ARCADIS Wins Large Waste Water Project in Brazil

ARNHEM, The Netherlands, June 25, 2010 - ARCADIS (EURONEXT: ARCAD), the international design, consulting,
engineering and management services company, today announced that a
consortium led by its Brazilian subsidiary ARCADIS Logos, has signed a US$54
million contract with SABESP, the Sao Paulo State Basic Sanitation Company.
Under the contract ARCADIS will provide project management services for the
extension of the infrastructure for collection, removal and treatment of
waste water in the Sao Paulo metropolitan area. The project, entitled Tiete -
phase III, has a five year time frame. ARCADIS Logos holds a 35% share of the
five year contract.

The total investment for the program will amount to US$ 1.1billion. Its
main objective is improvement of the environment and the quality of life for
the population in the extreme northern and eastern sections of Sao Paulo. The
project comprises the construction of 1,250 km additional sewerage network,
580 km of main sewers and interceptors, and the increase of the sewage
treatment capacity by 7.4 m3/s.

The project completion is scheduled for the year 2016 and is expected to
generate around 80,000 direct and indirect jobs. At the peak of its
activities, the consortium management team will mobilize approximately 200
people.

"Once more we have benefited from our focus on the long term and
successful partnership with our customers. This contract consolidates a
relationship of more than 30 years of services provided by our company to
SABESP and exemplifies the many opportunities we have in the strongly growing
Brazilian market", said Manoel Antonio A. Avelino da Silva, CEO of ARCADIS
Logos.

About ARCADIS:

ARCADIS is an international company providing consultancy, design,
engineering and management services in infrastructure, water, environment and
buildings. We enhance mobility, sustainability and quality of life by
creating balance in the built and natural environment. ARCADIS develops,
designs, implements, maintains and operates projects for companies and
governments. With 15,000 employees and EUR 1.8 billion in revenues, the
company has an extensive international network supported by strong local
market positions. ARCADIS supports UN-HABITAT with knowledge and expertise to
improve the quality of life in rapidly growing cities around the world. Visit
us at: www.arcadis.com

For more information please contact Mark Zellenrath at +31-26-3778348 -or outside office hours at +31-6-50736265 or via email mark.zellenrath at arcadis.com: ARCADIS NV Nieuwe Stationsstraat 10, P.O. Box 33, 6800 LE Arnhem, The Netherlands, Tel +31-26-3778-292