Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 4 2 1975 06 15 34 39 B. Khademi M. Shariat Panahi 2015 10 03 Toward March 1970 up to May 1972 it was monthly measured the Radium quantity, available in, Tehran milk, fortunate1y the results were in accordance to a reasonable value. The only remarkable point was that in wintertime, the Indio activity decreased to minimum of 0.02 Pci/lit, and in spring time it went up to a maxi­mum of 0.09 Pci/lit. The next note worthy point was observed in a special contaminated area in Ramsar that with comparison of our results showed a prominent value near 0.8 Pci/lit. https://ijph.tums.ac.ir/index.php/ijph/article/view/2469 https://ijph.tums.ac.ir/index.php/ijph/article/download/2469/2449