Arizona Public Service 10-Q2008 Q1 Quarterly report

Filed: 8 May 08, 12:00am

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New words: AAA, actuarial, add, Ambac, antidilutive, approach, assigned, auction, basic, book, budget, CAMR, Canadian, carbon, Clause, comment, commitment, Congressional, conservation, country, creation, curtailing, defray, discretion, diverse, enacted, endanger, erosion, fee, fit, focused, geothermal, Gila, grid, health, hierarchy, identical, inflationary, issuable, judgment, lesser, lowest, manner, mentioned, mercury, MercuryOn, mortgage, motor, observable, organization, overturned, peak, percentage, phase, phased, placement, ProceedingsOur, promotion, quoted, recurring, regime, Registry, Reservation, reset, satisfy, solar, southwestern, submission, sufficient, TCA, timeline, transparent, trial, unable, undertaken, underway, unobservable, uranium, vacate, vacated, vesting, voluntarily, weak, website, week, welfare, whichever, withheld, withholding, workplace, Yucca, Yuma

Removed: absorb, acquired, affirming, alleged, alter, altered, amend, annually, appellate, applying, audit, authorization, began, buy, cap, capacity, Club, conduct, conducted, conform, continuing, correct, correctly, coupled, deferral, denied, diesel, disallowance, driven, dust, earlier, electrical, emergency, essentially, fundamental, group, ii, incorporation, incurrence, injection, intended, involving, issuance, justified, large, light, longer, low, matched, matching, moderate, modifying, monitored, moratorium, MWh, nature, noted, optional, overpayment, Overview, Paso, point, preferred, presenting, ProceedingsThe, profit, prospective, prudence, pursue, reallocate, reclassify, recognize, recognized, recommended, recoverable, refunded, regimen, remand, retain, retained, routine, safety, settled, sharing, Sierra, situation, slowdown, stay, stayed, strong, structured, subsequent, suspended, taxing, transfer, true, uncertain, uncertainty, unchanged, unplanned, unrecovered, unregulated, vary, white, work, yellow

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Exhibit 32.1

CERTIFICATION
OF
CHIEF EXECUTIVE OFFICER
AND
PRINCIPAL FINANCIAL OFFICER
PURSUANT TO 18 U.S.C. 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, William J. Post, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report on Form 10-Q of Pinnacle West Capital Corporation for the fiscal quarter ended March 31, 2008, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of Pinnacle West Capital Corporation.

Date: May 8, 2008.



	/s/ William J. Post
	William J. Post
	Chairman and Chief Executive Officer

I, Donald E. Brandt, certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report on Form 10-Q of Pinnacle West Capital Corporation for the fiscal quarter ended March 31, 2008 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of Pinnacle West Capital Corporation.

Date: May 8, 2008.



	/s/ Donald E. Brandt
	Donald E. Brandt
	President, Chief Operating Officer and Principal Financial Officer