The monitoring of rain water in some places in the United States is now turning up some radioactivity. Below are some links to various articles about it.
Pocono Record – Uptick seen in iodine sales around Poconos
The Daily Mail – Poison particles from nuke plant found in AT LEAST 12 US States as Japan is put on ‘Maximum’ radiation alert.
The Economic Times – Radiation in US rainwater likely from Japan