Barbieri, Diego MariaLou, BaowenPassavanti, MarcoHui, CangLessa, Daniela AntunesMaharaj, BrijBanerjee, ArunabhaWang, FusongChang, KevinNaik, BhavenYu, LeiLiu, ZhuangzhuangSikka, GauravTucker, AndrewMirhosseini, Ali ForoutanNaseri, SahraQiao, YaningGupta, AkshayAbbas, Montasir M.Fang, KevinGhasemi, NavidPeprah, PrinceGoswami, ShubhamHessami, AmirAgarwal, NithinLam, LouisaAdomako, Solomon2021-09-072021-09-072020-10-012352-3409PMC7425542106169 (PII)http://hdl.handle.net/10919/104937The dataset deals with the air quality perceived by citizens before and during the enforcement of COVID-19 restrictions in ten countries around the world: Australia, Brazil, China, Ghana, India, Iran, Italy, Norway, South Africa and the United States. An online survey conveniently translated into Chinese, English, Italian, Norwegian, Persian, Portuguese collected information regarding the perceived quality of air pollution according to a Likert scale. The questionnaire was distributed between 11-05-2020 and 31-05-2020 and 9 394 respondents took part. Both the survey and the dataset (stored in a Microsoft Excel Worksheet) are available in a public repository. The collected data offer the people's subjective perspectives related to the objective improvement in air quality occurred during the COVID-19 restrictions. Furthermore, the dataset can be used for research studies involving the reduction in air pollution as experienced, to a different extent, by populations of all the ten countries.Pages 106169application/pdfenCreative Commons Attribution 4.0 InternationalAir qualityCOVID-19Environmental pollutionPsychometric perceptionSurvey dataArticle2021-09-07https://doi.org/10.1016/j.dib.2020.10616932Abbas, Montasir [0000-0002-9938-0255]328350422352-3409