Dust is a significant source of human exposure to chemicals: the airborne fine particulates present an inhalation risk while coarser material which deposits as dust fall is a risk from ingestion (Christoforidis and Stamatis, 2009 and Shi et al., 2011), especially for infants and children who are more prone to transferring Vandetanib from hand to mouth (Glorennec et al., 2012). Persons afflicted with pica are particularly at risk from dust ingestion. Chemicals in dust fall also represent a source of contamination to crops and vegetables (Smith et al., 2004 and Shi et al., 2007) and are thus potential sources for consumers of these foods (Lee et al., 2012 and Asami et al., 2013). Not much is known about the presence of perchlorate in dust fall. Recent work from China (Gan et al., 2014) reports perchlorate in dust collected shortly after the New Year celebrations during February–March 2013 and found values ranging from 0.132 to 5300 μg g− 1, but these results pertained to dust settled on window sills or building surfaces in several cities.