Hamadan University of Medical Sciences Avicenna Journal of Environmental Health Engineering 2423-4583 8 2 2021 12 31 Herbicide Residues in Water Resources: A Scoping Review 126 133 10.34172/ajehe.2021.16 EN Sahand Jorfi https://orcid.org/0000-0003-2505-7356 Fakher Rahim Alireza Rahmani Nematollah Jaafarzadeh https://orcid.org/0000-0003-2516-2340 Zeinab Ghaedrahmat Halime Almasi https://orcid.org/0000-0002-8014-1465 Amir Zahedi https://orcid.org/0000-0001-9328-1750 Journal Article 10.34172/ajehe.2021.16 2021 10 20 2021 12 21 Several recent studies have focused on leaching pesticides from agricultural soils into surface and groundwater resources during irrigation. As a result, information about herbicide residues in water was necessary for conserving related resources. This study provided an overview of monitoring herbicides in water resources worldwide. In this scoping review, five databases were searched for publications (1990 to April 2021), including Scopus, PubMed/Medline, Cochrane library, Embase, and Web of Science. Among the 394 identified articles, 17 papers were selected for inclusion. Most of these studies have been conducted in regions with low herbicide concentrations, including Spain, Greece, Canada, Brazil, Hungary, Malawi, Portugal, Lesotho, Germany, Serbia, and the USA. The high-level alachlor, metolachlor, atrazine, metribuzin, and simazine herbicides in groundwater were detected in Portugal (0.4-13μg/L). An overview of studies demonstrated that herbicides are widely used in water resources, and surface waters are more contaminated than groundwaters.