Related to this article..Iodine 131 measured in Tokyo
Iodine 131 has been measured in multiple water purification plants in Yamanashi as well. The sample is dried sewage sludge.
The latest measurement date is 4/17/2012. On 2/14/2012, they measured 1510 Bq/Kg at one of the water purification plants.
(平成23年5月17日 means 5/17/2011, 平成24年4月17日 means 4/17/2012. 不検出 means ND. )