What do you think a reasonably cautious approach to Tokyo tap water is?
The level of radiation in 1 liter is apparently equivalent to 1/26th of a chest x-ray.
Since I drink 2 liters of water a day it seems reasonable to not drink Tokyo tap water. I drink bottled water anyway, so that doesn’t matter.
But what about other uses of tap water: washing dishes, brushing teeth, showering, boiling eggs (not that there are any eggs to boil). I can’t substitute bottled water for those because bottled water is in short supply and I need to reserve it for drinking. What are other peoples’ thoughts? doug