Severn Trent De Nora is the combination of the seawater onsite hypochlorite generation businesses of Severn Trent Services and Gruppo DeNora. The joint venture encompasses the products, services, and operations of their respective subsidiaries, Exceltec International Corp. and DeNora Seaclor, S.r.l. The product lines included are OMNIPURE™, OMNIPURE™ Series 55, MARINER OMNIPURE® and MARINER OMNIPURE® Series M55 marine waste treatment systems, SANILEC® and SEACLOR® electrochlorination systems and BALPURE® ballast water systems..