Figure 4

Average 1-day indoor concentrations of particulate matter
  BA IT RS SK AL HU DK IT FR NO SE
SEARCH study 102 82 81 80 69 56          
HESE study             169 153 112 54 33
Figure 4 – Average 1-day indoor concentrations of particulate matter with an aerodynamic diameter <10 μm (PM 10 ) measured in classrooms in various European countries. The line at 50 μg·m -3 represents the US Environmental Protection Agency annual standard. SEARCH: School Environment And Respiratory Health of Children; HESE: Health Effects of School Environment. Download Raw Data

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