Severn Trent Services-Apliclor Provides Chlorine Dioxide Disinfection System for Spanish Drinking Water Treatment Plant

BARCELONA, Spain - 17 June 2010 - Severn Trent Services-Apliclor, a leading supplier of water and wastewater treatment solutions, has been selected to design and install a new disinfection system for the Iznájar Drinking Water Treatment Station, which supplies 235,000 residents in the Spanish province of Cordoba. The system utilizes Aquadiox® chlorine dioxide generators to produce chlorine dioxide on site, providing residual disinfection to prevent bacteria from forming in the distribution network. The new disinfection system, due to be completed by the end of 2010, will improve water disinfection and enable a doubling of water treatment capacity, from 51,840 m³/day to 103,680 m³/day. The contract, which also includes upgrading the existing chlorine gas dosing equipment, is valued at 370,000 (USD $493,000).

According to Rick Bacon, general manager of Severn Trent Services-Apliclor, chlorine dioxide will be used for disinfection as an alternative to the traditional use of chlorine. "Chlorine dioxide reacts less with organic matter present in the distribution network, thus eliminating odours and minimizing the formation of Trihalomethanes, a disinfection by-product that is considered harmful to human health and the environment."

Severn Trent Services-Apliclor has recently completed a number of major water and wastewater projects in Spain including work in the provinces of Seville, Malaga and Cordoba.

About Severn Trent Services

Severn Trent Services (, with global headquarters in Fort Washington, Pa., USA, is a leading supplier of water and wastewater solutions. The company's broad range of products and services is concentrated around disinfection, instrumentation and filtration technologies, and contract operating services. Our analytical services group is the United Kingdom's leading environmental testing organization, and our international operating services business provides worldwide contract operation and support for 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. Severn Trent is a FTSE 100 company.

About Severn Trent Services-Apliclor

In Spain, Severn Trent Services-Apliclor has nearly 100 years experience in the treatment of water and has been a part of Severn Trent Services since 2009. The company's headquarters is in Sant Marti Sesgueioles (Barcelona) in a 19,000 m2 facility. The technical division designs installations for the treatment of water and carries out the maintenance of these plants, while the chemical division sells products for the purification and maintenance of swimming pools.

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