List of Radon Level by Country (Please send comments and corrections to: Jan_Zielinski@hc-sc.gc.ca)
Country Name	WHO Code	ISO	Population 106 a	AM	GM	GSD	Max	Classification of AMb	Source	OriginalReference for AM, possibly GM, GSD, Max
Armenia	4007	ARM	3.02	104		1.3	216		UNSCEAR 2000 report
China	3068	CHN	1315.84	43.8	34.4		596	CWA	UNSCEAR 2006 survey	Shang, B., D. Xu, H. Cui, L. Zhang, B. Chen, J. Wu, Y. Wang, Y. Gao, Z. Li and Q. Sun. Radon Levels Survey in Residences in China. National Institute for Radiological Protection, China (2006).
China, HK		CNH	7.04	41			140		UNSCEAR 2000 report	Tso, M.W. and J.K.C. Leung. Survey of indoor 222Rn concentrations in Hong Kong. Health Phys. 60: 237-241 (1991).
China, Taiwan	3070	CNT	22.89	10	8.5	0.6	63.5	RA	UNSCEAR 2004 survey	Chen C.J.,Liu C.C., Lin, Y.M. Surveillance of indoor and outdoor radon concentrations in Taiwan. Nucl. Sci. J. 31(2),117-128 (1994) (in Chinese).
Cyprus	3080	CYP	0.84	7	7	2.6	78		UNSCEAR 2000 report	Christofides, S. and Christodoulides, G. Airborne 222Rn concentration in Cypriot houses. Health Physics. 1993 Apr; 64(4):392-396; and  Anastasiou, T.; Tsertos, H.; Christofides, S., and Christodoulides, G. Indoor radon (222Rn) concentration measurements in Cyprus using high-sensitivity portable detectors. Journal of Environmental Radioactivity. 2003; 68(2):159-69.
India	3100	IND	1103.37	57	42	2.2	210		UNSCEAR 2000 report	Subba Ramu, M. C.; Shaikh, A. N.; Muraleedharan, T. S.; Ramachandran, T. V., and Nambi, K. S. V. Environmental radon monitoring in India: a plea for national effort. S. Kumar S. and A. R. Reddy  , eds. Proceedings of the National Conference on Particle Tracks in Solids, Jodhpur, India, 9-11 October 1991.:  Jodhpur, India: Defense Laboratory ; 1991: 11.
Indonesia	3110	IDN	222.78	35.1	35.1	1.2	165	CWA	UNSCEAR 2001 survey	Bunawas, S. and Warsona, A.  Distribution of Radon Concentration in Dwelling and Lung Cancer Risk.  Proceedings  of  The National Scientific Meeting on Safety, Health and Environment. 23-24 October 2001  ; Jakarta, Indonesia.  2001.
Iran	3130	IRN	69.52	82			3070	CWA	UNSCEAR 2002 survey
Israel	3150	ISR	7.15	47				CWA	WWW	Haquin G. etal. Radon Survey of Israel. Proceeding of the Conference of Nuclear Societies in Israel, Dead Sea, February 2006.
Japan	3160	JPN	128.08	16	13	1.8	208		UNSCEAR 2000 report	Fujimoto, K., S. Kobayashi, M. Uchiyama et al. Nationwide indoor radon survey in Japan. Hoken Butsuri 32: 41-51 (1997);    Sanada, T., K.Fujimoto, K.Miyano et al. Measurements of nationwide indoor radon concentration in Japan. Environ. Radioact. 45(2): 129-137 (1999)
Kazakhstan	4182	KAZ	14.83				5000	CWA	UNSCEAR 2001 survey
Kuwait	3190	KWT	2.69	14	10.6	0.7	119.2	CWA	UNSCEAR 2005 survey
Malaysia	3236	MYS	27.25	14			20		UNSCEAR 2000 report
Pakistan	3290	PAK	157.94	30			83		UNSCEAR 2000 report	Tufail, M., M. Amin, W. Akhtar et al. Radon concentration in some houses of Islamabad and Rawalpindi, Pakistan. Nucl. Tracks Radiat. Meas. 19: 429-430 (1991).
Palestine		PSE	0.40	34			105		UNSCEAR 2006 survey	Yassin, S. S. and Steck, D. J. A preliminary survey of radon and radon progeny concentrations throughout the Gaza Strip in Palestine.  W. Burkart; M. Sohrabi, and A. Bayer, eds.  Proceedings of the 5th International Conference on High Levels of Natural Radiation and Radon Areas: Radiation Dose and Health Effects. Munich. 4-7 September 2000.Amsterdam, Netherlands: Elsevier ; 2002  ICS 1225.
Philippines	3300	PHL	83.05	23	22	1.1	62	CWA	UNSCEAR 2001 survey	Info provided in UNSCEAR Survey 2006 is problematic
Russia	4272	RUS	143.20	55					WHO 2007 survey
Saudi Arabia	3340	SAU	24.57	16			36		UNSCEAR 2006 survey	Abu-Jarad, F. and Al-Jarallah, M. I. Radon in Saudi Houses. Radiation Protection Dosimetry. 1986; 14(3):243-249.
South Korea	3325	KOR	48.85	53.4	43.3	1.8	1350	CWA	UNSCEAR 2001 survey	Kim, C. K.; Lee, S. C.; Lee, D. M.; Chang, B. U.; Rho, B. H., and Kang, H. D. Nationwide survey of radon levels in Korea. Health Physics. 2003 Mar; 84(3):354-360.
Syria	3370	SYR	19.04	44			520		UNSCEAR 2000 report	Othman, I., M. Hushari, G. Raja et al. Radon in Syrian houses. J. Radiol. Prot. 16(1): 45-50 (1996).
Thailand	3380	THA	64.23	23	16	1.2	480		UNSCEAR 2000 report
a Data are estimates for July 2005, taken from the United Nations World Populations Prospects Report (2004 revision).
b CWA - Country Wide Average;  RA - Regional Average.