Baseline Investigation on Residential PM 2.5 Pollution of General Living Scenarios — 12 Cities, China, 2018

What is already known about this topic? Residential air pollution can cause a large disease burden, and residential air quality is directly influenced by residential fine particulate matter (PM2.5). Residential PM2.5 pollution is of critical concern in China given that the characteristics and influencing factors of residential PM2.5 in China are not clear. What is added by this report? This study focuseed on residential PM2.5 concentration of 12 cities with the on-site investigation in 2018, and provided the latest characteristics and potential influencing factors of residential PM2.5 under general living scenarios in China. What are the implications for public health practice? This study suggested that the control of residential PM2.5 pollution should be reinforced with revised indoor air quality standards under obvious spatial diversity.