Officials in the quake-hit Japanese capital said tests had shown 210 becquerels per litre of iodine-131.

The recommended limit for infants is 100 becquerels per litre…

“It is really scary. It is like a vicious negative spiral from the nuclear disaster,” said Etsuko Nomura, who lives in the city with her two young children.

“We have contaminated milk and vegetables, and now tap water in Tokyo, and I’m wondering what’s next.”