Benefits of UV

Improves Health & Safety

UV is a highly effective disinfection technology used widely in drinking water and beverage production. A correctly sized medium pressure (MP) UV treatment system will allow swimming pool operators to reduce their residual chlorine levels down to as little as 0.5 ppm.
Even the 17 known chlorine-resistant pathogenic microorganisms such as Cryptosporidium and Giardia are easily treated with UV.

“Installing an atg UV Technology ultraviolet disinfection system provides a minimum 3 log (99.9% kill) of harmful microorganisms, typically allowing operators to maintain
0.5 - 0.8 ppm of free chlorine, whilst reducing combined chlorine to levels as low as 0.2 ppm”


Cryptosporidium Barrier

UV-C light is a proven and effective barrier for Cryptosporidium and other emerging chlorine resistant microorganisms such as Giardia. Used extensively in drinking water for over 100 years, many leisure operators are now installing UV systems as standard to ensure their water does not pose a risk to public health and safety.  Due to a thick outer membrane, it takes more than 10 days to destroy cryptosporidium in a normal pool using traditional chemical methods (25 OC with free chlorine levels of 1 ppm).
Considered the best protection technology available, UV systems are proven as an effective barrier to safeguard against Cryptosporidium, Giardia and the 15 other chlorine resistant waterborne microorganisms.
Only UV systems that have undergone independent 3rd party validation testing can be trusted to deliver a 99.9% reduction of Cryptosporidium in a single pass.

“In 2004 over 5,000 New York residents became infected with Cryptosporidium, caused by ineffective disinfection of public swimming pools. The scale of the outbreak lead to the passing of new laws requiring UV systems to be installed on all public swimming pools throughout the State”


Reduces Chloramines & Significantly Improves Water Quality

Chloramines are the unpleasant chemical compounds formed when chlorine combines with the nitrogenous compounds such as uric acid, urea, ammonia, histidine and creatine introduced to the pool environment by bathers. introduced to the pool by bathers.

As the cause of itchy skin, eye irritations (red eye), headaches and unpleasant chemical odours, chloramines pose a significant problem for leisure operators worldwide. Independent research has linked chloramines as a cause of asthma in regular swimmers, lifeguards, and instructors.
Chloramines also damage the structure of aquatic facilities though corrosive condensation, degrading structural steel, roof supports, furniture, pool side equipment and ventilation ducts. 

Medium pressure UV systems initiate photo-oxidation reactions which oxidise unwanted organic contaminants, resulting in crystal clear, sparkling water. This occurs both by direct photolysis and through the production of hydroxyl radicals, a highly reactive chemical species which oxidises and breaks down organic compounds and contaminants. These reactions lower the organic loading of the water and significantly improve its clarity.  The polychromatic wavelengths of medium pressure UV systems break the bonds within all three of the chloramine molecules (low pressure UV is effective only on mono-chloramine): -

  • Monochloramine (NH2Cl): 245 nm
  • Dichloramine (NHCl 2): 297 nm
  • Trichloramine (NCl 3 ): 260 nm and 340 nm

The result is crystal clear water and fresh clean air. Requirements for ‘shock dosing’, and additional chlorine are reduced, and in most cases, combined chlorine levels are reduced to as little as 0.2 ppm.