News Release New Mini Chlorine Dioxide Unit an Ideal Solution for Legionella Control BIRMINGHAM, United Kingdom – June 12, 2007 – Severn Trent Services have introduced a new mini chlorine dioxide generator, the Capital Controls™ T70GS4000, which is ideal for applications such as Legionella control in cooling water and building services industries. With a generating range of 2g/day to 10g/hour, the equipment can be used for safe, on-demand production of chlorine dioxide where very low dosage rates are required. The company’s leadership line of Capital Controls chlorine dioxide generation equipment has a range of 2g/day to 10,000g/hour. In addition to its use in controlling Legionella, the T70GS4000 can be used for primary water disinfection, THM reduction, iron and manganese removal in potable water treatment, wastewater treatment, and in the food and beverage industry for microbiological control. More than 245 Capital Control systems have been installed across Europe by Severn Trent Services over the last seven years. The systems employ an established and proven technology to offer a reliable, flexible and a low-cost method of chlorine dioxide production. About Severn Trent Services Severn Trent Services (www.severntrentservices.com), headquartered 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, state-of-the-art residential metering products and services. Our analytical services group is the United Kingdom's leading environmental testing organization, and 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. Severn Trent is a FTSE 100 company. ###