Company shall have consummated
         the sale of the entire principal amount of the Series H Notes scheduled
         to be sold on the Closing Date pursuant to this Sixth Supplement.

                                     -109-
<PAGE>

                  (vi)  Satisfactory  Proceedings.   All  proceedings  taken  in
         connection with the transactions contemplated by this Sixth Supplement,
         and all  documents  necessary  to the  consummation  thereof,  shall be
         satisfactory   in  form  and  substance  to  such  Purchaser  and  such
         Purchaser's  special counsel,  and such Purchaser shall have received a
         copy  (executed  or  certified  as may  be  appropriate)  of all  legal
         documents or proceedings  taken in connection with the  consummation of
         said transactions.

                  (vii)  Purchase  Permitted By  Applicable  Law. On the Closing
         Date, the purchase of Series H Notes shall (a) be permitted by the laws
         and regulations of each jurisdiction to which any Purchaser is subject,
         without recourse to provisions  (such as Section  1405(a)(8) of the New
         York  Insurance  Law)  permitting  limited   investments  by  insurance
         companies  without  restriction  as to the character of the  particular
         investment,   (b)  not  violate  any   applicable   law  or  regulation
         (including,  without  limitation,  Regulation U, T or X of the Board of
         Governors  of the  Federal  Reserve  System)  and (c) not  subject  any
         Purchaser  to any tax,  penalty or  liability  under or pursuant to any
         applicable law or regulation, which law or regulation was not in effect
         on the date hereof. If requested by any Purchaser, such Purchaser shall
         have received an Officer's Certificate certifying as to such matters of
         fact as such Purchaser may reasonably  specify to enable such Purchaser
         to determine whether such purchase is so permitted.

                  (viii) Payment of Special Counsel Fees. The Company shall have
         paid,   on  or  before  the  Closing  Date,   the  fees,   charges  and
         disbursements  of the Purchasers'  special counsel referred to in (iii)
         above, to the extent  reflected in a statement of such counsel rendered
         to the Company at least one Business Day prior to the Closing Date.

                  (ix) Private  Placement  Number.  A Private  Placement  Number
         issued by Standard & Poor's CUSIP Service Bureau (in  cooperation  with
         the  Securities   Valuation  Office  of  the  National  Association  of
         Insurance  Commissioners)  shall  have been  obtained  for the Series H
         Notes.

         (b) The  obligation  of the  Company  to  deliver  the  Series  H Notes
hereunder  is  subject  to the  conditions  that (i) the  Commission  shall have
authorized  the  issuance  and sale by the  Company of the Series H Notes at the
price herein provided and said  authorization  shall be in full force and effect
and (ii) the entire  principal amount of the Series H Notes scheduled to be sold
on the Closing Date pursuant to this Sixth  Supplement  shall have been tendered
by the  Purchasers.  If the  condition  specified in this Section 5(b) shall not
have been fulfilled prior to or on the Closing Date,  this Sixth  Supplement and
all the obligations of the Company hereunder,  except as provided in Section 9.4
of the Note Agreement, may be cancelled by the Company.

         (c) If on the Closing Date the Company fails to tender to any Purchaser
the  Series  H Notes  to be  issued  to any  Purchaser  on  such  date or if the
conditions specified in Section 5(a) have not been fulfilled, such Purchaser may
thereupon  elect to be  relieved  of all  further  obligations  under this Sixth
Supplement.  Without  limiting the  foregoing,  if the  conditions  specified in
Section 5(a) have not been fulfilled, such Purchaser may waive compliance by the
Company with any such condition to such extent as such Purchaser may in its sole
discretion

                                     -110-
<PAGE>


determine.  Nothing in this Section 5(c) shall operate to relieve the Company of
any of its obligations  hereunder or to waive any Purchaser's rights against the
Company.

         6. Each Purchaser  represents and warrants that the representations and
warranties  set forth in Section 3.2 of the Note  Agreement are true and correct
on the  date  hereof  with  respect  to the  Series  H Notes  purchased  by such
Purchasers.

         7. The Company and each Purchaser  agree to be bound by and comply with
the terms and  provisions  of the Note  Agreement as if such  Purchaser  were an
original signatory to the Note Agreement.


                                     -111-
<PAGE>




California Water Service Company
Sixth Supplement

         The execution  hereof shall  constitute a contract  between the Company
and the Purchaser(s)  for the uses and purposes  hereinabove set forth, and this
agreement  may  be  executed  in  any  number  of  counterparts,  each  executed
counterpart constituting an original but all together only one agreement.

                                       CALIFORNIA WATER SERVICE COMPANY



                                       By ______________________________
                                          Name:    Gerald F. Feeney
                                          Title:   Vice President, Chief
                                                   Financial Officer and
                                                   Treasurer


                                     -112-
<PAGE>



California Water Service Company
Sixth Supplement


Accepted as of December 1, 2002          AMERICAN GENERAL ASSURANCE COMPANY
                                         MERIT LIFE INSURANCE CO.
                                         NORTH CENTRAL LIFE INSURANCE COMPANY

                                             By:    AIG Global Investment Corp.,
                                                    Investment Advisor



                                             By     ___________________________
                                                    Name:
                                                    Title:




                                     -113-
<PAGE>


California Water Service Company
Sixth Supplement




Accepted as of  December 1, 2002


                                     GENERAL ELECTRIC CAPITAL ASSURANCE COMPANY



                                     By: _______________________________________
                                         Name:
                                         Title:




                                     FIRST COLONY LIFE INSURANCE COMPANY



                                     By: _______________________________________
                                         Name:
                                         Title:



                                     -114-
<PAGE>


                       INFORMATION RELATING TO PURCHASERS

                                                      PRINCIPAL AMOUNT OF SERIES
NAME AND ADDRESS OF PURCHASER                          H NOTES TO BE PURCHASED

AMERICAN GENERAL ASSURANCE COMPANY                          $5,000,000
c/o AIG Global Investment Corporation
P.O. Box 3247
Houston, Texas  77253-3247
Attention:  Private Placement Department, A36-04
Fax Number:  (713) 831-1072
Overnight Mailing Address:
2929 Allen Parkway, A36-04
Houston, Texas  77019-2155

Payments

All  payments  on or in  respect  of the  Notes to be by bank wire  transfer  of
Federal  or other  immediately  available  funds  (identifying  each  payment as
"California Water Service Company, 5.29% Senior Notes, Series H, due December 1,
2022, PPN 130789 N* 7, principal or interest") to:

Notices

All notices of payment on or in respect of the Notes and written confirmation of
each such payment to:

         American General Assurance Company and PA 86
         c/o State Street Bank and Trust Company
         Insurance Services
         801 Pennsylvania
         Kansas City, Missouri  64105
         Facsimile Number:  (816) 691-3619

Duplicate  payment  notices and all other  correspondences  to be  addressed  to
American General Assurance Company and PA 86 as first provided above with a copy
to:

         AIG Global Investment Corporation
         Legal Department - Investment Management
         2929 Allen Parkway, Suite A36-01
         Houston, Texas  77019-2155
         Facsimile Number:  (713) 831-2328

Name of Nominee in which Notes are to be issued:  None

Taxpayer I.D. Number:  36-1677770



                                   SCHEDULE A
                                 (to Supplement)

<PAGE>


                                                            PRINCIPAL AMOUNT OF
NAME AND ADDRESS OF PURCHASER                               SERIES H NOTES TO BE
                                                                 PURCHASED

MERIT LIFE INSURANCE COMPANY                                    $5,000,000
c/o AIG Global Investment Corporation
P. O. Box 3247
Houston, Texas  77253-3247
Attention:  Private Placement Department, A36-04
Fax Number:  (713) 831-1072
Overnight Mailing Address:
2929 Allen Parkway, A36-04
Houston, Texas  77019-2155

Payments

All  payments  on or in  respect  of the  Notes to be by bank wire  transfer  of
Federal  or other  immediately  available  funds  (identifying  each  payment as
"California Water Service Company, 5.29% Senior Notes, Series H, due December 1,
2022, PPN 130789 N* 7, principal or interest") to:

Notices

All notices of payment on or in respect of the Notes and written confirmation of
each such payment to:

         Merit Life Insurance Company and PA 20
         c/o State Street Bank Corporation
         Insurance Services
         801 Pennsylvania
         Kansas City, Missouri  64105
         Facsimile Number:  (816) 691-3619

Duplicate payment notices and all other correspondences to be addressed to Merit
Life Insurance Company and PA 20 as first provided above with a copy to:

         American General Enterprise Services, Inc.
         Legal Department - Investment Management
         2929 Allen Parkway, Suite A36-01
         Houston, Texas  77019-2155
         Facsimile Number:  (713) 831-2328

Name of Nominee in which Notes are to be issued:  None

Taxpayer I.D. Number:  35-1005090



                                      A-2
<PAGE>


                                                      PRINCIPAL AMOUNT OF SERIES
NAME AND ADDRESS OF PURCHASER                          H NOTES TO BE PURCHASED

NORTH CENTRAL LIFE INSURANCE COMPANY                        $2,000,000
c/o AIG Global Investment Corporation
P. O. Box 3247
Houston, Texas  77253-3247
Attention:  Private Placement Department, A36-04
Fax Number:  (713) 831-1072
Overnight Mailing Address:
2929 Allen Parkway, A36-04
Houston, Texas  77019-2155

Payments

All  payments  on or in  respect  of the  Notes to be by bank wire  transfer  of
Federal  or other  immediately  available  funds  (identifying  each  payment as
"California Water Service Company, 5.29% Senior Notes, Series H, due December 1,
2022, PPN 130789 N* 7, principal or interest") to:

Notices

All notices of payment on or in respect of the Notes and written confirmation of
each such payment to:

         North Central Life Insurance Company and PA 8D
         c/o State Street Bank Corporation
         Insurance Services
         801 Pennsylvania
         Kansas City, Missouri  64105
         Facsimile Number:  (816) 691-3619

Duplicate payment notices and all other correspondences to be addressed to North
Central Life Insurance Company and PA 8D as first provided above with a copy to:

         AIG Global Investment Corporation
         Legal Department - Investment Management
         2929 Allen Parkway, Suite A36-01
         Houston, Texas  77019-2155
         Facsimile Number:  (713) 831-2328

Name of Nominee in which Notes are to be issued:  None

Taxpayer I.D. Number:  41-0421280


                                      A-3
<PAGE>

                                                            PRINCIPAL AMOUNT OF
NAME AND ADDRESS OF PURCHASER                               SERIES H NOTES TO BE
                                                                PURCHASED

GENERAL ELECTRIC CAPITAL ASSURANCE COMPANY                     $6,000,000
c/o GE Financial Assurance
Account:  GECA LTC
Two Union Square, 601 Union Street
Seattle, Washington  98101
Attention:  Investment Department, Private Placements
Phone Number:  (206) 516-4954
Fax Number:  (206) 516-4578

Payments

All  payments  on or in  respect  of the  Notes to be by bank wire  transfer  of
Federal  or other  immediately  available  funds  (identifying  each  payment as
"California Water Service Company, 5.29% Senior Notes, Series H, due December 1,
2022, PPN 130789 N* 7, principal, premium or interest") to:

Notices

All notices  with  respect to payments  and  written  confirmation  of each such
payment, to be addressed:

         GE Financial Assurance
         Account:  General Electric Capital Assurance Company
         Two Union Square, 601 Union Street
         Seattle, Washington  98101
         Attention:  Investment Accounting
         Phone Number:  (206) 516-4649
         Fax Number:  (206) 516-4740

All  other  notices  and  communications  (including  original  note  agreement,
conformed copy of the note agreement,  amendment requests, financial statements)
to be addressed as first provided above.

Name of Nominee in which Notes are to be issued:  SALKELD & CO.

Taxpayer I.D. Number:  91-6027719



                                      A-4
<PAGE>

                                                      PRINCIPAL AMOUNT OF SERIES
NAME AND ADDRESS OF PURCHASER                           H NOTES TO BE PURCHASED

FIRST COLONY LIFE INSURANCE COMPANY                           $2,000,000
c/o GE Financial Assurance
Account:  First Colony Life Insurance Company
Two Union Square, 601 Union Street
Seattle, Washington  98101
Attention:  Investment Department, Private Placements
Telephone Number:  (206) 516-4954
Telefacsimile Number:  (206) 516-4578

Payments

All  payments  on or in  respect  of the  Notes to be by bank wire  transfer  of
Federal  or other  immediately  available  funds  (identifying  each  payment as
"California Water Service Company, 5.29% Senior Notes, Series H, due December 1,
2022, PPN 130789 N* 7, principal, premium or interest") to:

Notices

All notices  with  respect to payments  and  written  confirmation  of each such
payment to be addressed:

         GE Financial Assurance
         Account:  First Colony Life Insurance Company
         Two Union Square, 601 Union Street
         Seattle, Washington  98101
         Attention:  Investment Accounting
         Telephone Number:  (206) 516-4649
         Telefacsimile Number:  (206) 516-4740

All  other  notices  and  communications  (including  original  note  agreement,
conformed copy of the note agreement,  amendment requests, financial statements)
to be addressed as first provided above.

Name of Nominee in which Notes are to be issued:  Salkeld & Co.

Taxpayer I.D. Number:  54-0596414


                                      A-5
<PAGE>

                             [FORM OF SERIES H NOTE]

THIS NOTE HAS NOT BEEN  REGISTERED  WITH THE SECURITIES AND EXCHANGE  COMMISSION
UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND ANY SALE, TRANSFER,  PLEDGE OR
OTHER DISPOSITION THEREOF MAY BE MADE ONLY (1) IN A TRANSACTION REGISTERED UNDER
SAID ACT OR (2) IF AN EXEMPTION FROM REGISTRATION UNDER SAID ACT IS AVAILABLE.


                        CALIFORNIA WATER SERVICE COMPANY

                           5.29% Series H Senior Note
                              Due December 1, 2022

                                PPN: 130789 N* 7


No.                                                           December ___, 2002

$

         California  Water  Service  Company,  a  California   corporation  (the
"Company"), for value received, hereby promises to pay to



                              or registered assigns
                       on the first day of December, 2022,
                             the principal amount of


                                                         DOLLARS ($____________)

and to pay interest  (computed  on the basis of a 360-day year of twelve  30-day
months) on the principal amount from time to time remaining unpaid hereon at the
rate  of  5.29%  per  annum  from  the  date  hereof  until  maturity,   payable
semiannually on the first day of each June and December in each year (commencing
on the first of such dates after the date hereof) and at  maturity.  The Company
agrees to pay interest on overdue  principal  (including any overdue required or
optional  prepayment  of  principal)  and  premium,  if any,  and (to the extent
legally  enforceable)  on any overdue  installment  of interest,  at the rate of
7.29% per annum after the due date, whether by acceleration or otherwise,  until
paid. Both the principal hereof and interest hereon are payable at the principal
office of the Company in San Jose,  California in coin or currency of the United
States of  America  which at the time of payment  shall be legal  tender for the
payment of public and private debts.

         This Note is one of a series of Notes (the "Notes")  issued pursuant to
the Sixth Supplement (the "Sixth  Supplement") to the Note Agreement dated as of
March  1,  1999  (as from  time to time  amended  and  supplemented,  the  "Note
Agreement"),  between the Company,  the

                                    EXHIBIT 1
                                 (to Supplement)


<PAGE>


Purchasers  named therein and  Additional  Purchasers of Notes from time to time
issued  pursuant  to any  Supplement  to the Note  Agreement.  This Note and the
holder  hereof are  entitled  equally and ratably  with the holders of all other
Notes of all Series from time to time  outstanding  under the Note  Agreement to
all the  benefits  provided  for thereby or referred to therein.  Each holder of
this  Note  will  be  deemed,  by  its  acceptance  hereof,  to  have  made  the
representation  set forth in Section 3.2 of the Note  Agreement,  provided  that
such holder may (in reliance  upon  information  provided by the Company,  which
shall not be unreasonably withheld) make a representation to the effect that the
purchase by such holder of any Note will not constitute a non-exempt  prohibited
transaction under Section 406(a) of ERISA.

         This Note and the other Notes  outstanding under the Note Agreement may
be declared due prior to their expressed  maturity dates, all in the events,  on
the terms and in the manner and amounts as provided in the Note Agreement.

         The Company  will make the  required  prepayments  of  principal on the
dates and in the amounts  specified in Section 4(a) of the Sixth  Supplement and
at maturity  will pay the  principal  balance  due. The Notes are not subject to
prepayment or  redemption at the option of the Company prior to their  expressed
maturity  dates except on the terms and  conditions  and in the amounts and with
the premium, if any, set forth in the Note Agreement.

         This Note is registered on the books of the Company and is transferable
only by surrender  thereof at the principal  office of the Company duly endorsed
or  accompanied  by a  written  instrument  of  transfer  duly  executed  by the
registered  holder of this Note or its  attorney  duly  authorized  in  writing.
Payment of or on account of  principal,  premium,  if any,  and interest on this
Note  shall be made  only to or upon  the  order in  writing  of the  registered
holder.

         This Note shall be construed and enforced in accordance  with,  and the
rights of the parties  shall be governed by, the law of the State of  California
excluding  choice-of-law  principles of the law of such State that would require
the application of the laws of a jurisdiction other than such State.

                                       CALIFORNIA WATER SERVICE COMPANY



                                       By _______________________________
                                          Name:  ________________________
                                          Title:  _______________________

                                     E-1-2

<PAGE>

                         REPRESENTATIONS AND WARRANTIES

         The Company represents and warrants to each Purchaser that:

         1. Corporate Organization,  Subsidiaries. The Company is duly organized
and existing and in good  standing  under and by virtue of the laws of the State
of  California  and is duly  authorized  and  empowered  to own and  operate its
properties  and to carry on its  business,  all as and in the places  where such
properties  are now owned and  operated  and such  business  is  conducted.  The
Company has no Subsidiaries.

         2.  Corporate  Authority.  The  Company  has full  corporate  power and
corporate  authority to sell and issue the Series H Notes. The issuance and sale
of the Series H Notes and the  execution  and  delivery of the Sixth  Supplement
will have been duly  authorized  by the Board of Directors of the Company and by
the Public  Utilities  Commission of the State of California (the  "Commission")
prior to the Closing  Date,  and no other action is required to be taken by, and
no consents or approvals are required to be obtained from, the  shareholders  of
the Company or any public body or bodies,  and no other corporate  action of the
Company is requisite to such issue and sale.

         3. Business and Property.  Each Purchaser has heretofore been furnished
with a copy of the Company  Information which generally sets forth the principal
properties  of the  Company  and  the  business  conducted  and  proposed  to be
conducted by the Company.

         4.  Indebtedness.  Annex A  attached  hereto  correctly  describes  all
Current Debt, Funded Debt and Capitalized  Leases of the Company  outstanding on
September 30, 2002.

         5.  Financial  Statements  and Reports.  The Company has furnished each
Purchaser with a copy of its audited  financial  reports for 1999, 2000 and 2001
hereinafter  called  the  "Company  Reports,"  and a copy of Form 10-K  filed by
California Water Service Group ("CWSG")  hereinafter called the "CWSG 10-K" with
the  Securities and Exchange  Commission for 2001,  together with all reports or
documents  required to be filed by CWSG  pursuant to Sections  13(a) or 15(d) of
the  Securities  Exchange Act of 1934, as amended,  since the filing of the CWSG
10-K. The Company has also furnished each Purchaser with an unaudited  quarterly
financial  statement for the Company for the fiscal quarter ended  September 30,
2002,  and Forms 10 Q for CWSG for the fiscal  quarter ended  September 30, 2002
(the "Quarterly  Reports").  The financial statements contained in the foregoing
Company Reports, the CWSG 10-K, the Quarterly Reports and such other reports and
documents  were  prepared  in  accordance  with  generally  accepted  accounting
principles upon a consistent  basis and are complete and correct and the balance
sheets included therein fairly present the financial condition of the Company or
CWSG, as the case may be, as at the respective  dates thereof and the Statements
of Income,  Common  Shareholders'  Equity and Cash Flows included therein fairly
present the  results of the  operations  of the Company for the periods  covered
thereby,  subject  in the  case  of  unaudited  statements  to  normal  year-end
adjustments.

         6.  Material  Contracts.  The Company has no contracts or  commitments,
whether  contingent  or other,  which are material to the Company and which were
not made in the ordinary
                                    EXHIBIT 2
                                 (to Supplement)

<PAGE>

course of  business.  Certain  material  contracts  related to water  supply are
listed  in  Annex  B  hereto.  The  Company  has no  contracts  or  commitments,
contingent or other,  which materially and adversely affect or in the future may
(so far as the Company can foresee)  materially and adversely affect the Company
or its business, property, assets, operations or condition,  financial or other.
As of  December  31,  2001,  there were no material  liabilities  of the Company
(other than those under contracts entered into in the normal and ordinary course
of business),  actual,  contingent  or accrued,  which were not reflected in the
Company Reports and CWSG 10-K except for (i) liability in respect of uncompleted
construction  work  under  open  contracts  in  connection  with  the  Company's
construction  program and (ii) the obligations of the Company to contribute to a
pension plan, an employees' savings plan and a health and welfare plan.

         7. No  Material  Adverse  Change.  (a)  There has been no change in the
condition of the Company,  financial or other,  from that set forth or reflected
in the Company  Information,  other than changes  which may have occurred in the
ordinary course of business or by reason of ordinary  dividends paid or declared
or outstanding  First Mortgage Bonds redeemed by the Company in accordance  with
their terms,  and no such changes in the ordinary  course of business  have been
material adverse changes.

         (b)  Since  December  31,  2001,  neither  the  business,   operations,
properties  nor  assets of the  Company  have  been  adversely  affected  in any
material way by any casualties such as fire, windstorm, riot, strike, explosion,
accident, flood, earthquake,  lockout, sabotage, activities of armed forces, act
of God or the public enemy or  condemnation  of  properties by the United States
government or any municipal governmental agency, authority or body.

         8. Title to  Properties.  The  Company is engaged in the  business of a
public utility water company  serving all or a portion of the California  cities
and  communities  listed in the 2001 Company Report and paragraph 9 hereof.  The
Company  has  good  and  merchantable  title,  subject  only to the  lien of the
Mortgage  Indenture  and to current  tax and  assessment  liens,  rights-of-way,
easements  and certain  minor  liens,  encumbrances,  clouds or defects in title
which do not  materially  affect  the use  thereof,  to all the  material  water
distribution  facilities  (including,   without  limitation,   transmission  and
distribution  mains,  pump stations,  wells,  storage tanks and  reservoirs) and
other material units of property used in its business except as follows:

                  (a) some of the offices,  but not its principal office, are in
         leased premises and some wells, well sites and other minor distribution
         facilities are rented; and

                  (b) several  wells are  located on property  which the Company
         does not own but in which it has an easement  for the  location of such
         wells;

and except as to easements and  rights-of-way  and certain  parcels of land (not
exceeding for said parcels of land an aggregate book value of  $1,000,000)  with
respect to which there is a possibility of reverter if the property ceases to be
used for public utility  purposes,  and,  except that the greater portion of its
transmission and distribution  systems is located in public highways and streets
and in  rights-of-way  owned by the Company over lands of others,  the Company's
title thereto is fee simple. Except for parcels of land having an aggregate book
value of not more than $1,000,000,  the Company has good and merchantable  title
to all its other  property  and assets

                                     E-2-2
<PAGE>

subject only to the lien of the Mortgage Indenture and the lien of the Dominguez
Mortgage  Indenture and to current tax and assessment  liens and minor liens and
encumbrances  which  do  not  materially  affect  the  use  thereof.  All of the
properties  of  the  Company  are  located  in  the  State  of  California   and
substantially  all of the properties of the Company used or useful in its public
utility business are subject to the Mortgage Indenture. As used herein, the term
"Dominguez  Mortgage  Indenture" means the Trust Indenture dated as of August 1,
1954, as supplemented  from time to time,  between the Company,  as successor to
Dominguez Water Company ("Dominguez") and U.S. Bank, as Trustee,  which provides
a lien  on  properties  owned  by  Dominguez  immediately  prior  to the  merger
described  in  paragraph 9 hereof  which lien  secures  $9,000,000  in aggregate
principal  amount of Dominguez  bonds which were assumed by the Company upon the
merger.

         9. Franchises.  The Company has, in its judgment,  adequate  franchises
and  permits  without  burdensome   restrictions  (other  than  those  typically
contained  in  franchises  and  permits  of this  type) to allow the  Company to
conduct the business in which it is engaged.

         The Company has two classes of  franchises to install and operate water
pipes and mains under public streets and highways:

                  (a) so-called  "constitutional"  franchises obtained by virtue
         of the  provisions  of  Article  XI,  Section  19,  of  the  California
         Constitution, as in effect prior to 1911; and

                  (b) franchises granted pursuant to statutory authority.

         The Company  believes,  based on the advice of counsel (which is itself
based upon the assumption of the accuracy of information obtained by the Company
from sources  believed to be reliable  that the  following  cities served by the
Company were all incorporated prior to 1911:

           Bakersfield            Marysville             South San Francisco
           Chico                  Oroville               Stockton
           Dixon                  Redondo Beach          Visalia
           Hermosa Beach          Salinas                Willows
           King City              San Mateo
           Livermore              Selma

that water  distribution  systems were constructed and service  furnished to the
inhabitants  of each by various  predecessors  of the Company prior to 1911, and
that there were no public water works owned or controlled by the municipality in
any of them prior to 1911), that the Company has a "constitutional" franchise in
each of the above cities and under such constitutional franchise has a perpetual
right which was not  repealed  by the repeal of Article  XI,  Section 19, of the
California  Constitution  to continue to occupy  public  streets of each of said
cities  with its pipes and mains and to lay down  additional  pipes and mains in
said streets for the supplying of water, subject to reasonable regulation by the
respective  municipalities.  The Company also  believes,  based on the advice of
counsel,  that this right is not limited to streets in which pipes or mains were
laid  prior  to  1911  but   extends  at  least  to  all  streets  in  the  said
municipalities  as they  existed  at the date of  repeal  of the  constitutional
provision in 1911 and probably also extends to

                                     E-2-3
<PAGE>

territory  incorporated  into each respective  city after such repeal,  although
this  latter  question  remains  somewhat  in  doubt in the  absence  of a final
decision of the courts  thereon.  The Company  holds either by  assignment or as
original grantee franchises granted under statutory authority by the Counties of
Kern,  Los  Angeles,  San  Joaquin,  Santa  Clara and  Monterey,  the  Cities of
Montebello,   Torrance,   Cupertino,   Sunnyvale,   Los  Altos,  Mountain  View,
Bakersfield,  Commerce, San Carlos, Rolling Hills Estates and Thousand Oaks, and
the Towns of Los Altos Hills and Atherton.  Following  incorporation of the City
of Rancho Palos Verdes in 1973, the Company made franchise  payments to the City
and the City accepted the same as successor in interest to the grantor's  rights
under the Company's  former  franchise from the County of Los Angeles;  the City
has  agreed  that the  Company  may  exercise  its  rights in the City under its
current  County  franchise  until the  expiration of that franchise in 2012. The
Company's  franchises  from the Cities of Palos Verdes  Estates,  Menlo Park and
Woodside  terminated  in 1977,  1993 and 1994,  respectively.  While none of the
Cities and the Company have executed a new franchise agreement,  the Company has
made and will  continue  to make  franchise  payments  to each of the  Cities in
accordance with the provisions of the prior franchise.  In other areas where the
Company has no franchise, the Company or its predecessors have distributed water
for many years and, to the Company's knowledge, no question has ever been raised
as to the right to make such  distribution  and to maintain  all pipes and mains
necessary therefor.

         On May 25,  2000,  Dominguez  Service  Corporation  was merged into the
Company and subsequently  Dominguez and its  subsidiaries  were also merged into
the Company (collectively,  the "merger"). The Company acquired in the Dominguez
merger  operations in the following  cities,  counties,  townships or localities
that Dominguez previously served:

         Bodfish               Kern County           Los Angeles County
         Carson                Kernville             Lucerne
         Compton               Lake Hughes           Mountain Shadows
         Duncans Mills         Lakeland              Onyx
         Fremont Valley        Lancaster             Squirrel Valley
         Guerneville           Leona Valley          Torrance
         Harbor City           Long Beach            Wofford Heights

Water  distribution  systems  were  constructed  and  service  furnished  to the
inhabitants of the localities currently known as Carson,  Compton,  Harbor City,
Long Beach and Torrance by various predecessors of the Company prior to 1911 and
the Company  believes  that it has a prior  right to operate in these  locations
which right was not extinguished by the incorporation of these cities subsequent
to 1911.  Except as noted below,  Dominguez has no franchises  from these cities
and has made no franchise payments to them and, to the Company's  knowledge,  no
question has ever been raised as to the right to make water  distribution and to
maintain all pipes and mains necessary therefor.

         As  to  the  remaining  localities,   Dominguez  has  received  written
franchise  agreements  which  are in full  force  and  effect  and has  paid all
franchise  fees to date,  with the  exception  of Compton and the City of Carson
Redevelopment Project #2, as to which the franchises expired without renewal in,
respectively,  1994 and 1998.  Dominguez  continued to provide water services to
Compton  and the City of  Carson  Redevelopment  Project  #2  subsequent  to the

                                     E-2-4
<PAGE>

expiration of the respective  franchises,  and to pay franchise fees, and to the
Company's  knowledge  no  question  has ever been raised as to the right to make
such distribution and to maintain all pipes and mains necessary therefor.

         10.  Condition  of Assets.  The  physical  assets of the Company are in
sound operating  condition,  there are no material arrears in the maintenance of
any such physical assets and the Company  believes that its sources of water are
adequate to meet its requirements for the foreseeable future.

         11. Pending Litigation, Proceedings. (a) There are no actions, suits or
proceedings  pending  at law or in equity or  before or by any  federal,  state,
municipal or other governmental department, commission, board, bureau, agency or
instrumentality,  domestic  or foreign,  or, to the  knowledge  of the  Company,
threatened  against or affecting the Company not adequately covered by insurance
or for  which  reserves  adequate  in  the  Company's  judgment  have  not  been
established  which  involve,  in  the  opinion  of  the  Company,  a  reasonable
possibility of judgments or liabilities  exceeding $500,000 in the aggregate net
of insurance, or which may, in the opinion of the Company result in any material
adverse change in the business or properties or in the  condition,  financial or
other, of the Company,  or the ability of the Company to perform its obligations
under the Sixth Supplement or the Series H Notes.

         (b) There  are no  proceedings  pending  or,  to the  knowledge  of the
Company,  threatened  against the  Company  before or by any  federal,  state or
municipal commission, board or other administrative agency, which materially and
adversely affect the water rates of the Company presently in effect.

         (c) The  Company is not in  default  with  respect to any order,  writ,
injunction  or  decree  of  any  court,  or  any  federal,  state  or  municipal
commission,  board or other  administrative  agency and the Company has complied
with all applicable statutes and regulations of the United States of America and
of any state,  municipality or agency of any thereof,  in respect of the conduct
of its business known or believed by the Company to be applicable  thereto,  the
failure to comply  with which  could  reasonably  be expected to have a material
adverse effect on the Company or its properties.

         12. No  Condemnation  Proceedings.  Since January 1, 1995, no elections
have  been  held  or  other  actions  taken   authorizing  the  commencement  of
proceedings for  condemnation of any of the properties of the Company.  However,
from time to time  there are  expressions  of  interest  made by public  bodies,
elected or appointed municipal officials,  persons seeking political position or
citizens groups urging acquisition of the Company's facilities in one or more of
the  communities  served by the  Company.  The Company does not believe that any
acquisition  by a city or  municipality  of its  properties by  condemnation  or
threat thereof would be adverse to the holders of the Series H Notes.

         13. No  Burdensome  Restrictions.  The  Company  is not  subject to any
burdensome corporate  restrictions in its Articles of Incorporation,  By-Laws or
otherwise, which materially and

                                     E-2-5
<PAGE>

adversely  affect  or in the  future  may (so far as the  Company  can  foresee)
materially and adversely affect the Company or its business,  property,  assets,
operations or condition, financial or other.

         14. Regulatory  Status,  Approval.  (a) The Company is not a registered
holding company or a subsidiary of a registered  holding company and the Company
is not  required to register  under the Public  Utility  Holding  Company Act of
1935, as amended. The Company is subject to the jurisdiction of the Commission.

         (b) No consent of, approval or authorization by, filing or registration
with, or notice to any  governmental  or public  authority or agency is required
for the  issuance,  sale or  delivery  of the  Series H Notes or the  execution,
delivery or performance of the Sixth Supplement, other than the authorization of
the Commission, which authorization has been duly obtained, is in full force and
effect and is not  subject to any appeal,  hearing,  rehearing  or contest.  All
conditions  contained in any such authorization which were to be fulfilled on or
prior to the issuance of the Series H Notes have been fulfilled. The Company has
furnished  to your special  counsel  true,  correct and complete  copies of said
authorization  and all  applications  heretofore  filed with or submitted to the
Commission in connection with its action to obtain said authorization.

         15. No Defaults,  Compliance with Other Instruments. The Company is not
in default under any outstanding  indentures,  contracts or agreements which are
material to the Company including,  without limitation,  the Mortgage Indenture;
and on the  Closing  Date there will not exist any  condition  which  would be a
default  under any such  indenture,  contract or  agreement.  The  execution and
delivery of the Sixth Supplement,  the consummation of the transactions  therein
provided for and compliance with the provisions of the Sixth  Supplement and the
Series H Notes by the  Company  will not  violate or result in any breach of the
terms,  conditions or provisions of, or constitute a default under, its Articles
of Incorporation,  By-Laws or any indenture,  mortgage, deed of trust, bank loan
or credit  agreement,  or other  material  agreement or  instrument to which the
Company  is a party or by which the  Company  may be  bound,  nor will such acts
result  in the  violation  of any  applicable  law,  rule,  regulation  or order
applicable  to the  Company  of  any  court  or  governmental  authority  having
jurisdiction  in the  premises  or in the  creation or  imposition  of any lien,
charge or encumbrance of any nature  whatsoever,  upon any property or assets of
the Company.

         16. Leases.  The Company has the right to, and does, enjoy peaceful and
undisturbed possession under all material leases to which it is a party or under
which it is operating.  All such leases are valid,  subsisting and in full force
and effect, and the Company is not in default under any thereof and no event has
occurred  and is  continuing,  and no  condition  exists  that,  after notice or
passage of time or both could become a material default under any such Lease.

         17. Use of Proceeds.  The Company will use the gross  proceeds  derived
from the sale of the  Series H Notes  under the Sixth  Supplement  to  refinance
existing  Indebtedness.  None  of the  transactions  contemplated  in the  Sixth
Supplement (including,  without limitation thereof, the use of the proceeds from
the sale of the Series H Notes) will violate or result in a violation of Section
7 of the Securities  Exchange Act of 1934, as amended, or any regulations issued
pursuant thereto,  including without  limitation,  Regulations U, T and X of the
Board of Governors of the Federal  Reserve  System,  12 C.F.R.,  Chapter II. The
Company  does not own or

                                     E-2-6
<PAGE>

intend to carry or  purchase  any  "margin  stock"  within  the  meaning of said
Regulation  U,  including  margin  stock  originally  issued by it.  None of the
proceeds  from the sale of the Series H Notes will be used to  purchase or carry
(or  refinance  any  borrowing  the  proceeds  of which were used to purchase or
carry) any margin stock.

         18. ERISA.  (a) The fair market value of all assets under all "employee
pension  benefit  plans" (as such term is  defined  in  Section  3(2) of ERISA),
maintained  by the  Company,  as from  time to time in  effect,  exceeded  as of
December 31, 2001, the last annual  valuation date, the actuarial  present value
of all benefits vested under the Plans by more than $10,898,000.

         (b) Neither any of the Plans nor any of the trusts created  thereunder,
nor  any  trustee  or  administrator  thereof,  has  engaged  in  a  "prohibited
transaction,"  as such term is defined in Section  4975 of the Code which  could
subject  the  Plans  or  any  of  them,  any  such  trust,  or  any  trustee  or
administrator  thereof,  or any disqualified person with respect to the Plans to
the tax or penalty on  prohibited  transactions  imposed by said  Section  4975,
except  that,  with  respect to any  actions  or  omissions  of  administrators,
trustees,  other fiduciaries,  parties in interest or disqualified persons of or
in respect to the Plans (other than  employees of the Company),  the Company has
no knowledge  that any of such persons has  committed a prohibited  transaction,
nor has the Company participated knowingly in or knowingly undertaken to conceal
a prohibited  transaction with or by any of such persons nor enabled any of them
to commit a prohibited transaction.

         (c)  Neither  any of the  Plans  subject  to Title IV of ERISA  nor any
trusts  related  to such  plans  have been  terminated,  nor have there been any
Reportable Events, as that term is defined in Section 4043 of ERISA (as modified
by the  regulations  thereunder),  in respect of those plans since the effective
date of ERISA.

         (d)  Neither any of the Plans which are subject to Section 302 of ERISA
nor any trusts  related to such plans have  incurred  any  "accumulated  funding
deficiency,"  as such  term is  defined  in said  Section  302  (whether  or not
waived), since the effective date of ERISA.

         (e) The  consummation  of the  transactions  provided  for in the Sixth
Supplement  and  compliance by the Company with the  provisions  thereof and the
Series H Notes issued  thereunder  will not involve any  prohibited  transaction
within the meaning of ERISA or Section 4975 of the Code.

         19. Taxes. All Federal,  state and local taxes and assessments due from
the Company have been (a) fully paid or adequately  provided for on the books of
the Company in accordance with generally accepted  accounting  principles or (b)
are being contested in good faith by the Company.  There has been no examination
of the Federal income tax returns of the Company by the Internal Revenue Service
subsequent to the examinations of the returns for tax years 1984-1991.

         20. Compliance with Laws. To the best of the Company's knowledge, after
due inquiry, the Company is in compliance with all applicable Federal, state, or
local laws, statutes, rules, regulations or ordinances relating to public heath,
safety or the environment,  including, without

                                     E-2-7
<PAGE>

limitation,  relating to  releases,  discharges,  emissions or disposals to air,
water,  land or ground water,  to the withdrawal or use of ground water,  to the
use, handling or disposal of polychlorinated biphenyls (PCB's), asbestos or urea
formaldehyde,  to the  treatment,  storage,  disposal or management of hazardous
substances   (including,   without  limitation,   petroleum,   its  derivatives,
by-products or other hydrocarbons), and to exposure to hazardous substances, the
failure to comply  with which  could  reasonably  be expected to have a material
adverse  effect on the Company or its  properties.  Except as  disclosed  in the
"Environmental  Matters" section of Item 1 of the CWSG 10-K, the  "Environmental
Matters"  section of CWSG's  2001  Annual  Report  and the  "Legal  Proceedings"
section  of Item 3 of the CWSG  10-K  with  respect  to  matters  in  Chico  and
Marysville,  California,  the  Company  does  not know of any  liability  of the
Company  under  the  Comprehensive  Environmental  Response,   Compensation  and
Liability   Act  of  1980,   as  amended  by  the   Superfund   Amendments   and
Reauthorization Act of 1986 (42 U.S.C. Section 9601 et seq.) with respect to any
property now or heretofore owned or leased by the Company.

         21. Full Disclosure.  The financial statements referred to in the Sixth
Supplement do not, nor does the Sixth Supplement, the Company Information or any
written statement  (including without limitation the 2001 Company Report and the
2001  CWSG  Report)  furnished  by the  Company  to you in  connection  with the
negotiation of the sale of the Series H Notes, contain any untrue statement of a
material fact or, taken  together,  omit a material  fact  necessary to make the
statements  contained  therein or herein not misleading.  There is no fact which
the  Company  has not  disclosed  to you in  writing  which  materially  affects
adversely  nor, so far as the Company can now foresee,  will  materially  affect
adversely the properties,  business,  prospects, profits or condition (financial
or  otherwise)  of the  Company  or the  ability of the  Company to perform  its
obligations  under the Note  Agreement,  the Sixth  Supplement  or the  Series H
Notes.

         22. Private Offering.  Neither the Company, directly or indirectly, nor
any agent on its  behalf  has  offered  or will  offer the Series H Notes or any
similar Security or has solicited or will solicit an offer to acquire the Series
H Notes or any similar  Security from or has otherwise  approached or negotiated
or will  approach or  negotiate  in respect of the Series H Notes or any similar
Security  with any Person  other than the  Purchasers  and not more than 6 other
institutional  investors,  each of whom was  offered a portion  of the  Series H
Notes  at  private  sale  for  investment.  Neither  the  Company,  directly  or
indirectly,  nor any agent on its behalf has  offered or will offer the Series H
Notes or any  similar  Security  or has  solicited  or will  solicit an offer to
acquire  the  Series H Notes or any  similar  Security  from any Person so as to
cause the  issuance  and sale of the  Series H Notes  not to be exempt  from the
provisions of Section 5 of the Securities Act of 1933, as amended.

                                     E-2-8
<PAGE>


                CURRENT DEBT, FUNDED DEBT AND CAPITALIZED LEASES
                            AS OF SEPTEMBER 30, 2002

         1.       Current Debt

                  $11,000,000 borrowed under the Company's bank short-term line
                  of credit with Bank of America.

         2.       Funded Debt

                  $111,865,000 outstanding under the Company's various series of
                  First Mortgage Bonds with due dates ranging from 2002 to 2023.

                  $4,000,000  First Mortgage Bonds,  Series J due 2023 (formerly
                  Dominguez Water Company)

                  $5,000,000  First Mortgage Bonds,  Series K due 2012 (formerly
                  Dominguez Water Company)

                  $20,000,000 Series A Senior Notes due November 1, 2025.

                  $20,000,000 Series B Senior Notes due November 1, 2028.

                  $20,000,000 Series C Senior Notes due November 1, 2030.

                  $20,000,000 Series D Senior Notes due November 1, 2031.

                  $20,000,000 Series E Senior Notes due May 1, 2032.

                  $20,000,000 Series F Senior Notes due November 1, 2017.

                  $2,725,000  California  Department  of Water  Resources  Loans
                  maturing 2011 to 2032.

                  $459,000 obligations due on water system acquisitions.

         3.       Capitalized Leases

                  None.

                                     ANNEX A
                                 (to Exhibit 2)

<PAGE>

                         MATERIAL WATER SUPPLY CONTRACTS

1.       Water  Supply  Contract  between  the  Company  and the County of Butte
         relating to the Company's Oroville District.

2.       Water Supply Contract  between the Company and Kern County Water Agency
         relating to the Company's Bakersfield District.

3.       Water  Supply  Contract  between the Company  and  Stockton  East Water
         District relating to the Company's Stockton District.

4.       Amended  Contract  between the Company and Stockton East Water District
         relating to the Company's Stockton District.

5.       Settlement  Agreement and Master Water Sales Contract  between the City
         and County of San Francisco and Certain Suburban Purchasers.

6.       Supplement  to  Settlement  Agreement  and Master Water Sales  Contract
         between the Company and the City and County of San  Francisco  relating
         to the Company's Bear Gulch District.

7.       Supplement  to  Settlement  Agreement  and Master Water Sales  Contract
         between the Company and the City and County of San  Francisco  relating
         to the Company's San Carlos District.

8.       Supplement  to  Settlement  Agreement  and Master Water Sales  Contract
         between the Company and the City and County of San  Francisco  relating
         to the Company's San Mateo District.

9.       Supplement  to  Settlement  Agreement  and Master Water Sales  Contract
         between the Company and the City and County of San  Francisco  relating
         to the Company's South San Francisco District.

10.      Water Supply Contract  between the Company and Santa Clara Valley Water
         District relating to the Company's Los Altos District.

11.      Water Supply Contract  between the Company and Pacific Gas and Electric
         Company related to the Company's Oroville District.

12.      Water  Supply  Contract  between the Company and Alameda  County  Flood
         Control  and  Water  Conservation  District  related  to the  Company's
         Livermore District.

13.      Water Supply Contract  between the Company,  ARCO Products  Company and
         West Basin Municipal Water District relating to recycled water.


                                     ANNEX B
                                 (to Exhibit 2)

<PAGE>


                         DESCRIPTION OF CLOSING OPINION
                            OF COUNSEL TO THE COMPANY

         The closing opinion of Bingham  McCutchen LLP, counsel for the Company,
which is called for by Section 5(a)(iii) of the Sixth Supplement, shall be dated
the Closing Date and addressed to the Purchasers, shall be satisfactory in scope
and form to the Purchasers and shall be to the effect that:

                  1. The Company is a  corporation  duly  incorporated,  validly
         existing and in corporate good standing under the laws of California.

                  2. The  execution  and  delivery  by the  Company  of the Note
         Agreement,  the Sixth  Supplement and the Notes, and the performance by
         the  Company of its  obligations  under the Note  Agreement,  the Sixth
         Supplement and the Notes, are within the Company's corporate powers and
         have been duly authorized by all requisite corporate action on the part
         of the Company.  The Company has duly  executed and  delivered the Note
         Agreement, the Sixth Supplement and the Notes.

                  3. Each of the Note  Agreement,  the Sixth  Supplement and the
         Notes  constitutes  a  valid  and  binding  agreement  of the  Company,
         enforceable  against the Company in accordance with its terms. Based on
         Section 1646.5 of the California  Civil Code, a California  state court
         and a Federal court which applies the law of the State of California to
         the Note Agreement,  the Sixth Supplement and the Notes would recognize
         and give effect to the choice of law  provisions  set forth in the Note
         Agreement, the Sixth Supplement and the Notes.

                  4. The  execution  and  delivery  by the  Company  of the Note
         Documents,  and compliance by the Company with the  provisions  thereof
         (i) will  not,  to the best of our  knowledge,  result  in a breach  or
         default  (or give rise to any  right of  termination,  cancellation  or
         acceleration)  under the  Articles of  Incorporation  or By-Laws of the
         Company,  or the Mortgage  Indenture,  the Credit Agreement dated as of
         July  31,   2001,   between   the   Company  and  Bank  of  America  as
         Administrative  Agent,  or any  agreement or other  instrument  that is
         listed as a material  contract in CWSG's Annual Report on Form 10-K for
         the year ended  December 31,  2001.  To the best of our  knowledge,  no
         consent or approval  by, or any  notification  of or filing  with,  any
         court,  public body or authority of the State of California is required
         to be  obtained  or  effected  by the  Company in  connection  with the
         execution,  delivery  and  performance  by  the  Company  of  the  Note
         Documents  or the  issuance  or  sale  of the  Notes,  except  for  the
         authorization  of the  Commission,  which  authorization  has been duly
         obtained and is in full force and effect.

                  5.  Based upon the  representations  set forth in Section 6 of
         the Sixth  Supplement,  the accuracy of which we have not independently
         verified or investigated,  the issuance, sale and delivery of the Notes
         under the  circumstances  contemplated by the Sixth  Supplement do not,
         under  existing law,  require the  registration  of the Notes under the
         Securities Act of 1933, as amended,  or the  qualification of the Sixth
         Supplement  or an indenture  under the Trust  Indenture Act of 1939, as
         amended.

                                    EXHIBIT 3
                                 (to Supplement)
<PAGE>

                  6. Based upon the  assumption  of the accuracy of  information
         obtained  by the  Company  from  sources  believed by the Company to be
         reliable (a) that the  following  cities served by the Company were all
         incorporated prior to 1911:

                 Bakersfield         Marysville             South San Francisco
                 Chico               Oroville               Stockton
                 Dixon               Redondo Beach          Visalia
                 Hermosa Beach       Salinas                Willows
                 King City           San Mateo
                 Livermore           Selma

                  (b) that  water  distribution  systems  were  constructed  and
service  furnished to the  inhabitants  of each by various  predecessors  of the
Company prior to 1911; and

                  (c) that there were no public water works owned or  controlled
by the municipality in any of them prior to 1911;

                         in our opinion,

                           (i) the Company has a  "constitutional"  franchise in
         each of the above cities and under such "constitutional"  franchise has
         a perpetual  right which was not  repealed by the repeal of Article XI,
         Section 19, of the California Constitution to continue to occupy public
         streets  of each of said  cities  with  pipes and mains and to lay down
         additional  pipes and mains in said streets for the supplying of water,
         subject to reasonable regulation by the respective municipalities;

                           (ii) this  right is not  limited  to streets in which
         pipes or mains  were  laid  prior to 1911 but  extends  at least to all
         streets  in the  said  municipalities  as they  existed  at the date of
         repeal of the constitutional provision in 1911; and

                           (iii) the right  probably  also  extends to territory
         annexed  into each  respective  city after such repeal,  although  this
         latter  question  is not  entirely  free from doubt in the absence of a
         final decision of the courts thereon.

                  7.   Dominguez   Services    Corporation   (along   with   its
         subsidiaries,  "Dominguez")  was merged into the Company  effective May
         25, 2000 and  Dominguez  Water Company was also merged into the Company
         effective  October 12,  2000.  In the  Dominguez  mergers,  the Company
         acquired the operations of Dominguez,  which to our knowledge  included
         service to the following cities, counties, townships or localities:

                   Bodfish              Kernville             Mountain Shadows
                   Carson               Lake Hughes           Onyx
                   Compton              Lakeland              Torrance
                   Duncans Mills        Lancaster             Squirrel Valley
                   Fremont Valley       Leona Valley          Wofford Heights
                   Guerneville          Long Beach            Los Angeles County
                   Harbor City          Lucerne               Kern County

                                     E-3-2
<PAGE>

                  8. We note that the Officers'  Certificates state that: (a) to
         the Company's  knowledge,  water distribution  systems were constructed
         and service  furnished to the  inhabitants of the localities  currently
         known as Carson,  Compton,  Harbor  City,  Long Beach and  Torrance  by
         various  predecessors  of the  Company  prior to 1911;  (b) the Company
         believes that it has a prior right to operate in these  locations which
         right  was  not  extinguished  by the  incorporation  of  these  cities
         subsequent  to 1911;  (c)  except  as  noted  below,  to the  Company's
         knowledge Dominguez has no franchises from these cities and has made no
         franchise  payments to them;  and (d) to the  Company's  knowledge,  no
         question   has  ever  been  raised  as  to  the  right  to  make  water
         distribution and to maintain all pipes and mains necessary therefor.

                  9. We note that the Officers'  Certificates state that: (a) as
         to the  remaining  localities  listed in paragraph 7, to the  Company's
         knowledge,  Dominguez has received written  franchise  agreements which
         are in full force and effect and has paid all  franchise  fees to date,
         with the  exception  of  Compton  and the City of Carson  Redevelopment
         Project  #2, as to which the  franchises  expired  without  renewal in,
         respectively,  1994 and 1998; (b) to the Company's knowledge, Dominguez
         continued to provide  water  services to Compton and the City of Carson
         Redevelopment Project #2 subsequent to the expiration of the respective
         franchises,  and to  pay  franchise  fees;  and  (c)  to the  Company's
         knowledge,  no  question  has ever been  raised as to the right to make
         such  distribution  and to  maintain  all  pipes  and  mains  necessary
         therefor.

         The opinion of Bingham  McCutchen  LLP shall  cover such other  matters
relating  to the sale of the  Series H Notes as the  Purchasers  may  reasonably
request and shall  provide  that  Chapman and Cutler in  delivering  its opinion
under the Note Agreement may rely on the opinion of Bingham  McCutchen LLP as to
matters of California law. With respect to matters of fact on which such opinion
is based, such counsel shall be entitled to rely on appropriate  certificates of
public officials and officers of the Company.

                                     E-3-3
<PAGE>

                DESCRIPTION OF SPECIAL COUNSEL'S CLOSING OPINION

         The  closing  opinion of Chapman  and  Cutler,  special  counsel to the
Purchasers,  called for by Section 5(a)(iii) of the Sixth  Supplement,  shall be
dated the Closing Date and addressed to the Purchasers, shall be satisfactory in
form and substance to the Purchasers and shall be to the effect that:

                  1. The Company is a corporation,  validly existing and in good
         standing  under  the  laws  of the  State  of  California  and  has the
         corporate power and the corporate  authority to execute and deliver the
         Sixth Supplement and to issue the Series H Notes.

                  2. The Note Agreement and the Sixth  Supplement have been duly
         authorized  by  all  necessary  corporate  action  on the  part  of the
         Company,  have been duly  executed  and  delivered  by the  Company and
         constitute  the  legal,  valid  and  binding  contract  of the  Company
         enforceable  in  accordance  with its  terms,  subject  to  bankruptcy,
         insolvency, fraudulent conveyance and similar laws affecting creditors'
         rights  generally,  and general  principles  of equity  (regardless  of
         whether  the   application  of  such  principles  is  considered  in  a
         proceeding in equity or at law).

                  3.  The  Series  H Notes  have  been  duly  authorized  by all
         necessary  corporate action on the part of the Company,  have been duly
         executed and delivered by the Company and constitute  the legal,  valid
         and binding  obligations of the Company  enforceable in accordance with
         their terms, subject to bankruptcy,  insolvency,  fraudulent conveyance
         and similar laws affecting  creditors'  rights  generally,  and general
         principles of equity  (regardless  of whether the  application  of such
         principles is considered in a proceeding in equity or at law).

                  4. The issuance, sale and delivery of the Series H Notes under
         the  circumstances  contemplated by the Sixth  Supplement do not, under
         existing law,  require the registration of the Series H Notes under the
         Securities  Act  of  1933,  as  amended,  or  the  qualification  of an
         indenture under the Trust Indenture Act of 1939, as amended.

         The  opinion of Chapman and Cutler may rely upon the opinion of Bingham
McCutchen LLP as to matters of California law. The opinion of Chapman and Cutler
shall also state that the opinion of Bingham  McCutchen LLP is  satisfactory  in
scope and form to Chapman and Cutler and that, in their opinion,  the Purchasers
are justified in relying thereon.

         In rendering  the opinion set forth in  paragraph 1 above,  Chapman and
Cutler may rely,  as to matters  referred  to in  paragraph  1,  solely  upon an
examination of the Articles of Incorporation  certified by, and a certificate of
good  standing  of the  Company  from,  the  Secretary  of State of the State of
California,  the By-laws of the Company and the general business corporation law
of the State of California.

         With  respect to  matters  of fact upon  which  such  opinion is based,
Chapman and Cutler may rely on appropriate  certificates of public officials and
officers  of the  Company  and  upon  representations  of the  Company  and  the
Purchasers  delivered in  connection  with the issuance and sale of the Series H
Notes.

                                    EXHIBIT 4
                                 (to Supplement)