Objectives To understand the sanitary quality of air in underground stations of No. 1 metro line in Nanchang before operation, and to provide scientific evidence and suggestion for hygienic administration as well as disease control and prevention.
Methods Air samples were randomly selected from 12 stations of No. 1 metro line in Nanchang during October to December in 2015. Indicators for air quality, such as carbon dioxide, carbon monoxide, formaldehyde, inhalable particulates, noise, illumination and bacteria indexes, were detected. The sanitary quality of the air was evaluated according to the requirements of the National Hygienic Standard for Public Transport Waiting Room (GB 9672-1996).
Results Carbon monoxide and carbon dioxide in the waiting area (platform and station hall) of subway stations showed the qualified rates of formaldehyde, inhalable particulates, noise, illumination and air bacteria index were 99.07%, 100%, 36.57%, 100% and 91.39% in platforms and 100%, 97.69%, 51.85%, 99.07% and 99.72% respectively in station halls.
Conclusions The sanitary quality of the air in underground stations of No. 1 metro line in Nanchang was quite well, but should devote much attention to the platform and hall of stations.
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