Martins, CarlaTeófilo, VâniaClemente, MartaCorda, MarianaFermoso, JoseAguado, AliciaRodriguez, SandraMoshammer, HannsKristian, AlexandraFerri, MireiaCosta-Ruiz, BelénPérez, LeticiaHanke, WojciechBadyda, ArturKepa, PiotrAffek, KatarzynaDoskocz, NinaMartín-Torrijos, LauraMulayim, Mehmet OguzMartinez, Cesar MediavillaGómez, AlbaGonzález, RubenCano, IsaacRoca, Josepde Leede, SimonViegas, Susana2025-05-202025-05-202025-02-100048-9697PURE: 116461291PURE UUID: 81ae9047-c8bb-4fa9-858d-240a892ff61aScopus: 85215585749PubMed: 39855122http://hdl.handle.net/10362/183241Funding Information: This systematic review has been performed in the framework of the K-HEALTHinAIR project funded by the European Union (Grant agreement ID: 101057693). Publisher Copyright: © 2025 The AuthorsClean air is a requirement for life, and the quality of indoor air is a health determinant since people spend most of their daily time indoors. The aim of this study was to systematically review the available evidence regarding the sources, determinants and concentrations of indoor air pollutants in a set of scenarios under study in K-HEALTHinAIR project. To this end, a systematic review was performed to review the available studies published between the years 2013–2023, for several settings (schools, homes, hospitals, lecture halls, retirement homes, public transports and canteens), conducted in Europe, where sources and determinants of the indoor pollutants concentrations was assessed. After a two-stage screening in abstract and full-text, 148 papers were included for data extraction. For particulate matter, carbon dioxide and volatile organic compounds, several emission sources were identified (occupancy, human activities, resuspension, cleaning products, disinfectants, craft activities, cooking, smoking), with ventilation, number of occupants, building characteristics, being considered as important determinants. This review made also possible to discuss some of the actions that are already in place or should be implemented in the future to prevent and control the presence of pollutants indoors.2333238engEuropeIndoor air qualityIndoor pollutantsSources of exposureEnvironmental EngineeringEnvironmental ChemistryWaste Management and DisposalPollutionSDG 3 - Good Health and Well-beingreview10.1016/j.scitotenv.2025.178574https://www.scopus.com/pages/publications/85215585749