RT Journal Article T1 First nation-wide estimation of tobacco consumption in Spain using wastewater-based epidemiology A1 Montes Goyanes, Rosa A1 Rodil Rodríguez, María del Rosario A1 Rico, Andreu A1 Cela Torrijos, Rafael A1 González Mariño, Iria A1 Hernández, Félix A1 Bijlsma, Lubertus A1 Celma, Alberto A1 Picó, Yolanda A1 Andreu, Vicente A1 López de Alda, Miren A1 López-García, Ester A1 Postigo, Cristina A1 Pocurull, Eva A1 Marcé, Rosa María A1 Rosende, María A1 Olivares, Maitane A1 Valcárcel, Yolanda A1 Quintana Álvarez, José Benito K1 Nicotine K1 Nation wide monitoring K1 Sewage surveillance K1 Addiction AB Wastewater-based epidemiology (WBE) has become a very useful tool to monitor a population's drug consumption or exposure to environmental and food contaminants. In this work, WBE has been applied to estimate tobacco consumption in seven Spanish regions. To this end, 24 h composite wastewater samples were taken daily for one week in 17 wastewater treatment plants, covering altogether a population of ca. 6 million inhabitants. The samples were treated by enzymatic deconjugation and the wastewater content of two human-specific nicotine metabolites (namely, cotinine and trans-3′-hydroxycotinine) was measured to estimate the daily consumption of nicotine. The population-weighted average nicotine consumption in the seven analyzed regions was 2.2 g/(day∙1000 inh.), without any daily pattern. This average estimated nicotine consumption value agreed with the value derived from official tobacco sales data. Differences in consumption among the seven studied regions were found, being Galicia, the region with the lowest rate, and the Basque Country and Catalonia those with the highest rates. However, no conclusive correlation was found between those values and the prevalence data taken from two different national surveys, nor sociodemographic and health data. This study demonstrates that this tool can complement other indicators in order to accurately assess tobacco consumption rates at regional and national levels and provides the most extensive application of the approach in the Spanish territory. PB Elsevier SN 0048-9697 YR 2020 FD 2020 LK http://hdl.handle.net/10347/26047 UL http://hdl.handle.net/10347/26047 LA eng NO Science of the Total Environment, 741 (2020), 140384. https://doi.org/10.1016/j.scitotenv.2020.140384 NO This study was supported by MINECO/AEI projects (CTM2016-81935-REDT, CTM2017-84763-C3-2-R, CTM2017-84763-C3-1-R, CTM2017-84763-C3-3-R), MICINN project (CEX2018-000794-S), Galician Council of Culture, Education and Universities (ED481D 2017/003 and ED431C2017/36), cofunded by FEDER/ERDF DS Minerva RD 27 abr 2026