At 43 picocuries of Cesium and 18 picocuries of iodine, I wouldn't get too worked up. If it's any consolation, rainwater generally doesn't carry as strong a concentration of isotopes as milk:
http://www.romaniantimes.at/news/General...in_Romania
History lesson:
Marie Sklodowska Curie was a physicist and chemist and a pioneer in the field of radioactivity. In fact, it was Curie that coined the term radioactivity, though Henri Becquerel discovered the phenomenon years earlier. Curies research into the properties of two different uranium ores, pitchblende and chalcolite. led to the discovery of radium and polonium, other radioactive elements. Curie’s husband, Pierre, was so intrigued by her research that he decided to suspend his own research to join her.
The Curies undertook the arduous task of separating radium out of pitchblende ore. From a ton of pitchblende, one-tenth of a gram of radium chloride was separated. Unfortunately, the Curies were unaware of the deleterious health effects of repeated unprotected radiation exposure. Pierre Curie died in 1906 after being hit and run over by a horse drawn carriage, however Marie lived for another 28 years continuing her research and eventually winning two Nobel prizes. She often carried test tubes containing radioactive isotopes in her pocket and stored them in her desk drawer, remarking on the pretty blue-green light that the substances gave off in the dark.
Marie Curie died on July 4, 1934 due to aplastic anemia contracted from exposure to radiation. She is interred at the cemetery in Sceaux, alongside her husband Pierre. Her laboratory is preserved at the Musee Curie. Due to their levels of radioactivity, her papers from the 1890’s are considered too dangerous to handle. Even her cookbook is highly radioactive. They are kept in lead-lined boxes, and those who wish to consult them must wear protective clothing.
