Mochizuki over at Fukushima Diary reports on radionuclide analysis of vacuum bags from homes in a town in Chiba prefecture, just a few kilometers north and east of Tokyo:

20,201 Bq/Kg from vacuum cleaner in Chiba

The very bad news is that over 20,000 Bq/Kg is high-level radioactive waste that was scattered around someone’s home in a populous area.  That dust was irradiating anyone in the home and worse yet, being inhaled into their lungs.

The very good news is that the cesium and other radionuclides are no longer in that person’s house – and that frequent vacuuming can make a significant difference in the amount of radiation around the home.  You have the power to make your home much safer for yourself and your loved ones.

Air filters, particularly HEPA filters are also very effective at reducing exposure to radioactive dust.  Michael Collins at has repeatedly demonstrated through testing in Los Angeles that HEPA filters will accumulate radiation at many multiples of background radiation.  Due to lack of radionuclide analysis, we cannot confirm that his readings indicate radiation from Fukushima, but we can confirm that household dust in the US can be highly radioactive and the less that you breathe, the better you will feel and the longer you will live.

So, vacuum frequently, get an air filter, breathe deep and seek peace.