Airthings Corentium Home
approx. 140–150 €- Shows the short-term and long-term average
- No app or internet connection
- Can be moved from room to room
Measurement season under way 1.9.–31.5.
Radon measurement for your home, cottage and workplace
Radon is an odourless, invisible gas that can only be detected by measuring. See how much radon has been measured in your municipality, compare detectors and request a quote for measurement or remediation.
141 municipalities with measurements recorded in at least two years.
Radon by municipality
The average found in measured homes across the country has been 225 Bq/m³, and 19.9% of the measured homes exceeded 300 Bq/m³ (average of statistics for 2000–2023). The figures describe measured homes: most measurements have been made in areas where radon is known to occur, so the average is higher than the average of all homes (about 94 Bq/m³ according to STUK). The only way to know the level in your own home is to measure.
Akaa 198Asikkala 331Askola 432Espoo 155Forssa 140Hamina 289Hankasalmi 82Hanko 81Hartola 171Hattula 264Hausjärvi 329Heinola 295Helsinki 158Hollola 446Humppila 264Hyvinkää 291Hämeenkyrö 193Hämeenlinna 235Iisalmi 69Iitti 225Ikaalinen 134Ilmajoki 64Ilomantsi 131Imatra 228Inari 70Inkoo 124Janakkala 340Joensuu 221Jokioinen 204Joroinen 85Jyväskylä 160Jämsä 158Järvenpää 271Kaarina 69Kajaani 503Kangasala 317Kangasniemi 116Karkkila 209Kauniainen 185Kerava 195Keuruu 135Kirkkonummi 158Kitee 347Kiuruvesi 91Kokkola 41Kontiolahti 116Kotka 329Kouvola 284Kuhmoinen 165Kuopio 77Kurikka 75Kärkölä 404Lahti 393Laitila 139Lapinjärvi 439Lappeenranta 209Laukaa 169Lemi 252Lempäälä 259Leppävirta 86Lieto 74Liperi 187Lohja 155Loimaa 117Loppi 262Loviisa 486Luumäki 344Mariehamn 157Masku 86Miehikkälä 291Mikkeli 124Mustasaari 44Muurame 117Mynämäki 129Myrskylä 458Mäntsälä 271Naantali 88Nokia 254Nurmes 158Nurmijärvi 174Närpes 41Orimattila 364Orivesi 132Oulu 48Outokumpu 177Padasjoki 294Parainen 70Parikkala 262Petäjävesi 136Pirkkala 181Polvijärvi 118Pori 59Pornainen 274Porvoo 243Pukkila 319Pyhtää 392Pälkäne 395Raasepori 147Raisio 118Rauma 93Rautalampi 81Riihimäki 255Rovaniemi 161Ruokolahti 358Ruovesi 661Rusko 113Salla 123Salo 124Sastamala 135Savitaipale 337Savonlinna 90Seinäjoki 133Siilinjärvi 56Sipoo 149Siuntio 151Sodankylä 144Somero 154Suonenjoki 70Sysmä 202Taipalsaari 422Tammela 240Tampere 332Tervo 58Teuva 81Toivakka 197Turku 95Tuusula 205Uurainen 215Uusikaupunki 195Vaasa 50Valkeakoski 233Vantaa 181Varkaus 122Vesanto 96Vesilahti 151Vihti 110Virolahti 316Virrat 139Ylitornio 198Ylöjärvi 238Äänekoski 152
Meters: digital or laboratory measurement?
The laboratory measurement is the official annual average. A digital meter shows the concentration immediately and continuously, so you can see, for example, the effect of a repair or the situation in a cottage. Prices are price-comparison levels as of 10/2026 and may change.
Airthings Wave Radon
from about 173 €- Radon, temperature and humidity
- History and alerts in the app
- Wall or ceiling installation
STUK radon measurement canister
According to STUK's price list- Result as an annual average from the laboratory
- Suitable for comparison with the authorities and for property transactions
- Measurement for at least 2 months during the measurement season
Interpret the measurement result
How the measurement is done
- Date
Measure between 1.9. and 31.5., when the result best matches the annual average. - Duration
At least two months, preferably three or more. - Places
Usually two meters: living room and bedroom, on the lowest residential floor. - Result
Compare the annual average with the reference value of 300 Bq/m³. If it is exceeded, the radon is remediated.
Result above the reference value? How radon is remediated
The most common remedies are a radon blower or well, sealing the base floor and penetrations, and adjusting ventilation. The most effective method depends on the house and the soil, so the repair should be planned with a professional and measured again afterwards. The labour part of the repair work may qualify for the household deduction.
Request to be contacted
Tell us about the property and we will find a radon measurement or remediation company for you and pass your request on to it with your consent. The request is free of charge and non-binding. You can also order a home measurement yourself right away From STUK or a measurement service approved by STUK.
Frequently asked questions
What is the radon reference level?
The reference value for the annual average radon concentration in a home's indoor air is 300 Bq/m³. For new construction the design value is 200 Bq/m³ (STUK).
When should radon be measured?
The measurement season is 1.9.–31.5., and the measurement must last at least two months. Two meters are usually used: one in the living room and one in the bedroom.
Which is better, a digital meter or a STUK canister?
STUK's laboratory measurement gives the official annual average. A digital meter shows the concentration continuously and suits monitoring, checking the effect of a repair and a cottage. A consumer meter is not an official measurement.
How dangerous is radon?
According to STUK, after smoking radon is the most significant cause of lung cancer: in Finland about 150–270 lung cancer cases a year are linked to radon.