The present invention provides a system for water treatment. The system includes a chamber, a UV light source, and a housing. The chamber has an inlet for receiving ozone mixed water and a transparent portion configured to allow UV light to pass. The UV light source has a protective shell that comprises a first portion and a second portion, the first and second portions configured to pass UV light at a first and second wavelength, respectively. The housing having an air inlet and an air outlet, the housing configured to secure the UV source and to receive a portion of the chamber, wherein the UV source and the chamber is affixed to the housing such that the transparent portion of the chamber is exposed to the first portion of the protective shell, thereby exposing the ozone mixed water to UV light with the first wavelength, and wherein the second wavelength convert oxygen molecules from the air inlet into ozone molecules.