3/28/2011 — From The Boston Globe, March 28, 2011: “[…] …The concentration of radioiodine found in the rainwater sample was 79 pCi/L (picocuries per liter). Auerbach said that hypothetically, even if someone drank the rainwater directly, “it is still 25 times less risky than it would need to be in order to cause any kind of health concerns . . . . And that is even true for the population that would be the most vulnerable, such as pregnant women, breast-feeding women, and infants. […]’’
Massachussets rainwater: 79 pCi/L (picocuries per liter)…
Thanks, Boston Globe, another radiation unit… Here’s a Converter to go from picoCurie to Becquerel: http://www.unitconversion.org/radiation-activity/becquerels-to-picocuries-conversion.html
79 pCi/L = 2.923 Bq/L
Similar levels of radioactivity in rainwater samples have been found in California, Washington, and Pennsylvania.