In the latter part of the 19th Century, UV light was shown to inactivate microorganisms (Downes and Blunt 1878–1879). The 1960's saw the development of UV disinfection equipment. This was done by early technologists as they integrated the latest lamps, ballasts and sensor technologies.
UV light was used to disinfect drinking water as early as 1906 (von Recklinghausen 1914). At that time no one disinfected wastewater. Chlorine eliminated the use of UV for disinfecting drinking water in North America, but not Europe.
Our earliest systems date back to 1960s and our first commercial unit was introduced to the market in 1970.
In the late 1970’s the United States Environmental Protection Agency (USEPA) evaluated UV disinfection and provided research money and construction grants for a variety of different UV disinfection technologies.
These first systems enabled the industry to demonstrate the technology and its effectiveness.