Changes in Indoor Air Quality in Public Facilities before and after the Enactment of Taiwan’s Indoor Air Quality Management Act

Figure 4

Concentrations of ozone in indoor environments and the corresponding attainment rates. H: hospital; L: library; S: school; ER: exhibition room; GO: government office; PS: preschool; DSC: department store/shopping center; PTS: public transport system; SWI: social welfare institution.