title: Indoor Air Quality in the Metro System in North Taiwan.
abstract: Indoor air pollution is an increasing health concern, especially in enclosed environments such as underground subway stations because of increased global usage by urban populations. This study measured the indoor air quality of underground platforms at 10 metro stations of the Taipei Rapid Transit system (TRTS) in Taiwan, including humidity, temperature, carbon monoxide (CO), carbon dioxide (CO₂), formaldehyde (HCHO), total volatile organic compounds (TVOCs), ozone (O₃), airborne particulate matter (PM10and PM2.5), bacteria and fungi. Results showed that the CO₂, CO and HCHO levels met the stipulated standards as regulated by Taiwan's Indoor Air Quality Management Act (TIAQMA). However, elevated PM10and PM2.5levels were measured at most stations. TVOCs and bacterial concentrations at some stations measured in summer were higher than the regulated standards stipulated by Taiwan's Environmental Protection Administration. Further studies should be conducted to reduce particulate matters, TVOCs and bacteria in the air of subway stations.
authors.affiliation: Institute of Environmental and Occupational Health Sciences, School of Medicine, National Yang Ming University, Taipei 11221, Taiwan. e23364@mail.trtc.com.tw.
authors.forename: Ying-Yi
authors.initials: YY
authors.lastname: Chen
authors.affiliation: Management Office for Health Data, China Medical University Hospital, Taichung 40402, Taiwan. fcsung1008@yahoo.com.|Department of Health Services Administration, College of Public Health, China Medical University, Taichung 40402, Taiwan. fcsung1008@yahoo.com.
authors.forename: Fung-Chang
authors.initials: FC
authors.lastname: Sung
authors.affiliation: Institute of Environmental and Occupational Health Sciences, School of Medicine, National Yang Ming University, Taipei 11221, Taiwan. mlchen@ym.edu.tw.
authors.forename: Mei-Lien
authors.initials: ML
authors.lastname: Chen
authors.affiliation: Department of Occupational Safety and Health, Chung Shan Medical University, Taichung 40201, Taiwan. ifmao@csmu.edu.tw.|Department of Medical Research, Chung Shan Medical University Hospital, Taichung 40201, Taiwan. ifmao@csmu.edu.tw.
authors.forename: I-Fang
authors.initials: IF
authors.lastname: Mao
authors.affiliation: Department of Sport and Health Management, Da-Yeh University, No.168, University Rd., Dacun, Changhua 51591, Taiwan. chungyen@mail.dyu.edu.tw.|School of Post-Baccalaureate Chinese Medicine, China Medical University, Taichung 40402, Taiwan. chungyen@mail.dyu.edu.tw.
authors.forename: Chung-Yen
authors.initials: CY
authors.lastname: Lu
mesh_terms: D000391:Air Microbiology; D000393:Air Pollutants / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis / Q000706:statistics & numerical data*; D001419:Bacteria / Q000302:isolation & purification; D002947:Cities; D004784:Environmental Monitoring / Q000379:methods; D005658:Fungi / Q000302:isolation & purification; D011890:Railroads; D013624:Taiwan
chemical_list: D000393:Air Pollutants
keywords: indoor air; metro; particulate matter; subway; transit