“…This work focuses on 18 biocides, which were previously prioritized (Paijens et al 2019) according to (i) their use in urban areas, and especially as preservatives in building materials such as paints, renders, wood or bitumen membranes, (ii) their emission into runoff and the receiving waters, and (iii) their risk for aquatic organisms: diuron, isoproturon, methylisothiazolinone (MIT), benzisothiazolinone (BIT), chloromethylisothiazolinone (CMIT), octylisothiazolinone (OIT), dichloro-octylisothiazolinone (DCOIT), benzalkonium compounds (BZK C12-C16), terbutryn, cybutryn (irgarol 1051), terbuthylazine, carbendazim, iodopropynyl butylcarbamate (IPBC), thiabendazole, tebuconazole and mecoprop. A state-of-the-art review (Paijens et al 2020) identified many knowledge gaps, preventing the full assessment of the risks associated with biocides originating from buildings. Most of these biocides are also used as plant protection products and thus have been monitored in rural areas but more rarely in urban waters (Paijens et al 2020).…”