ADEQ Water Treatment Grade 4 Practice Test

Taste and odor in treated water come from substances present in the water before or during treatment and from how disinfectants interact with those substances. Algal blooms introduce organic compounds that give musty or earthy odors. Disinfection byproducts form when disinfectants react with natural organic matter, which can produce noticeable tastes and odors. Chemical dosing, such as the amount and type of disinfectant used, can also influence the final taste and odor by affecting residual compounds and reactions in the water. Pipe material, while it can affect water quality through leaching or corrosion in the distribution system, is not a factor typically listed as influencing taste and odor in the water at the treatment stage. Therefore, the factor not listed as influencing taste and odor in treated water is pipe material.