Monitoring information of environmental radioactivity level
Nuclear Reguation Authority

Reading of radioactivity level in drinking water by prefecture(be collected in December 16, 2011)

Announcement at 18 o'clock December 17 2011

Bq/kg

  Prefecture City Drinking Water
I-131 Cs-134 Cs-137 Remarks
1 Hokkaido Sapporo Not Detectable Not Detectable Not Detectable  
2 Aomori Aomori Not Detectable Not Detectable Not Detectable  
3 Iwate Morioka Not Detectable Not Detectable Not Detectable  
4 Miyagi - - - Refer to the website of Miyagi Pref.: http://www.pref.miyagi.jp/kokusai/en/accidents_fukushima_nuclear.htm
5 Akita Akita Not Detectable Not Detectable Not Detectable  
6 Yamagata Yamagata Not Detectable Not Detectable Not Detectable  
7 Fukushima - - - Refer to the website of Fukushima Pref.: http://www.pref.fukushima.jp/index_e.html
8 Ibaraki Hitachinaka Not Detectable Not Detectable Not Detectable
9 Tochigi Utsunomiya Not Detectable Not Detectable Not Detectable  
10 Gunma Maebashi Not Detectable Not Detectable Not Detectable  
11 Saitama Saitama Not Detectable Not Detectable Not Detectable  
12 Chiba Ichihara Not Detectable Not Detectable Not Detectable  
13 Tokyo Shinjuku Not Detectable Not Detectable Not Detectable  
14 Kanagawa Chigasaki Not Detectable Not Detectable Not Detectable  
15 Niigata Niigata Not Detectable Not Detectable Not Detectable  
16 Toyama Imizu Not Detectable Not Detectable Not Detectable  
17 Ishikawa Kanazawa Not Detectable Not Detectable Not Detectable  
18 Fukui Fukui Not Detectable Not Detectable Not Detectable  
19 Yamanashi Kofu Not Detectable Not Detectable Not Detectable  
20 Nagano Nagano Not Detectable Not Detectable Not Detectable  
21 Gifu Kakamigahara Not Detectable Not Detectable Not Detectable  
22 Shizuoka Shizuoka Not Detectable Not Detectable Not Detectable  
23 Aichi Nagoya Not Detectable Not Detectable Not Detectable  
24 Mie Yokkaichi Not Detectable Not Detectable Not Detectable  
25 Shiga Otsu Not Detectable Not Detectable Not Detectable  
26 Kyoto Kyoto Not Detectable Not Detectable Not Detectable  
27 Osaka Osaka Not Detectable Not Detectable Not Detectable  
28 Hyogo Kobe Not Detectable Not Detectable Not Detectable  
29 Nara Nara Not Detectable Not Detectable Not Detectable  
30 Wakayama Wakayama Not Detectable Not Detectable Not Detectable  
31 Tottori Touhaku Not Detectable Not Detectable Not Detectable  
32 Shimane Matsue Not Detectable Not Detectable Not Detectable  
33 Okayama Okayama Not Detectable Not Detectable Not Detectable  
34 Hiroshima Hiroshima Not Detectable Not Detectable Not Detectable  
35 Yamaguchi Yamaguchi Not Detectable Not Detectable Not Detectable  
36 Tokushima Tokushima Not Detectable Not Detectable Not Detectable  
37 Kagawa Takamatsu Not Detectable Not Detectable Not Detectable  
38 Ehime Yawatahama Not Detectable Not Detectable Not Detectable  
39 Kochi Kochi Not Detectable Not Detectable Not Detectable  
40 Fukuoka Dazaifu Not Detectable Not Detectable Not Detectable  
41 Saga Saga Not Detectable Not Detectable Not Detectable  
42 Nagasaki Omura Not Detectable Not Detectable Not Detectable  
43 Kumamoto Uto Not Detectable Not Detectable Not Detectable  
44 Oita Oita Not Detectable Not Detectable Not Detectable  
45 Miyazaki Miyazaki Not Detectable Not Detectable Not Detectable  
46 Kagoshima Kagoshima Not Detectable Not Detectable Not Detectable  
47 Okinawa Naha Not Detectable Not Detectable Not Detectable  

1.These figures are estimated as 1Bq/liter = 1Bq/kg
2.The table was made by MEXT, based on the reports from prefectures.
3.Emergency Preparedness for Nuclear Facilities The Nuclear Safety Commission of Japan The index of drinking water based on the indicator about the restriction of food intake
I-131:More than 300Bq/kg, Cs-134 and Cs-137:More than 200Bq/kg
4.The detection limits of I-131, Cs-134 and Cs-137 are approximately 0.1-0.7Bq/kg