UV (Ultraviolet) water purification, a green alternative for public water treatment

Back in 2008 there was a published report by Global Water Intelligence that came to the following conclusion. One of the fastest growing water treatment technologies is UV water disinfection and purification. The water treatment industry uses a high-powered form of UV light called UV-C or “germicidal UV” to disinfect water. UV water disinfection performance is tied to the first laws of Photochemistry where only the light that is absorbed by a molecule can be effective at producing a photochemical change in the molecule. What this means is that in order for UV Water Treatment systems to work the light must be absorbed by the organism(s) in the water. Then the UV light causes damage to the DNA  and RNA structure preventing it form being able to replicate itself.  UV Water treatment systems are effective in destroying 99.99% of harmful microorganisms, including E. coli, Cryptosporidium, and Giardia.


Municipal water treatment facilities are looking to this new form of water treatment as a viable green alternative for public water treatment. Public officials are looking to avoid water contamination problems with public sources such as the 1993 Cryptosporidium outbreak in Milwaukee, WI. Currently California is leading the charge with UV water treatment implementation. Public elected officials, regional labor leaders, and the San Francisco Public Utilities Commission (SFPUC) have recently broke ground on what will be California’s largest ultraviolet (UV) water disinfection facility when completed in 2011.


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