UNLESS THIS  CERTIFICATE  IS PRESENTED BY AN  AUTHORIZED  REPRESENTATIVE  OF THE
DEPOSITORY  TRUST COMPANY,  A NEW YORK  CORPORATION  ("DTC"),  TO ARIZONA PUBLIC
SERVICE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT,
AND ANY  CERTIFICATE  ISSUED IS  REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER  NAME AS IS  REQUESTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC (AND ANY
PAYMENT  IS MADE TO CEDE & CO. OR TO SUCH  OTHER  ENTITY AS IS  REQUESTED  BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR
VALUE OR  OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  INASMUCH AS THE  REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                         ARIZONA PUBLIC SERVICE COMPANY

                              6 1/4% Note Due 2005

No.  1                                                              $100,000,000
   -----                                                     CUSIP No. 040555BV5

         Arizona  Public  Service  Company,  a  corporation  duly  organized and
existing  under the laws of Arizona  (herein  called the  "Company",  which term
includes any successor Person under the Indenture  hereinafter referred to), for
value received, hereby promises to pay to Cede & Co., or registered assigns, the
principal  sum of One Hundred  Million  Dollars on January 15, 2005,  and to pay
interest  thereon from January 16, 1998 or from the most recent Interest Payment
Date to which  interest has been paid or duly  provided  for,  semi-annually  on
January 15 and July 15 in each year,  commencing July 15, 1998, at the rate of 6
1/4% per  annum,  until  the  principal  hereof  is paid or made  available  for
payment.  The interest so payable,  and punctually paid or duly provided for, on
any Interest  Payment Date will, as provided in such  Indenture,  be paid to the
Person in whose name this Security (or one or more  Predecessor  Securities)  is
registered  at the  close  of  business  on the  Regular  Record  Date  for such
interest,  which  shall be the  January 1 or July 1  (whether  or not a Business
Day), as the case may be, next  preceding  such Interest  Payment Date. Any such
interest not so punctually  paid or duly provided for will forthwith cease to be
payable to the Holder on such Regular  Record Date and may either be paid to the
Person in whose name this Security (or one or more  Predecessor  Securities)  is
registered at the close of business on a Special  Record Date for the payment of
such  Defaulted  Interest to be fixed by the Trustee,  notice  whereof  shall be
given to Holders  of  Securities  of this  series not less than 10 days prior to
such Special  Record Date, or be paid at any time in any other lawful manner not
inconsistent  with the  requirements  of any  securities  exchange  on which the
Securities of this series may be listed, and upon such notice as may be required
by such exchange, all as more fully provided in said Indenture.

         Payment of the principal of (and  premium,  if any) and any interest on
this Security will be made at the office or agency of the Company maintained for
that  purpose in The City of New York,  in such coin or  currency  of the United
States of  America as at the time of  payment  is legal  tender  for  payment of
public and private debts; provided, however, that at the option of the

Company  payment of interest  may be made by check  mailed to the address of the
Person entitled thereto as such address shall appear in the Security Register.

         Reference is hereby made to the further provisions of this Security set
forth on the reverse  hereof,  which further  provisions  shall for all purposes
have the same effect as if set forth at this place.

         Unless the  certificate of  authentication  hereon has been executed by
the Trustee referred to on the reverse hereof by manual signature, this Security
shall  not be  entitled  to any  benefit  under  the  Indenture  or be  valid or
obligatory for any purpose.
                                        2

         IN WITNESS  WHEREOF,  the Company has caused this instrument to be duly
executed under its corporate seal.

                                            ARIZONA PUBLIC SERVICE COMPANY


                                            By    George A. Schreiber, Jr.
                                              ----------------------------------
                                              Executive Vice President
                                              and Chief Financial Officer

Attest:

     Nancy C. Loftin
- -------------------------------------
Vice President, Chief Legal Counsel
and Secretary
                                        3

         This  Security is one of a duly  authorized  issue of securities of the
Company (herein called the "Securities"), issued and to be issued in one or more
series  under an  Indenture,  dated as of January  15, 1998  (herein  called the
"Indenture",  which  term  shall  have  the  meaning  assigned  to  it  in  such
instrument),  between  the  Company  and The Chase  Manhattan  Bank,  as Trustee
(herein  called the "Trustee",  which term includes any successor  trustee under
the Indenture), and reference is hereby made to the Indenture for a statement of
the respective rights,  limitations of rights,  duties and immunities thereunder
of the Company,  the Trustee and the Holders of the  Securities and of the terms
upon which the Securities are, and are to be, authenticated and delivered.  This
Security  is  one of the  series  designated  on the  face  hereof,  limited  in
aggregate principal amount to $100,000,000.

         The  Securities of this series are subject to redemption  upon not less
than 30 days' notice by mail at any time at the option of the Company,  in whole
or from time to time in part, at a redemption  price equal to the sum of (i) the
principal  amount of the  Securities  (or portion  thereof)  being redeemed plus
accrued interest  thereon to the redemption date and (ii) the Make-Whole  Amount
(as defined below),  if any, with respect to the Securities  being redeemed (the
"Redemption Price") .

         If notice has been given as provided in the Indenture and funds for the
redemption of any  Securities  (or any portion  thereof)  called for  redemption
shall  have been made  available  on the  redemption  date  referred  to in such
notice,  such Securities (or any portion thereof) will cease to bear interest on
the date fixed for such  redemption  specified in such notice and the only right
of the Holders of such  Securities  will be to receive payment of the Redemption
Price.

         Notice of any optional  redemption of Securities of this series (or any
portion  thereof) will be given to Holders at their  addresses,  as shown in the
Security  Register for such  Securities,  not more than 60 nor less than 30 days
prior to the date fixed for  redemption.  The notice of redemption will specify,
among other items,  the  Redemption  Price or, if not then known,  the manner of
calculation  thereof,  and the principal  amount of the Securities  held by such
Holder to be redeemed.  If less than all of the Securities are to be redeemed at
the option of the Company,  the Trustee shall select, in such manner as it shall
deem fair and  appropriate,  the  portion of such  Securities  to be redeemed in
whole or in part.

         As used herein:

         "Make-Whole  Amount" means, in connection with any optional  redemption
of any  Securities  of this  series,  the  excess,  if any,  of (i) the sum,  as
determined by a Quotation  Agent (as defined  herein),  of the present values of
the principal  amount of such  Securities,  together with scheduled  payments of
interest  (exclusive of interest to the date of redemption)  from the redemption
date  to the  Maturity  of  such  Securities,  in each  case  discounted  to the
redemption  date on a semi-annual  basis  (assuming a 360-day year consisting of
twelve 30-day months) at the
                                        4

Adjusted  Treasury  Rate (as  defined  herein)  over (ii) 100% of the  principal
amount of the Securities of this series to be redeemed.

         "Adjusted  Treasury Rate" means,  with respect to any redemption  date,
the rate per annum equal to the semi-annual  equivalent yield to maturity of the
Comparable Treasury Issue,  calculated using a price for the Comparable Treasury
Issue  (expressed  as a  percentage  of  its  principal  amount)  equal  to  the
Comparable  Treasury  Price for such  redemption  date,  calculated on the third
Business Day preceding the  redemption  date,  plus in each case 0.15% (15 basis
points).

         "Comparable  Treasury Issue" means the United States Treasury  security
selected by the Quotation Agent as having a maturity comparable to the remaining
term from the  redemption  date to the Maturity of the Securities of this series
that  would  be  utilized,  at the  time of  selection  and in  accordance  with
customary financial practice, in pricing new issues of corporate debt securities
of comparable maturity to the remaining term of the Securities of this series.

         "Quotation  Agent" means the Reference  Treasury Dealer selected by the
Trustee after consultation with the Company. "Reference Treasury Dealer" means a
primary U.S. Government securities dealer selected by the Company.

         "Comparable Treasury Price" means, with respect to any redemption date,
(i) the average of the bid and asked prices for the  Comparable  Treasury  Issue
(expressed in each case as a percentage  of its  principal  amount) on the third
Business  Day  preceding  such  redemption  date,  as set  forth  in  the  daily
statistical  release (or any successor release) published by the Federal Reserve
Bank of New  York  and  designated  "Composite  3:30  p.m.  Quotations  for U.S.
Government Securities" or (ii) if such release (or any successor release) is not
published or does not contain such prices on such  Business  Day, the average of
three (or such lesser number as is obtained by the Trustee)  Reference  Treasury
Dealer Quotations for such redemption date.

         "Reference  Treasury  Dealer  Quotations"  means,  with respect to each
Reference Treasury Dealer and any redemption date, the average, as determined by
the  Trustee,  of the bid and asked  prices for the  Comparable  Treasury  Issue
(expressed  in each case as a  percentage  of its  principal  amount)  quoted in
writing to the Trustee by such Reference  Treasury Dealer at 5:00 p.m., New York
City time, on the third Business Day preceding such redemption date.

         The Securities of this series will not be subject to any sinking fund.

         In the  event  of  redemption  of this  Security  in part  only,  a new
Security  or  Securities  of this  series and of like  tenor for the  unredeemed
portion  hereof  will be  issued  in the  name of the  Holder  hereof  upon  the
cancellation hereof.

         The Indenture  contains  provisions  for  defeasance at any time of the
entire indebtedness of this Security or certain restrictive covenants and Events
of Default  with respect to this  Security,  in each case upon  compliance  with
certain conditions set forth in the Indenture.
                                        5

         If an Event of Default with respect to  Securities of this series shall
occur and be  continuing,  the principal of the Securities of this series may be
declared  due and  payable in the manner  and with the  effect  provided  in the
Indenture.

         The Indenture permits, with certain exceptions as therein provided, the
amendment  thereof and the  modification  of the rights and  obligations  of the
Company  and the rights of the  Holders of the  Securities  of each series to be
affected under the Indenture at any time by the Company and the Trustee with the
consent of the Holders of 662/3% in principal  amount of the  Securities  at the
time  Outstanding  of each series to be affected.  The  Indenture  also contains
provisions  permitting the Holders of specified  percentages in principal amount
of the  Securities  of each  series  at the time  Outstanding,  on behalf of the
Holders of all  Securities  of such series,  to waive  compliance by the Company
with certain  provisions of the  Indenture  and certain past defaults  under the
Indenture  and their  consequences.  Any such consent or waiver by the Holder of
this  Security  shall be  conclusive  and binding  upon such Holder and upon all
future Holders of this Security and of any Security issued upon the registration
of transfer  hereof or in  exchange  herefor or in lieu  hereof,  whether or not
notation of such consent or waiver is made upon this Security.

         As provided  in and subject to the  provisions  of the  Indenture,  the
Holder of this  Security  shall not have the right to institute  any  proceeding
with respect to the Indenture or for the appointment of a receiver or trustee or
for any other remedy thereunder,  unless such Holder shall have previously given
the Trustee written notice of a continuing  Event of Default with respect to the
Securities of this series,  the Holders of not less than 25% in principal amount
of the Securities of this series at the time Outstanding shall have made written
request to the  Trustee  to  institute  proceedings  in respect of such Event of
Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee
shall not have  received  from the Holders of a majority in principal  amount of
Securities of this series at the time Outstanding a direction  inconsistent with
such  request,  and shall have failed to institute any such  proceeding,  for 60
days after receipt of such notice, request and offer of indemnity. The foregoing
shall not apply to any suit  instituted  by the Holder of this  Security for the
enforcement of any payment of principal hereof or any premium or interest hereon
on or after the respective due dates expressed herein.

         No reference  herein to the Indenture and no provision of this Security
or of the Indenture  shall alter or impair the obligation of the Company,  which
is  absolute  and  unconditional,  to pay the  principal  of and any premium and
interest  on this  Security  at the  times,  place and rate,  and in the coin or
currency, herein prescribed.

         As provided in the Indenture and subject to certain limitations therein
set  forth,  the  transfer  of this  Security  is  registrable  in the  Security
Register,  upon surrender of this Security for  registration  of transfer at the
office or agency of the  Company  in any place  where the  principal  of and any
premium  and  interest  on this  Security  are  payable,  duly  endorsed  by, or
accompanied  by a written  instrument  of transfer in form  satisfactory  to the
Company and the Security  Registrar  duly  executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or
                                        6

more  new   Securities  of  this  series  and  of  like  tenor,   of  authorized
denominations and for the same aggregate principal amount, will be issued to the
designated transferee or transferees.

         The  Securities  of this series are issuable  only in  registered  form
without coupons in denominations of $1,000 and any integral multiple thereof. As
provided in the Indenture and subject to certain  limitations therein set forth,
Securities of this series are exchangeable for a like aggregate principal amount
of  Securities  of this  series  and of like  tenor  of a  different  authorized
denomination, as requested by the Holder surrendering the same.

         No service charge shall be made for any such  registration  of transfer
or exchange,  but the Company may require  payment of a sum  sufficient to cover
any tax or other governmental charge payable in connection therewith.

         Prior to due presentment of this Security for registration of transfer,
the  Company,  the Trustee and any agent of the Company or the Trustee may treat
the Person in whose name this Security is registered as the owner hereof for all
purposes,  whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

         All terms used in this  Security  which are  defined  in the  Indenture
shall have the meanings assigned to them in the Indenture.
                                        7

                          CERTIFICATE OF AUTHENTICATION

         This is one of the Securities of the series designated therein referred
to in the within-mentioned Indenture.

                                                        THE CHASE MANHATTAN BANK
                                                                      As Trustee


January 16, 1998                                        By    T. J. Foley
- ----------------                                          ----------------------
     Dated                                                    Authorized Officer
                                        8