Abstract: When problems of wastewater odor arise, there are numerous solutions available to the wastewater utility, and yet determining which solution will provide best outcome is often extremely difficult, even for those with significant expertise. Appropriate for wastewater collections and treatment professionals of all levels, Odor Control 101 examines the basic concepts of odor generation and emission, and what to do when odors become a problem, including critical factors to consider in technology selection as well as common mistakes and oversights. The presentation will additionally cover use cases and limitations of the majority of available aqueous and vapor phase control solutions, presenting short case examples of each (from Tennessee and Kentucky municipalities as available), with the goal of empowering the treatment professional to select the best odor control solutions for their facility.