Journalist finds Tokyo indoor dust contaminated with cesium at 1,730 Bq/kg — Scientist: Dust with Fukushima fallout is the source of human radiation exposure (VIDEO)

Published: December 14th, 2011 at 4:33 pm ET


6,264.74 Bq/Kg from house dust in Ibaraki, Fukushima Diary, December 14, 2011:

Journalist Kinoshita Kota conducted measurements for house dust in Tokyo, Chiba, Ibaraki, and Aichi.

Results for Setagaya, Tokyo


  • Cs-134 = 255.7 Bq/kg
  • Cs-137 = 290.2 Bq/kg
  • Total = 545.9 Bq/kg

House dust

  • Cs-134 = 662.57 Bq/kg
  • Cs-137 = 771.81 Bq/kg
  • Total = 1,434.38 Bq/kg

Results for Tama, Tokyo


  • Cs-134 = 88.1 Bq/kg
  • Cs-137 = 122.3 Bq/kg
  • Total = 210.4 Bq/kg

House dust

  • Cs-134 = 808 Bq/kg
  • Cs-137 = 922 Bq/kg
  • Total = 1,730 Bq/kg


Dust makes the hot particles ready inhale: [intlink id=”radiation-presentation-indoor-air-filter-just-north-of-tokyo-contaminated-with-230-picocuriesft%c2%b2-during-september-were-finding-contamination-increasing-in-food-chain-video” type=”post”]{{empty}}[/intlink]

Marco Kaltofen, the subject of his PhD dissertation is on the tracks of radioactive dust and it’s affect on human health

[…] So what I have been studying has been what happens to dust after it becomes contaminated, and how that dust carries radiation to the human body. […]

The central theme of my work is that the dust contaminated with fallout from the Fukushima accidents, is the source of human exposure to radiation. […]

So the total amount of radiation we are exposed to might in fact be low, but because we are exposing only a small number of tissues, for instance, for a respirable dust particle, we inhale the dust particle that is radioactive. It actually is about the same scale of size as a cell in the human body. So that radioactive particle is adjacent to a cell that is going to stay there because it has a long residence time. And so to that particular cell, that is not a very low dose. In fact, that is a high dose, it is actually even a lethal dose to that cell, although overall it is a very low level of exposure to the entire human body. […]

For how people are exposed to this radiation, there are several different ways these dusts will actually get into the human body. Number 1 is going to be the inhalation of airborne particles. Followed by the inhalation of re-suspended dusts. The difference being early on in the accidents, we have a lot of material emitted into the air. It is washed out by rain. It falls out as a settled dust. And then over time, the atmosphere clears but sometimes those dusts when they collect in a certain place, are going to re-suspend and the air will become contaminated again after a short downtime. […]

And if any of you are used to working with juvenile health issues, and you are familiar with contamination from lead paint in dusts in homes, we also tend to, especially as children, ingest a good deal of soils and dusts. The EPA tells us that the average child is ingesting about a tenth of a gram of dust every day. I do not know about you, but I remember my kids when they were little. They say sometimes it might be as much as a gram or even a gram and a half of dust a day. That is an important way people are exposed to contaminated soils. And lastly, there is dermal contact, getting this material on the outside. […]

New Video of Scientist Kaltofen Presenting to American Public Health Association from Fairewinds Associates on Vimeo.

Published: December 14th, 2011 at 4:33 pm ET


Related Posts

  1. Radiation Survey: Tokyo neighbor cesium approaching levels found in Fukushima — Chiba incinerator dust at 70,800 Bq/kg August 29, 2011
  2. Researcher: Indoor air filter just north of Tokyo contaminated with 230 picocuries/ft² during September — We’re finding radiation increasing in food chain (VIDEO) December 9, 2011
  3. Radioactive dust reported in Tokyo after recent fog — Over 4,000 Bq/kg of cesium — “Contamination never disappear, be careful” March 21, 2013
  4. Magazine Headline: “Radioactive black dust striking Tokyo Metropolitan area” — I’ve been told it’s everywhere in city, says reporter May 15, 2012
  5. Report: Air sample in Tokyo 270 times more contaminated with Cesium-137 than global weapons fallout peak (VIDEO) July 18, 2011

16 comments to Journalist finds Tokyo indoor dust contaminated with cesium at 1,730 Bq/kg — Scientist: Dust with Fukushima fallout is the source of human radiation exposure (VIDEO)

  • fuckyoushima

    thanks enenews.

    in north america, the cancer incidence will climb, and as helen caldicott notes, the cancer will not have a made in fukushima sticker on it.

    but we will know…

    oh we will know.

  • Atoms For Happiness Atoms For Happiness

    Obviously, dry places will tend to have more of this radioactive dust. The Tokyo Metro and train stations, in particular, have lots of dust at the best of times. I remember watching an NHK News segment back in the 1990s about why lots of kids in Tokyo were getting asthma and related diseases. They showed university researchers finding and collecting lots of samples of dust from the Tokyo Metro and train stations – from floors, nooks, corners, etc.

    Interestingly, they said the dust was detected there all year round at similar levels, regardless of the weather conditions overground, even the Japanese wet season.

    Now the dust will be radioactive dust. 1730 Bq/kg is a dangerously high level for dust. People need to avoid exposure to that, but how? They have to commute to work, etc. It is very common for people living in Tokyo to spend 2 hours or more daily commuting by the Metro and / or trains. What can they do to prevent exposure? Maybe they should wear professional grade gas masks all the time.

    That is exactly what those kids in the award-winning short movie Blind Film did.

  • dpl dpl

    electrostatic attraction to household dust accounts for higher totals for the indoor samples than outdoor. use an ionizing air filter to trap the dust. we are dust magnets cleaning the environment by breathing the dust. out of the cancers you get from fallout lung cancer is the one which cannot be cured. cancer survival is just wishful thinking.

  • Grampybone Grampybone

    Lets put this in perspective considering 50 Bq/kg can cause lesions in the body, people are showing odd bruising online and finding levels in the dust reading 1000 Bg/kg. This is going to be ugly. If the fallout dust is this hot the people of Japan are looking the worst humanitarian crisis the planet has ever seen. 1000 Bq/kg readings were recorded in Chernobyl and people who did not flee had documented medical problems relating to “low dose” exposure. It is so obscene to deny scientific fact yet the industry seems to have an excuse for everything.

  • unspokenhermit

    Many people were taking relaxed nap thinking their home to be a safe place. But it is very clear to us now we are no longer safe even at our precious home. I wonder how Government could remain so silent during this type of catastrophic aggression of nuclear contamination.

    The Japanese people are not happy.

    Many realize a significant portion of Japanese soil is not suitable for habitation. Just last October a leaked Tepco documented indicated the total amount of plutonium and neptunium emitted from the plant. This stuff sticks around for millions of years…

    If you haven’t seen the dispersion maps for plutonium they are published here:

    • vivvi

      They are silent cos they get paid to shut up. It is a sad fact that governments the world over have given their allegiance to their paymasters rather than their people. They would say arsenic was a vitamin if they got enough money for it.

  • arclight arclight

    that was a cool presentation from marco

    heres an interesting conversation at uc berkely about helen caldicott, marco, fairwinds, hot particles. National Cancer Institute the IAEA… read red mercuries comments about the nat cancer inst. LOL!

  • stopnp stopnp

    mainstream news in america continues to say nothing. Is it Because general electric is partially liable? Is it because the n r c and the iaea are full of shit? Is it because we need weapons grade uranium for the military? I guess it’s hard to see clearly when you’re involved with military/government and the private sector.

    • Pallas89juno Pallas89juno

      Dear Stop: MSM in the U.S. is owned and fully enmeshed in stakeholder terms by only five total multinational corporations. This equates, all things remaining absolutely unequal in terms of who is in charge–not the public–into an utter blackout and what information is out there is constantly being spun by these monied, toxic, martial and corporatist interests. The corporations involved, yes, GE and many other defense contractors who build nuclear bombs, only care about quarterly profits and keeping dirty secrets, getting dirtier by the day. In the 1950’s the U.S. military and nuclear weapons manufacturers decided to foist nuclear power onto the public as a way of desensitizing the public to the horrors of nuclear weapons, which had, even by then, become an integral part, in the insane minds of the idiot despots running the world (the richest in the West, and “party members” in the equation in the anything but socialist in leadership–U.S.S.R. at the time) of the geopolitics during the Cold War. Desensitization–to generate public acceptance for stupid national nuclear terrorism against other states–of the public to nuclear weapons was the original reason, not power generation, as nuclear power is not efficient in distributed costs in any way, not even counting the costs for dealing with initial abatement and cleanup when inevitable failures of said nuclear power reactors occur due to intentional lack of adequate safety features built into the designs of any extant or future planned nuclear (see “breeder reactors” and the nutty ideas of Bill Gates for Plutonium-based nuclear power lately) power reactors of the roughly one thousand civilian reactors on the planet.

  • Elenin Velikovsky Elenin Velikovsky

    Heya Arc! heya stopnp!
    All of the above!
    The authorities are Truly Satanic!
    Be not conformed to This World!
    I always wondered how I’d react, if I had the Nerve to start a Business,
    then Find Out you must pay-off Mafiosis to remain in action.
    It is “Plata O Plomo” out there…
    accept the Silver,
    or get the Lead!
    A lot of people really should have known better than to make Kids.
    The Evil Corporate-Greed-Fest of Vietnam should have shown you.
    How about the Talking Heads that were sent to Japan, to be exposed!!
    How about the fact that Pot is a great mutipurpose medicine and food?
    Massive Propaganda to criminalize millions of GOOD people,
    to justify Lying-Cop-Mafia-scum attacking these GOOD people.

    • vivvi

      Of course pot would be legal tomorrow if these mother-raping politicians could devise a way to tax it. Look how many people are killed by alcohol, but that brings in heaps of tax $$$$. Tobacco same deal. The best way to reduce drug abuse is to make it legal, which takes away the criminal’s motive to supply it. Can’t say I know anybody killed by POT, but it seems legal nuke puke is killing millions of innocent bystanders, and nobody looks like being jailed over it.

      Which simply proves that the love of money is the root of all evil.

  • beamofthewave

    I went to a community meeting yesterday and asked the city council about testing the water for radioactive fall out from fukushima. Got it in the minutes and everything. They looked all unhappy and at me like I was nuts, but I felt real good doing that.

    • Pallas89juno Pallas89juno

      Dear Beam: That’s HUGE what you did. Good job. That’s excellent courage. Thank you so much for doing that. Don’t worry about disapproving looks and words, persistence and intelligent confrontation (of collective delusion about fallout)is exactly the right thing to be doing. Thank you very much.

  • kintaman kintaman

    Once again I am so glad I took my lovely wife and family away from Tokyo and this unfolding nightmare. I miss it dearly and feel great sorrow and pain for those who will be affected. Tokyo was one of the best places on Earth to live before.

    • BreadAndButter BreadAndButter

      Congratulations, friend. You did the right thing.
      I can imagine it’s hard, but having stayed there would’ve possibly been harder….

      Good choice.