Emerging Contaminants is an outlet for world-leading research addressing problems associated with environmental contamination caused by emerging contaminants and their solutions.Emerging contaminants are defined as chemicals that are not currently （or have been only recently） regulated and about which there exist concerns regarding their impact on human or ecological health. Examples of emerging contaminants include disinfection by-products, pharmaceutical and personal care products, persistent organic chemicals, and mercury etc. as well as their degradation products. We encourage papers addressing science that facilitates greater understanding of the nature, extent, and impacts of the presence of emerging contaminants in the environment； technology that exploits original principles to reduce and control their environmental presence； as well as the development, implementation and efficacy of national and international policies to protect human health and the environment from emerging contaminants.