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Niigata Prefecture Home Testing Results of Radioactive Substances
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Testing Results of Radioactive Substances


Environmental Radiation Monitoring results

Click the pointer on the map and the radioactive testing result will be indicated.
Data is updated every minute.
Measured value may change depending on the monitoring post and climate. Monitoring units are shown in μSy/h. 1nGy is equal to 0.001μSv. Normal monitoring results of the regular monitoring posts around Niigata prefecture range between 0.016-0.16μSv/h.

Tap Water

Water suppliers carry out testing at each purification plant once a year to once a month in frequency. (Testing frequency varies depending on the testing point)
Currently there is neither radioactive cesium nor iodine detected in tap water in Niigata Prefecture.

*Measurement standard based on the Food Sanitation Act (drinking water)
Radioactive Cesium  10 Bq/kg
Radioactive iodine  No set measurement standard

Food products (which are sold at domestic market)

Daily regular testing is conducted in agricultural produce, livestock products, seafood and processed food. The latest results show that there are no items which exceed the measurement standard based on the Food Sanitation Act found in Niigata Prefecture.

*Food Sanitation Act Measurement standard (general food)
Radioactive Cesium  100Bq/kg
Radioactive iodize  No set measurement standard
*Food Sanitation Act Measurement standard (milk and infant food products)
Radioactive Cesium  50 Bq/kg
Radioactive iodine  No set measurement standard