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
Argentina	2020	ARG	38.75	40			286	CWA	WHO 2007 survey	Canoba, A., López, F. O., Arnaud, M. I., Oliveira, A. A. , Neman, R. S., Hadler, J. C., Iunes, P. J., Paulo, S. R., Osorio, A. M., Aparecido, R., Rodríguez, C., Moreno, V., Vasquez, R., Espinosa, G., Golzarri, J. I. , Martínez, T., Navarrete, M., Cabrera, I., Segovia, N., Peńa, P., Taméz, E., Pereyra, P., López-, Herrera, M. E., and Sajo-Bohus, L. 2002. Indoor radon measurements in six Latin American countries. Geofisica Internacional 41:453-457.
Brazil	2070	BRA	186.40	81.95			310		UNSCEAR 2006 survey	Canoba A. etal. Indoor radon measurements in six Latin American countries. Geofisica Internacional 41(4):453-457, 2002.
Chile	2120	CHL	16.30	25			86		UNSCEAR 2000 report	Stuardo, E. Natural radiation measurements in Chile. Radiation Protection Dosimetry. 1996; 67(2):129-133..
Ecuador	2180	ECU	13.23	94			226	CWA	WHO 2007 survey	Canoba A. etal. Indoor radon measurements in six Latin American countries. Geofisica Internacional 41(4):453-457, 2002.
Paraguay	2360	PRY	6.16	28			51		UNSCEAR 2000 report
Peru	2370	PER	27.97	32.29			50.2		UNSCEAR 2006 survey	Canoba A. etal. Indoor radon measurements in six Latin American countries. Geofisica Internacional 41(4):453-457, 2002.
Venezuela	2470	VEN	26.75	52.5			346		UNSCEAR 2006 survey	Canoba A. etal. Indoor radon measurements in six Latin American countries. Geofisica Internacional 41(4):453-457, 2002.
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.