Waste Management, Inc. Announces First Quarter 2006 Earnings Release Conference Call and Second Quarter 2006 Conference Presentation Schedule

Date: March 30, 2006

Source: Business Wire

Waste Management, Inc. (NYSE: WMI) announced that it has scheduled an analyst conference call on Thursday, April 27, 2006 from 9:00-10:00 a.m. Central Time (10:00-11:00 a.m. ET) to discuss first quarter 2006 financial results. These results are expected to be released before the opening of the market on Thursday, April 27, 2006 and will be available on Waste Management's website, 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 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 7247347." 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 2006 earnings release
conference call

When: Thursday, April 27, 2006, from 9:00-10:00 a.m. CT
(10:00-11:00 a.m. ET)

Where: www.wm.com

How: Live over the Internet, logging on to the address
above and selecting "1Q2006 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
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 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
www.wm.com. To hear a telephonic replay of the
call, dial 800-642-1687 or 706-645-9291 and enter
conference code 7247347.

Waste Management, Inc. also announced today that Company executives currently plan to present at the following investment conferences during the second quarter of 2006:

June 1 Credit Suisse Engineering & Environmental Services
Conference

June 6 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.

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