HOUSTON--(BUSINESS WIRE)--March 27, 2007--Waste Management, Inc. (NYSE:WMI) announced that it has scheduled an analyst conference call on Friday, April 27, 2007 from 9:00-10:00 a.m. Central Time (10:00-11:00 a.m. ET) to discuss first quarter 2007 financial results. These results are expected to be released before the opening of the market on Friday, April 27, 2007 and will be available on Waste Management's website, http://www.wm.com, after release to the wire services.

Waste Management invites you to listen to the analyst conference call, which is open to the public and will be broadcast live over the Internet, at http://www.wm.com. Company spokespersons will include David Steiner, Chief Executive Officer, Larry O'Donnell, President and Chief Operating Officer, Robert G. Simpson, Senior Vice President and Chief Financial Officer, and Greg Nikkel, Director - Investor Relations.

You may also listen to the analyst conference call by telephone by contacting the conference call operator 5-10 minutes prior to the scheduled start time and asking for the "Waste Management Conference Call - Call ID 3382502." US/Canada Dial-In #: (877) 710-6139. Int'l/Local Dial-In #: (706) 643-7398.

Certain statements and answers to questions during the conference call may contain "forward-looking statements." These statements, and all phases of the Company's operations, are subject to risks and uncertainties, any one of which could cause actual results to differ materially from those described in the forward-looking statements. Investors are reminded that these forward-looking statements must be considered in conjunction with the cautionary warnings and risk factors, which are detailed in Waste Management's most recent Annual Report on Form 10-K filed with the SEC and available from the Company.

What: Waste Management first quarter 2007 earnings release conference call

When: Friday, April 27, 2007, from 9:00-10:00 a.m. CT (10:00-11:00 a.m. ET)

Where: http://www.wm.com

How: Live over the Internet, logging on to the address above and selecting "1Q 2007 Earnings Report Webcast." You can also listen to the conference call by telephone at the number above. Participation will be in listen-only mode.

Requirements: To listen to the call over the Internet, you will need a computer with a sound card, speakers or headphones, and at least a 28.8 Kbps connection to the Internet. If you do not have the Real Player plug-in for your browser, please download it from http://www.real.com/products/player/

Replay: For those unable to listen to the live call, a replay will be available 24 hours a day beginning at approximately noon CT April 27th through 5:00 p.m. CT on May 11th. To hear a replay of the call over the Internet, access the Waste Management Website at http://www.wm.com. To hear a telephonic replay of the call, dial 800-642-1687 or 706-645-9291 and enter conference code 3382502.

Waste Management, Inc. also announced today that Company executives currently plan to present at the following investment conferences during the second quarter of 2007:
     June 7        Credit Suisse Environmental & Engineering Services Conference
     June 12       JP Morgan Basics & Industrials Conference

Although these presentations are not expected to include any material non-public information, the Company will post the presentation slides on its website. The slides will be posted some time during the 24-hour period prior to the scheduled presentation time. The slides may be accessed via the Investor Relations section of the Company's corporate website, which is located at www.wm.com. We anticipate that all of these conferences will be web cast and we will post audio links on our website as they are made available to us.

Waste Management, based in Houston, Texas, is the leading provider of comprehensive waste management services in North America. Our subsidiaries provide collection, transfer, recycling and resource recovery, and disposal services. We are also a leading developer, operator and owner of waste-to-energy and landfill gas-to-energy facilities in the United States. Our customers include residential, commercial, industrial and municipal customers throughout North America. Ways in which Waste Management helps Think Green(R) can be found at www.wm.com.
CONTACT: Waste Management, Inc., Houston
             Analysts: Greg Nikkel, 713-265-1358
             or
             Media: Lynn Brown, 713-394-5093
             http://www.WM.com

SOURCE: Waste Management, Inc.