Table 2.

Domestic radon concentrations and action levels in different countries [26].

No.	Country	Average radon concentration in homes (Bq/m3)	Action level (Bq/m3)	Year set
1	Austria	∗	200	1990
2	Finland	123	400	1992
3	Belgium	∗	400	1995
4	China	∗	100–200	—
5	Greece	∗	200–400	—
6	Germany	50	250	1988
7	Ireland	60	200	1991
8	Israel	∗	200	—
9	Lithuania	37	100	—
10	Luxembourg	∗	250	1992
11	Norway	51–60	200	1990
12	Poland	∗	400	1994
13	Ireland	∗	200	1991
14	Sweden	108	400	1994
15	Switzerland	70	1000	1994
16	United Kingdom	20	200	1990
17	European community	∗	400	—
18	USA	46	150	1994
19	Canada	∗	800	1988

^∗Not available at the moment.