Exhibit 15.1





November 17, 1995



Arizona Public Service Company
Post Office Box 53999
Phoenix, Arizona 85072-3999

We have made a review, in accordance with standards  established by the American
Institute of Certified Public  Accountants,  of the unaudited  interim financial
information of Arizona  Public  Service  Company for the periods ended March 31,
June 30 and  September  30, 1995 and 1994, as indicated in our reports dated May
8, August 8, and November 2, 1995,  respectively;  because we did not perform an
audit, we expressed no opinion on that information.

We are aware that our  reports  referred  to above,  which are  included in your
Quarterly  Reports on Form 10-Q for the quarters ended March 31, 1995,  June 30,
1995, and September 30, 1995 are incorporated by reference in this  Registration
Statement.

We are also aware that the aforementioned  reports pursuant to Rule 436(c) under
the  Securities  Act of  1933,  are not  considered  a part of the  Registration
Statement  prepared  or  certified  by an  accountant  or a report  prepared  or
certified by an accountant within the meaning of Sections 7 and 11 of the Act.



DELOITTE & TOUCHE LLP
DELOITTE & TOUCHE LLP
Phoenix, Arizona