In 1977, Harry O'Hare began experimenting with EDI and created the first working prototype. Prototype testing was done at Southern Research Institute (SRI). This ground-breaking work led to the founding of HOH Water Technology, Inc. in 1979. HOH applied for the first EDI patents in 1981, which were issued in 1984, preceding the Millipore/Ionpure patents by two years. During the product development years of 1981-1989 a wide variety of EDI prototypes were designed and tested, including cylindrical EDI in a pressure vessel. With its new technology launched, the company went public in 1987.
In 1996, HOH changed its name to Electropure and began aggressively marketed the EPM™ product line which became popular with a number of the "early adopters" in the pure water industry. Electropure licensed its technology to Glegg Water in 1994, enabling Robert Glegg to develop E-Cell®.
In 1998 Electropure finished development and patented its Excellion™ ion exchange membranes and process, which enabled the XL™ product line to be developed in 1999.
2004 marked the introduction of the Electropure XL-HTS™ (High Temperature Stable) product line. SnowPure’s product line expanded again in 2005 with the introduction of Zapwater™ EDI for laboratories. SnowPure, a private corporation, was formed in 2005 and via a management buyout, acquired Electropure’s EDI division. In 2006, SnowPure embarked on an aggressive expansion in China, opening up its sales office in Shanghai.
In 2007, SnowPure celebrated the 30th anniversary of Electropure™ EDI, and simultaneously launched the XL-R industrial product line. SnowPure International was formed in Hong Kong in 2008. The next year was highlighted by the addition of a revolutionary low-energy, compact UV product to the SnowPure line. In 2011, SnowPure launched the EXL™ series worldwide and opened a global production and logistics facility in China. SnowPure continues to create new innovations while expanding its world market presence in the pure water industry.
*Note: in 2005 Electropure Inc (public, ELTP) was renamed to Micro Imaging Technology Inc (now traded under MMTC). Shareholders of ELTP are now shareholders of MMTC. SnowPure is a privately held corporation.