HOUSTON--(BUSINESS WIRE)--Sept. 28, 2005--Waste Management, Inc. (NYSE:WMI) announced that it has scheduled an analyst conference call on Thursday, October 27, 2005 from 9:00 - 10:00 a.m. Central Time (10:00-11:00 a.m. ET) to discuss third quarter 2005 financial results. These results are expected to be released before the opening of the market on Thursday, October 27, 2005 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, Cherie Rice, Vice President Finance and Treasurer, 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 9843424." 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 and Quarterly Report on Form 10-Q filed with the SEC and available from the Company.

What:   Waste Management third quarter 2005 earnings release
        conference call

When:   Thursday, October 27, 2005, 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 "3Q2005 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 11:00 a.m. CT October 27th through 5:00 p.m. CT on November 10th. 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 9843424.

Waste Management, Inc. is its industry's leading provider of comprehensive waste management services. Based in Houston, the Company serves municipal, commercial, industrial and residential customers throughout North America.

    CONTACT: Waste Management, Inc., Houston
             Analysts: Greg Nikkel, 713-265-1358
             or
             Media: Lynn Brown, 713-394-5093
             Web site: http://www.WM.com

    SOURCE: Waste Management, Inc.