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EXHIBIT 15
October 25, 2007
Securities and Exchange Commission
100 F Street, NE
Washington, D.C. 20549
RE: Alcoa Inc.
Commissioners:
We are aware that our report dated October 25, 2007, on our review of interim financial information of Alcoa Inc. and its subsidiaries (Alcoa) for the three and nine-month periods ended September 30, 2007 and 2006 and included in Alcoa’s quarterly report on Form 10-Q for the quarter ended September 30, 2007 is incorporated by reference in its Registration Statements on Form S-8 (Nos. 33-24846, 333-32516, 333-106411, 33-22346, 33-49109, 33-60305, 333-27903, 333-62663, 333-79575, 333-36208, 333-37740, 333-39708, 333-115717, 333-128445, and 333-146330), Form S-3 (No. 333-74874), and Form S-4 (No. 333-141419).
Very truly yours,
/s/ PricewaterhouseCoopers LLP |
Pittsburgh, Pennsylvania |