UPDATE: Health officials in Japan said on Wednesday that the radioactive iodine (RI) content of tap water in Tokyo was found to be increased twice the upper limit considered safe for babies. The RI level measured 210 becquerels per liter (Bq/L) of iodine-131. The recommended limit for infants is 100 Bq/L of iodine-131.
The public is urged to avoid giving tap water to infants who are sensitive to RI, which may cause thyroid malignancy, in a report by Boston.com.
Tokyo Governor Shintaro Ishihara said, "We advise against using the tap water for drinking and for making infant formula for babies under 1 year old."
However, the RI levels of the tap water does not pose immediate threats to adults. The recommended limit for adults is 300 Bq/L of iodine-131.
More information here.
* * *The health ministry of Japan advised the public on Wednesday to refrain from eating 11 vegetables produced in Fukushima Prefecture that were found to have higher than normal levels of radioactive materials following a series of explosions on the damaged nuclear plant.
In addition to the earlier indefinite ban on vegetables—spinach and kakina—health ministry officials forbid the consumption of broccoli, cabbages, turnips and other green leafy veggies such as aburana, chijirena, komatsuna, kosaitai, santona andshinobufuyuna for the mean time, in a report by Japan Today. Sorry, I am not familiar with the English translation.