Severn Trent Services Receives Approval for SORB 33® and Bayoxide® E33 from the French Ministry of Health and Solidarity


FORT WASHINGTON, Pa. - March 14, 2006 - Severn Trent Services has received approval from the French Ministry of Health and Solidarity for its SORB 33® treatment system and Bayoxide® E33 media for the removal of arsenic in water destined for human consumption.

The SORB 33 process and technology developed by Severn Trent Services to reduce arsenic contamination has been commercially proven to effectively and economically meet arsenic levels of 10 parts per billion and below across a range of water treatment applications. 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, Bayoxide E33 offers the lowest capital cost while providing ease of operation and maintenance. In addition to the approval from the French Ministry of Health and Solidarity, Bayoxide E33 also has received NSF Standard 61 certification and approval by the Drinking Water Inspectorate in the United Kingdom.

About Severn Trent Services
Severn Trent Services (www.severntrentservices.com), 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, pipeline analysis, rehabilitation and repair services, 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.

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