Table 4.
Summary of the main results in previous studies conducted in recent years in schools or daycare centers regarding indoor radon measurements. AM = Arithmetic mean, GM = Geometric mean.
| Country | Type of Study | Average (AM) Radon Level Bq/m3 | Average (GM) Radon Level Bq/m3 |
|---|---|---|---|
| Finland (this study) | Daycare centers and schools | 82 (Schools), 86 (Daycare centers) | 42 (Schools), 39 (Daycare centers) |
| Portugal (Porto and Bragança district) [7] | Nurseries, primary, and preschools | 62 (Porto), 193 (Bragança) | 47 (Porto), 147 (Bragança) |
| Turkey [8] | Primary schools | 49 | 42 |
| Serbia [9] | Primary schools | 119 | - |
| Bulgaria [10] | Kindergartens | 132 | 101 |
| Republic of Macedonia [11] | Schools | 88 | 76 |
| Czech Republic [12] | Schools | 204 (reconstruction), 149 (non-reconstruction) | - |
| Hungary, Poland and Slovakia [13] | Kindergartens | 233 (Hungary), 90 (Poland), 317 (Slovakia) | 231 (Hungary), 78 (Poland), 214 (Slovakia) |
| Russia [14] | Kindergartens | 59 | 42 |
| South Italy [15] | Schools | 215 | - |
| Italy [16] | Schools | - | 92 (median only reported) |
| Korea [17] | Schools | 97 (spring semester), 158 (autumn semester) | - |
| Bosnia and Herzegovina [18] | Schools | 128 | 99 |
| Kosovo [19] | Schools | 198 | - |
| Saudi Arabia (Riyadh) [20] | Schools | 17 | 17 |
| Serbia (Kragujevac city) [21] | Schools and kindergartens | 60 | - |
| Sudan [22] | Schools | 59 | - |
| Switzerland [23] | Schools | 158 | - |
| Portugal [24] | Schools | 197 | 197 |