Waste Management, Inc. Sets Date for

Second Quarter 2009 Earnings Release Conference Call

and Announces Third Quarter 2009 Conference Presentation Schedule

HOUSTON – June 25, 2009 -- Waste Management, Inc. (NYSE: WMI) announced that it has

scheduled an analyst conference call on Thursday, July 30, 2009 at 10:00 a.m. Eastern Time to

discuss second quarter 2009 financial results. These results are expected to be released before

the opening of the market on Thursday, July 30, 2009 and will be available on Waste

Management’s website, www.wm.com, after release to the wire services.

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 second quarter 2009 earnings release conference call

When: Thursday, July 30, 2009 at 10:00 a.m. Eastern Time

Where: A live audio webcast of the conference call can be accessed by logging onto

www.wm.com and selecting “Earnings Webcast” in the Business News section.

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 16261765.” US/Canada Dial-In #: (877) 710-6139. Int'l/Local Dial-

In #: (706) 643-7398. Participation will be in listen-only mode.

Replay: For those unable to listen to the live call, a replay will be available beginning at

approximately noon ET July 30th

through 5:00 p.m. ET on August 13th.

To hear a replay of the call over the Internet, access Waste Management’s 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 16261765.

Waste Management, Inc. also announced today that Company executives currently plan to

present at the following investment conferences during the third quarter of 2009:

September 10 Raymond James European Investors Conference

September 16 J.P. Morgan Diversified Industries 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 these conferences will be web cast and we will post audio

links on our website as they are made available to us.