Aquion, Inc. is a manufacturer and marketer of premium water treatment equipment and water quality solutions that serve a variety of markets around the world. We have been manufacturing water treatment equipment since 1953. We offer a diverse line of water conditioners, iron filters, carbon filters, drinking-water purifiers, ozone and ultraviolet disinfection systems, reverse osmosis systems and acid neutralizers for the residential and commercial water treatment industry. Our products carry quality and performance certifications from NSF, WQA and UL. Our 160,000 sq. ft state of the art ISO 9001-2008 certified manufacturing facility, located in Roselle, IL, is specifically designed to serve a large, national and international distribution network. In addition, our CWT division manufacturing operations are located in San Luis Obispo, CA. Our Erie Water Treatment Controls division also has manufacturing operations in Olen, Belgium.