The concentrations of PM10 and PM2. 5 were measured during 2 weeks at an underground
station in central Stockholm. The instrument, an automatic TEOM monitor (Tapered Element
Oscillating Microbalance), was placed on the platform in the centre of the station. During
weekdays between 7 am and 7 pm the average PM10 and PM2. 5 concentrations were 470
and 260 μg/m 3, respectively. These levels are a factor 5 and 10 times higher than the
corresponding values measured in one of the busiest streets in central Stockholm. The …

The concentrations of PM10 and PM2. 5 were measured during 2 weeks at an underground
station in central Stockholm. The instrument, an automatic TEOM monitor (Tapered Element
Oscillating Microbalance), was placed on the platform in the centre of the station. During
weekdays between 7 am and 7 pm the average PM10 and PM2. 5 concentrations were 470
pg/m3 and 260 pg/m3, respectively. These levels are a factor 5 and 10 times higher than the
corresponding values measured in one of the busiest streets in central Stockholm. The …