Sweco

Regulatory Filings • Feb 2, 2010

PRESS RELEASE

2 February 2010

SWECO WINS NEW ENVIRONMENTAL CONTRACT IN RUSSIA

Sweco has been commissioned to modernise St. Petersburg's northern wastewater treatment plant, a facility that will take care one fifth of the city's water. Among other things, the project will lead to reduced emissions of phosphorous and nitrogen in the Baltic Sea. The contract is worth over EUR 730,000.

"Sweco carried out its first international assignment in Russia more than 100 years ago. Both then and now, our goal is to contribute to a better environment for the people around the Baltic Sea," says Sweco's CEO Mats Wäppling.

St. Petersburg's northern wastewater treatment plant will be upgraded to meet the requirements in the Helsinki Convention on the Protection of the Marine Environment in the Baltic Sea Area. Treatment of phosphorous and nitrogen will be improved and substantial energy savings, up to 20 GWh per year, are also planned in connection with modernisation. Sweco's contract includes both engineering design and construction control services.

One million of the city's five million residents are connected to the plant, which is dimensioned for a load of 1,000,000 m3 per day.

The assignment will be carried out by Sweco's environmental consultants in Sweden and Russia. The modernisation is part of a large-scale investment programme aimed at addressing wastewater emissions into the Gulf of Finland.

Sweco is a provider of international consulting engineering services with combined expertise in engineering, environmental technology and architecture. The Group has annual sales of approximately SEK 5.5 billion and 5,200 employees in ten countries. The company has projects currently underway in some 80 countries worldwide. Sweco is listed on NASDAQ OMX Stockholm AB.

For further information please contact:

Guy Taylor, Assignment Manager at Sweco, +46 8-695 61 60, guy.taylor@sweco.se Bo Carlsson, President Sweco Environment, +46 8-695 63 03, bo.carlsson@sweco.se Christer A Andersson, Overseas Manager, Sweco Environment, +46 8-695 65 30, christer.a.andersson@sweco.se

The information contained herein may be subject to the disclosure requirements in the Swedish Securities Exchange and Clearing Operations Act and/or the Financial Instruments Trading Act.

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