Covanta to Report Second Quarter on July 20

Date: June 30, 2011

Source: Covanta Holding Corporation

Covanta Holding Corporation Second Quarter Earnings Conference Call to be Held on July 21, 2011

Covanta Holding Corporation (CVA) will host a conference call at 8:30 AM (Eastern) on Thursday, July 21, 2011 to discuss its second quarter results.

A press release reporting our second quarter results will be issued after the market closes on Wednesday, July 20, 2011 and will also be available in both the News and the Investor Information sections of the Company's website. We expect the Company's Quarterly Report on Form 10-Q for the three and six months ended June 30, 2011 to be issued during the week of July 24, 2011 and to include additional XBRL information required at this time.

The conference call will begin with prepared remarks, which will be followed by a question and answer session. To participate, please dial 877-806-3982 approximately 10 minutes prior to the scheduled start of the call. If you are calling from outside of the United States, please dial 702-928-7062. Please utilize conference ID number 78213858 when prompted by the conference call operator. The conference call will also be webcast live from the Investor Information section of the Covanta Energy website. A presentation will be made available during the call and will be found on the Investor Information section of our website at www.covantaenergy.com.

A replay of the conference call will be available from 11:30 AM (Eastern) Thursday, July 21, 2011. To access the replay, please dial 800-642-1687 or from outside of the United States 706-645-9291 and use the replay conference ID number 78213858. The webcast will also be archived on www.covantaenergy.com.

About Covanta

Covanta Energy is an internationally recognized owner and operator of large-scale Energy-from-Waste and renewable energy projects and a recipient of the Energy Innovator Award from the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy. Covanta's 44 Energy-from-Waste facilities provide communities with an environmentally sound solution to their solid waste disposal needs by using that municipal solid waste to generate clean, renewable energy. Annually, Covanta's modern Energy-from-Waste facilities safely and securely convert approximately 20 million tons of waste into 9 million megawatt hours of clean renewable electricity and create more than 9 billion pounds of steam that are sold to a variety of industries. For more information, visit www.covantaenergy.com.

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