NEW YORK, August 6, 2007 — The Bank of New York Mellon, the global leader in securities servicing, has been selected by Inversiones Aguas Metropolitanas S.A (IAM) as the depositary bank for its Level I American depositary receipt (ADR) program. Under the Level I program, each IAM ADR represents 20 common shares of the company. The Level I ADRs will trade on the Over-the-Counter market (OTC) under the ticker symbol "IAMTY." The common shares trade on the Santiago Stock Exchange under the symbol "IAM."

Marta Colet, chief executive officer of IAM, said, "The establishment of a Level I ADR program reinforces our company's commitment to providing our shareholders with an efficient and cost effective investment vehicle. This upgrade to an unrestricted facility gives us the opportunity to expand our equity presence throughout the global capital markets and provides access to IAM shares to a broad universe of U.S. and global investors."

Christopher Sturdy, executive vice president and head of The Bank of New York Mellon's Depositary Receipt Division, said, "We are delighted that IAM has decided to broaden its relationship with us. As the leading depositary bank, we have the expertise and experience it takes to guide clients through the process of upgrading and expanding the scope of their DR programs."

Inversiones Aguas Metropolitanas, through its 50.1% shareholding on Aguas Andinas and subsidiaries, is the largest sanitation group in Chile and one of the largest private-sector companies in this business in Latin America. The company provides sanitation services to almost 6 million inhabitants in the Santiago Metropolitan Region, with services that cover the whole water cycle, involving abstraction, production and distribution of drinking water and collection, treatment and final disposal of wastewater, for residential, industrial and commercial customers. IAM's strategic partner and controlling shareholder is the Agbar Group, the principal Spanish private-sector company for supplying water to households, with 140 years in the sector and with more than 23 million inhabitants served worldwide.

The Bank of New York Mellon's Depositary Receipt business is conducted through The Bank of New York subsidiary, which acts as depositary for more than 1,270 American and global depositary receipt programs, acting in partnership with leading companies from 60 countries. With an unrivalled commitment to helping securities issuers succeed in the world's rapidly evolving financial markets, the Company delivers the industry's most comprehensive suite of integrated depositary receipt, corporate trust, and stock transfer services. Additional information is available at www.adrbny.com.

The Bank of New York Mellon Corporation is a global financial services company focused on helping clients manage and move their financial assets, operating in 37 countries and serving more than 100 markets. The company is a leading provider of financial services for institutions, corporations and high-net-worth individuals, providing superior asset management and wealth management, asset servicing, issuer services and treasury services through a worldwide client-focused team. It has more than $20 trillion in assets under custody and administration and more than $1 trillion in assets under management. Additional information is available at www.bnymellon.com.

The Bank of New York Mellon provides no advice nor recommendation or endorsement with respect to any company or security. Nothing herein shall be deemed to constitute an offer or solicitation of an offer to buy or sell securities.