UV Disinfection for Swimming Pools

How Does Ultraviolet Work?

Ultraviolet energy causes permanent inactivation of micro-organisms by disrupting DNA so that they are no longer able to maintain metabolism or reproduce. The maximum effectiveness occurs at between 240nm and 280nm, with the most effective wavelength typically at 254nm. The Sukrut UV Spektrotherm HP lamp produces this wavelength in abundance. All bacteria, spores, viruses and protozoa (including Cryptosporidium and Giardia oocysts) are permanently inactivated by UV.

The Role of UV in Swimming Pools

The primary action of UV is to kill bacteria, viruses, moulds and their spores, thus reducing the risk of transmission of stomach, skin and respiratory tract infections to bathers. UV has an important secondary action: it initiates photo-chemical and photo oxidation reactions which destroys chloramines, a range of compounds responsible for unpleasant smells in pools. This is particularly important in leisure pools where features such as water slides and waves give a greater surface area for the release of chloramines into the air; UV reduces the burden, making the atmosphere safer and more pleasant. Total to bound ratio of > 4:1 are typical of pool water treated by Sukrut UV.

Swimming pool water purification with UV

Sukrut UVequipment is effective within the guidelines of the Pool Water Advisory Group and allows safe reduction in residual chlorine levels to the new recommendations, whilst achieving a total to bound ratio >4:1.

Max. Combined Chlorine Levels

Germany 0.20 ppm
Denmark 0.20 ppm
Italy 0.30 ppm
Sweden 0.40 ppm
Norway 0.50 ppm


UV is effective against all pathogens including emerging pathogens such as Cryptosporidium Provides excellent water quality and a more pleasant bathing Environment

  • Treats full recirculating flow
  • Reduces the amount of chemicals required, typically by 50%
  • No breathing apparatus required
  • UV is not hazardous
  • Lower Capital investment than other comparable technologies
  • Considerable savings on chemicals, electricity, maintenance and personnel
  • Simple installation and operation
  • Available for new builds or as a retrofit to older pools
  • No additional filters, contact vessels or pumps required
  • Timers used for night shut-down

UV Systems
Selection of the appropriate UV model for each application should be decided in conjunction with a Sukrut UV specialist, who will also advise on the installation and dose.