3/28/2011 EPA air filter results.

They have released results from air filters today as well:

http://epa.gov/japan2011/docs/rert/radnet-filter-data-public-release-3-2...

It doesn't say in the PDF, but in the FAQ it says they are only testing gamma emissions:

"Since the Japanese nuclear incident, EPA has accelerated routine precipitation sampling efforts. EPA received samples from 18 stations (as of March 21, 2011) and will perform gamma analysis on each sample, followed by the routine analyses. Routine analysis of precipitation for gamma emissions takes about two days from the time the lab receives the sample. This is to ensure the proper analysis and quality assurance (QA) takes place before the results are released. The tests for specific radioactive material may take longer."

So don't expect to see Plutonium or other alpha emitting particles reported here.