Cesium Found In Children’s Urine Shows Ongoing Widespread Problem In Japan

The acceptable amount of radioactive cesium in human urine is zero. The substances (cesium 134 and 137) does not exist in nature and cause damage to the human body.

It was widely reported that a citizen group in the Tokyo region found cesium in children’s urine recently. While this is notable, it isn’t unique. Radioactive cesium has been found in the urine of children across a wide area of northern Japan since 2011. The levels do not seem to be going away. Levels seemed slightly higher earlier and higher closer to Fukushima but high levels were detected still now around Tokyo and in 2012 in places where it was not expected like Akita.

Also in 2013 a group in metropolitan Tokyo continued to find cesium in children’s urine. While they tested fewer children the amounts and instance percentage appears to be about the same as they found in 2011 and 2012. The Tokyo metro findings for 2013 were between .04 bq/kg to .43 bq/kg 

Testing in Miyagi prefecture for 2013 by citizen group ACRO showed from .25 to 1.18 bq/liter contamination in children’s urine.
* A liter of water is equal to one kilogram of weight, urine should be about the same so the two measuring methods should be about the same. 

Results from Iwate prefecture in early 2013 showed children with .50 to 1 bq/liter of cesium in their urine.

In 2012 cesium was found in the urine of children from Akita prefecture in western Japan. Levels of .075 to .1 bq/kg were found in their urine.

In mid 2012  141 children in Fukushima prefecture were found to have cesium in their urine. Most were below 10 bq/kg without the actual numbers being given and at least one at 17.5 bq/kg.

In early 2012 children from around Tohoku region and as far south as Chiba were found by citizen group ACRO to have between .30 bq/liter and 3.21 bq/liter of cesium in their urine.

Most of the testing groups have assumed contaminated food to be the cause of these ongoing contamination levels in children. Some had improvement by having parents change food consumption habits. We also reported recently that many municipal water supplies around Japan are still contaminated with cesium.

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