Municipalities requiring radon measurements in workplaces

High concentrations of radon in workplaces can be predicted based on radon measurements made in apartments.

According to instruction ST 12.1, radon concentration in workplaces must be determined in areas where the average annual radon concentration in at least 10 per cent of low-rise residential buildings exceeds the value of 400 Bq/m³. Attached is a list of all such municipalities in alphabetical order.

The measurement requirement does not apply to workplaces where the radon concentration can be assumed to be less than 400 Bq/m³ due to the location or construction of the premises or for another similar reason. For example, radon concentration does not need to be measured in workplaces located on the second floor of the building or higher.

In addition to the attached list of municipalities, radon concentration must be measured in workplaces throughout the country if they are located on ridges or very air-permeable gravel or sand formations. Radon concentration must also be measured in all workplaces located underground in which work is done on a regular basis.

The list has been updated in February 2016 and is based on the list of municipalities at that time. The list includes those municipalities in which ten or more measurements have been made.

Municipality Low-rise
residential
buildings
measured
Average Proportion
exceeding
400 Bq/m³
Asikkala 705 286 17
Askola 533 473 27
Enontekiö 65 299 20
Hamina 1261 265 17
Hattula 519 229 12
Hausjärvi 802 270 16
Heinola 1266 257 17
Hollola 3269 439 33
Humppila 111 471 24
Hyvinkää 2166 250 12
Hämeenlinna 2965 230 13
Iitti 424 297 14
Imatra 835 226 12
Janakkala 1739 338 18
Järvenpää 1708 237 15
Kajaani 801 414 21
Kangasala 1750 280 15
Kauniainen 543 208 14
Kitee 466 245 13
Kittilä 95 168 11
Kivijärvi 46 234 11
Kolari 145 322 17
Kotka 3025 321 27
Kouvola 4946 298 21
Kuhmoinen 207 252 14
Kärkölä 586 362 28
Lahti 4963 442 29
Lapinjärvi 356 409 29
Lappeenranta 2049 205 10
Lemi 152 267 17
Lempäälä 999 269 19
Loppi 709 273 14
Loviisa 2203 481 35
Luhanka 52 230 19
Luumäki 431 319 26
Miehikkälä 162 297 22
Myrskylä 241 419 26
Mäntsälä 946 306 20
Nokia 1307 239 16
Orimattila 1340 342 18
Padasjoki 220 276 19
Parikkala 280 214 16
Pornainen 440 239 13
Porvoo 2201 259 15
Pukkila 269 361 19
Pyhtää 518 451 31
Pälkäne 397 245 14
Riihimäki 1083 228 11
Ruokolahti 455 228 12
Ruovesi 216 433 19
Savitaipale 482 307 22
Sodankylä 245 238 10
Taipalsaari 968 461 38
Tammela 308 286 16
Tampere 5550 377 20
Tohmajärvi 209 223 10
Valkeakoski 587 196 11
Virolahti 210 283 20
Ylöjärvi 2016 225 12

 

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  • Kojo Katja
    Inspector tel. +358975988472