Table 1.
Concentrations of indoor air radon at groundwater treatment plants in Finnish municipalities in 2020.
| Municipalities | Min. | Max. | Above reference level (%) | Hospital districts | University hospital districts | |
|---|---|---|---|---|---|---|
| 1 | Eura | 39 | 693 | 50 | Satakunta | TYKS |
| 2 | Forssa | 14 | 376 | 17 | Kanta-Häme | TAYS |
| 3 | Haapajärvi | 3930 | 3,930 | 100 | Northern Ostrobothnia | OYS |
| 4 | Hanko | 7 | 7,384 | 23 | Uusimaa | HYKS |
| 5 | Harjavalta | 45 | 701 | 25 | Satakunta | TYKS |
| 6 | Hattula | 33 | 2,630 | 50 | Kanta-Häme | TAYS |
| 7 | Hausjärvi | 448 | 1,780 | 100 | Kanta-Häme | TAYS |
| 8 | Hollola | 120 | 5,340 | 65 | Päijät-Häme | HYKS |
| 9 | Honkajoki | 184 | 465 | 50 | Satakunta | TYKS |
| 10 | Huittinen | 52 | 160 | 0 | Satakunta | TYKS |
| 11 | Hyvinkää | 28 | 1,100 | 25 | Uusimaa | HYKS |
| 12 | Hämeenlinna | 15 | 3,620 | 69 | Kanta-Häme | TAYS |
| 13 | Iitti | 6720 | 6,720 | 100 | Päijät-Häme | HYKS |
| 14 | Imatra | 68 | 1,267 | 67 | South Karelia | HYKS |
| 15 | Janakkala | 33 | 9,928 | 29 | Päijät-Häme | TAYS |
| 16 | Joensuu | 41 | 21,257 | 64 | North Karelia | KYS |
| 17 | Joutsa | 192 | 1,697 | 67 | Central Finland | KYS |
| 18 | Jyväskylä | 131 | 1,572 | 50 | Central Finland | KYS |
| 19 | Kajaani | 4 | 847 | 20 | Kainuu | OYS |
| 20 | Kalajoki | 289 | 1,686 | 80 | Northern Ostrobothnia | OYS |
| 21 | Kangasala | 64 | 8,026 | 72 | Tampere region | TAYS |
| 22 | Kankaanpää | 358 | 399 | 100 | Satakunta | TYKS |
| 23 | Karvia | 1567 | 1,567 | 100 | Satakunta | TYKS |
| 24 | Kitee | 2 | 1,312 | 29 | North Karelia | KYS |
| 25 | Kontiolahti | 124 | 14,935 | 80 | North Karelia | KYS |
| 26 | Kouvola | 16 | 6,370 | 62 | Kymenlaakso | HYKS |
| 27 | Kuopio | 5 | 4,740 | 27 | Northern Savo | KYS |
| 28 | Lahti | 10 | 2,100 | 69 | Päijät-Häme | HYKS |
| 29 | Lappeenranta | 60 | 6,260 | 73 | South Karelia | HYKS |
| 30 | Laukaa | 35 | 6,451 | 43 | Central Finland | KYS |
| 31 | Leppävirta | 180 | 3,530 | 86 | Northern Savo | KYS |
| 32 | Miehikkälä | 294 | 294 | 0 | Kymenlaakso | HYKS |
| 33 | Mäntsälä | 17 | 348 | 20 | Uusimaa | HYKS |
| 34 | Mäntyharju | 2101 | 4,976 | 100 | Southern Savo | KYS |
| 35 | Nakkila | 95 | 95 | 0 | Satakunta | TYKS |
| 36 | Nokia | 95 | 540 | 50 | Tampere region | TAYS |
| 37 | Nurmes | 2253 | 2,955 | 100 | North Karelia | KYS |
| 38 | Nurmijärvi | 290 | 1,120 | 50 | Uusimaa | HYKS |
| 39 | Orimattila | 1663 | 6,130 | 100 | Päijät-Häme | HYKS |
| 40 | Orivesi | 765 | 1,071 | 100 | Tampere region | TAYS |
| 41 | Outokumpu | 355 | 1,186 | 100 | North Karelia | KYS |
| 42 | Parikkala | 111 | 582 | 50 | South Karelia | HYKS |
| 43 | Pori | 8 | 10 | 0 | Satakunta | TYKS |
| 44 | Pornainen | 221 | 613 | 50 | Uusimaa | HYKS |
| 45 | Pukkila | 110 | 202 | 0 | Päijät-Häme | HYKS |
| 46 | Riihimäki | 39 | 440 | 33 | Kanta-Häme | TAYS |
| 47 | Rovaniemi | 880 | 31,600 | 100 | Lapland | OYS |
| 48 | Sievi | 780 | 10,610 | 100 | Northern Ostrobothnia | OYS |
| 49 | Siikainen | 69 | 266 | 0 | Satakunta | TYKS |
| 50 | Siilinjärvi | 136 | 3,013 | 71 | Northern Savo | KYS |
| 51 | Sipoo | 5690 | 5,690 | 100 | Uusimaa | HYKS |
| 52 | Säkylä | 212 | 237 | 0 | Satakunta | TYKS |
| 53 | Tampere | 27 | 10,360 | 72 | Tampere region | TAYS |
| 54 | Tohmajärvi | 20 | 8,964 | 50 | North Karelia | KYS |
| 55 | Tuusniemi | 10420 | 10,550 | 100 | Northern Savo | KYS |
| 56 | Tuusula | 80 | 530 | 33 | Uusimaa | HYKS |
| 57 | Ulvila | 129 | 1,935 | 67 | Satakunta | TYKS |
| 58 | Valtimo | 530 | 530 | 100 | North Karelia | KYS |
| 59 | Ylöjärvi | 140 | 14130 | 63 | Tampere region | TAYS |
Source: STUK report 2020.