ARNHEM, The Netherlands, July 10 /PRNewswire/ -- ARCADIS (EURONEXT: ARCAD), the international consultancy, design, engineering and management services company, announced today that the Company has been selected by the Cleantech Group(TM), LLC to join its prestigious Cleantech Index(TM) (AMEX: CTIUS) of public cleantech companies, effective June 30, 2008.

The Cleantech Group's Cleantech Index is the first, and only, equity index to offer investors and index licensees an easy, liquid and cost-effective way to track and invest in the broad cleantech category. Unlike indices that specifically track narrow sectors such renewable energy or water, the Cleantech Index includes the leading companies from a broad range of sectors such as advanced materials, agriculture, transportation, manufacturing, in addition to energy efficiency, renewables and water.

Now comprised of 76 publicly traded companies, the Cleantech Index is the industry gold standard upon which a growing range of financial products are based. In 2007, the Index outperformed the S&P 500 Index by 37.4%, over the last 12 months by 26.3%, and in 2008 (through June 27) by 6.5%.

"ARCADIS is the world's leading provider of environmental services to private sector companies, and as such it is logical that we are now included in this index," says ARCADIS CEO Harrie Noy. "In addition, we have a stated goal of becoming the global leader in sustainability in our business, further underlining the right choice Cleantech has made."

"ARCADIS' addition to the Cleantech Index reflects the significance of the company to global cleantech investors," said Rafael Coven, Managing Director of Cleantech Indices for the Cleantech Group, LLC, and Index Advisor.

With its inclusion in the Cleantech Index, ARCADIS is also now being traded in funds based upon CTIUS, including the PowerShares Cleantech Portfolio ETF (Amex: PZD) and KSM Cleantech ETF (Bloomberg: KSMCLNT:IT) in Israel, among others.

About ARCADIS

ARCADIS is an international company providing consultancy, design and engineering and management services in infrastructure, environment and buildings, to enhance mobility, sustainability and quality of life. ARCADIS develops, designs, implements, maintains and operates projects for companies and governments. With more than 13,500 employees and EUR 1.5 billion in gross revenue, the company has an extensive international network that is supported by strong local market positions. Visit us on the internet: http://www.arcadis-global.com

About the Cleantech Group, LLC

The Cleantech Group pioneered the cleantech investment category in 2002. Today, it accelerates the development and market adoption of clean technologies globally through membership in the largest global network of investors and companies, representing more than US$3 trillion in assets. Member investors, growth companies/vendors, enterprises, service providers, and others receive access to capital, investment opportunities, market leading research and data, insight, sales opportunities, human capital, and promotional opportunities. The Cleantech Group also produces the premier Cleantech Forum events worldwide. Details at http://www.cleantech.com.

For more information on the Cleantech Index: http://www.cleantechindex.com/

For more information on ARCADIS, contact: Joost Slooten at +31-26-3778604; or e-mail at j.slooten@arcadis.nl