Sweco — Environmental & Social Information 2011

Jan 13, 2011

PRESS RELEASE

13 January 2011

Sweco wins environmental contract in Montenegro

Sweco has been chosen to improve the ecosystem in and around the Balkans' largest lake, Lake Skadar. The contract is worth over EUR 675,000 and is being carried out at the request of the Ministry for Spatial Planning and Environment in Montenegro.

Under the contract, Sweco will study and propose remediation measures at a deposit for waste products from an aluminium smelter outside the capital city of Podgorica. The mixed waste from earlier production activities threatens the surface and ground water that drains into Lake Skadar.

The project is being financed by the World Bank and is part of a broader initiative to improve the ecosystem in the Lake Skadar watershed.

Sweco's assignment consists of three parts:

• On-site investigation of solid waste, soil and groundwater
• Analysis of water, soil and solid waste, and of possible remediation measures and proposals for an optimal pollution management solution
• Preparation of a detailed remediation plan and cost estimates

Sweco is an international consulting group with combined expertise in consulting engineering, environmental technology and architecture. Sweco has 5,300 employees in 11 countries and recorded annual sales of more than SEK 5.3 billion in 2009. The company has projects currently underway in some 90 countries worldwide. Sweco is listed on NASDAQ OMX Stockholm AB.

For additional information contact:

Per Olof Seman, Assignment Manager at Sweco, +46 8-695 62 42, perolof.seman@sweco.se Towe Ireblad, Assistant Assignment Manager at Sweco, +46 8- 695 62 54, towe.ireblad@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.

Telephone +46 8-695 60 00 E-mail info@sweco.se www.swecogroup.com