Many times, aesthetics are the only problem preventing the use of these alternate water sources for potable purposes. Due to its oxidizing power, ozone is used successfully in applications requiring reduction of aesthetically unpleasant color, taste and odor. It has also proven to be beneficial as a microflocculent, aiding in the filtration process.
Apparent color is due to both light absorption and light scattering.
Dissolved matter exclusively causes true color. Organic matter, which absorbs light within the 300 to 400 nm wavelengths, and fluoresces in the range of 200 to 400 nm, creates the appearance of color in water. Typically, these materials are organic in nature and contain aromatic rings. Typical organics falling into this classification include humic and fulvic acid. Ozone is most effective at reducing true color.