Severn Trent Services Provides Arsenic Removal Media for El Paso, Texas

Bayoxide® E33 media offers lowest capital cost compared to competitive technologies

FORT WASHINGTON, Pa.- September 1, 2006 - Bayoxide® E33 arsenic removal media from Severn Trent Services has been selected for use by the City of El Paso, Texas at three water treatment facilities that serve the city's population. The facilities- the Cielo Vista, the Eastwood and the Northeast- comprise 31 separate wells and have a combined capacity of 50 million gallons of treated water per day. Total arsenic levels in these and other surrounding wells had been as high as 30 parts per billion (ppb). The new treatment systems have enabled the city to reduce arsenic levels below the EPA arsenic standard for drinking water of 10 ppb.

El Paso Water Utilities chose Bayoxide E33 after pilot testing eight different adsorption products to reduce arsenic levels. Bayoxide E33 is a dry, robust, ferric oxide media designed with a high capacity for arsenic, providing long operating cycles and low operating costs. Compared to competitive technologies, the Severn Trent Services media offers the lowest capital cost while providing ease of operation and maintenance. The media has been permitted for use by health and environmental agencies in 18 states, more than any other arsenic removal technology.

Severn Trent also has developed the SORB 33® process and technology to reduce arsenic. The process has been commercially proven to effectively and economically meet the stringent new government standard across a range of water treatment applications to reduce arsenic contamination. The SORB 33 process can be used in conjunction with Bayoxide E33 media.

About Severn Trent Services
Severn Trent Services (, based in Fort Washington, Pa., is a leading supplier of water and wastewater treatment solutions. The company's broad range of products and services is concentrated around disinfection, instrumentation and filtration technologies, contract operating services and state-of-the-art residential metering products and services. Our international management services business provides support in all aspects of water and wastewater utility operational development and business transformation. Severn Trent Services is a member of the Severn Trent Plc (London: SVT.L) group of companies. An international environmental services leader, Severn Trent is a FTSE 100 company.

Lori Doppelt
Tel: 215-997-3727

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