National Radioactive Material Monitoring in the Water Environment in the Whole of Japan(2015） List of Results（Final Report） Results of Measurement in Public Water Areas(Water) ······································1 Results of Measurement in Public Water Areas(Sediment) ··································7 Results of Measurement in Public Water Areas(Surrounding Environment) ··········· 23 Results of Measurement of Groundwater(Water) ··········································· 38 Results of Measurement in Public Water Areas(Water) 1 Results of Measurement in Public Water Areas(Water) Sampling location General items Water Water depth Sampling Transparency Secchi disk depth Electrical Detected γ-ray emitting radionuclides Total β radioactivity No. Prefecture Property Sampling Date Weather SS Turbidity Remarks Water area Location Municipality (m) depth （River） （Lake） conductivity （ ） Measured value Lower detection Measured value Lower detection (mg/L) FNU Radionuclides (m) (cm) (m) (mS/m) （Bq/L) limit（Bq/L) （Bq/L) limit（Bq/L) Water purification plant intake at Ishikari River in Asahikawa 1 Asahikawa City 2015/10/15 Sunny 2.0 0.1 97 - 6.8 3 4 Pb-210 0.074 0.071 0.044 0.024 City Ishikari River Intake at the Shirakawa water purification plant in Sapporo 2 Sapporo City 2015/10/22 Sunny 1.7 0.1 >100 - 15.2 1 2 K-40 0.063 0.030 0.053 0.026 City Nakashibetsu Bridge 3 Teshio River (Intake at the Higashiyama water purification plant in Shibetsu City 2015/10/15 Cloudy 0.8 0.1 95 - 8.1 4 7 K-40 0.043 0.023 0.049 0.026 Shibetsu City) K-40 0.079 0.043 4 Tokoro River Tadashi Bridge Kitami City 2015/10/16 Sunny 0.9 0.1 >100 - 15.0 4 4 0.063 0.027 Pb-210 0.099 0.084 Hokkaido 5 Prefecture Kushiro River Intake at the Aikoku water purification plant in Kushiro City Kushiro City 2015/10/19 Sunny 1.8 0.1 >100 - 15.9 14 6 K-40 0.061 0.038 0.057 0.025 6 Tokachi River Nantai Bridge Obihiro City 2015/10/19 Sunny 1.0 0.1 >100 - 6.2 <1 <1 K-40 0.089 0.019 0.076 0.025 7 Sarugawa River Sarugawa Bridge (Tomigawa) Hidaka Town 2015/10/20 Cloudy 1.2 0.1 >100 - 11.4 1 1 Be-7 0.010 0.0090 ND 0.026 Mitsumoribashi Bridge (Before the confluence with 8 Matsukura River Hakodate City 2015/10/21 Sunny 0.3 0.1 >100 - 7.5 1 <1 K-40 0.028 0.028 ND 0.026 Torasawa River) Shiribeshi-toshibetsu Intake at the Kitahiyama simple water plant in Kitahiyama 9 Setana Town 2015/10/21 Sunny 0.6 0.1 >100 - 7.5 1 1 Be-7 0.017 0.0080 0.040 0.024 River Town 10 Iwaki River Tsugaru-ohashi Bridge Nakadomari Town 2015/10/22 Sunny 3.1 0.1 56 - 22.7 7 6 K-40 0.068 0.027 0.055 0.028 Aomori Prefecture 11 Mabechi River Shiriuchi Bridge Hachinohe City 2015/10/20 Sunny 1.2 0.1 >100 - 13.3 1 1 K-40 0.051 0.037 0.038 0.025 K-40 0.042 0.025 12 Mabechi River Fugane Bridge Ninohe City 2015/10/19 Sunny 1.3 0.1 >100 - 11.9 1 1 0.036 0.026 Pb-214 0.0020 0.0019 Iwate K-40 0.30 0.046 Prefecture 13 Heigawa River Miyako Bridge Miyako City 2015/10/16 Sunny 1.8 0.1 >100 - 155 <1 1 0.26 0.040 Rivers Pb-210 0.16 0.13 14 Kitakami River Chitose Bridge Ichinoseki City 2015/10/15 Sunny 1.2 0.1 48 - 11.8 3 8 K-40 0.033 0.025 0.057 0.024 K-40 0.058 0.030 15 Abukuma River Iwanuma (Abukuma Bridge) Iwanuma City 2015/10/13 Sunny 1.1 0.1 56 - 17.6 6 8 Cs-134 0.0021 0.0013 0.088 0.026 Miyagi Cs-137 0.0066 0.0013 Prefecture K-40 3.5 0.083 16 Natori River Yuriage-ohashi Bridge Natori City 2015/10/14 Sunny 0.9 0.1 82 - 1540 3 3 2.6 0.23 Cs-137 0.0076 0.0041 Be-7 0.015 0.0087 17 Yoneshiro River Noshiro Bridge Noshiro City 2015/10/23 Sunny 3.2 0.1 >100 - 14.5 1 1 0.028 0.027 Akita K-40 0.043 0.022 Prefecture 18 Omono River Kurose Bridge Akita City 2015/10/26 Sunny 1.7 0.1 >100 - 12.2 3 4 K-40 0.039 0.027 0.032 0.024 19 Mogami River Ryou Bridge Sakata City 2015/10/28 Sunny 2.9 0.1 >100 - 38.9 6 3 K-40 0.12 0.032 0.13 0.027 Be-7 0.023 0.0071 Yamagata Prefecture 20 Akagawa River Shinkawa Bridge Sakata City 2015/10/29 Cloudy 0.8 0.1 >100 - 8.8 3 2 K-40 0.032 0.018 0.031 0.026 Pb-214 0.0015 0.0014 K-40 0.049 0.026 21 Agano River Shingo Dam Kitakata City 2015/10/22 Sunny 6.1 0.1 >100 - 9.6 2 3 0.047 0.024 Cs-137 0.0018 0.00096 K-40 0.045 0.035 Fukushima Prefecture 22 Abukuma River Taisho Bridge (Fushiguro) Date City 2015/10/20 Sunny 0.8 0.1 >100 - 19.7 5 4 Cs-134 0.0024 0.0014 0.10 0.026 Cs-137 0.012 0.0013 23 Kujigawa River Takachihara Bridge Yamatsuri Town 2015/10/21 Sunny 0.9 0.1 >100 _ 10.7 1 1 K-40 0.037 0.024 0.059 0.026 * This preliminary report does not contain counting errors concerning activity concentrations. 2 Results of Measurement in Public Water Areas(Water) Sampling location General items Water Water depth Sampling Transparency Secchi disk depth Electrical Detected γ-ray emitting radionuclides Total β radioactivity No. Prefecture Property Sampling Date Weather SS Turbidity Remarks Water area Location Municipality (m) depth （River） （Lake） conductivity （ ） Measured value Lower detection Measured value Lower detection (mg/L) FNU Radionuclides (m) (cm) (m) (mS/m) （Bq/L) limit（Bq/L) （Bq/L) limit（Bq/L) K-40 0.17 0.026 Center（Surface layer） 0.1 27 26.5 14 16 Cs-134 0.0067 0.0011 0.11 0.028 Cs-137 0.029 0.0010 24 Lake Lake Kasumigaura Miho Village 2015/10/27 Sunny 5.9 0.7 K-40 0.18 0.025 Center（Bottom layer） 4.9 26 27.8 12 13 Cs-134 0.0051 0.0011 0.15 0.025 Ibaraki Prefecture Cs-137 0.023 0.0010 Ac-228 0.0061 0.0029 K-40 0.11 0.026 25 Kokai River Fumimaki Bridge Toride City 2015/10/23 Cloudy 0.9 0.1 >100 - 23.7 7 4 0.12 0.025 Cs-134 0.0012 0.0011 Cs-137 0.0053 0.0012 26 Nakagawa River Shinnaka Bridge Nakagawa Town 2015/10/14 Sunny 1.6 0.1 >100 - 15.2 1 1 Cs-137 0.0032 0.0013 0.037 0.026 Tochigi Prefecture 27 Kinugawa River Kinugawa Bridge (Hoshakuji Temple) Utsunomiya City 2015/10/15 Sunny 2.4 0.1 >100 - 11.1 2 2 K-40 0.039 0.025 0.040 0.024 Chiyoda Town/ K-40 0.12 0.026 28 Tonegawa River Toneozeki Weir Gyoda City (Saitama 2015/10/13 Sunny 0.2 0.1 59 - 28.3 7 7 0.090 0.025 Prefecture) Cs-137 0.0029 0.0014 Gunma Prefecture K-40 0.067 0.022 29 Watarase River Watarase-ohashi Bridge Tatebayashi City 2015/10/13 Sunny 2.2 0.1 >100 - 17.8 1 1 0.049 0.026 Cs-137 0.0024 0.0011 30 Rivers Arakawa River Kugebashi Bridge Kumagaya City 2015/10/14 Sunny 0.8 0.1 >100 - 19.8 4 2 K-40 0.045 0.016 0.052 0.025 K-40 0.081 0.024 Saitama City/Shiki 31 Arakawa River Akigase Intake Weir 2015/10/13 Sunny 2.7 0.1 >100 - 25.1 4 2 0.090 0.027 City Cs-137 0.0015 0.0012 Saitama Prefecture K-40 0.075 0.037 Nagareyama City 32 Edogawa River Nagareyama Bridge （Chiba Prefecture） 2015/10/15 Sunny 0.6 0.1 88 - 25.3 9 7 Cs-134 0.0017 0.0010 0.084 0.028 /Misato City Cs-137 0.0041 0.0012 K-40 0.11 0.028 Pb-214 0.0028 0.0018 33 Tonegawa River Kakozeki Weir Tonosho Town 2015/11/5 Sunny 5.2 0.1 44 - 33.4 7 6 0.11 0.025 Cs-134 0.0026 0.0012 Cs-137 0.0083 0.0014 34 Ichinomiya River Nakano Bridge Ichinomiya Town 2015/12/8 Cloudy 2.9 0.1 51 - 961 9 8 K-40 1.7 0.081 1.8 0.11 Chiba K-40 0.12 0.028 Prefecture Lower area of water purification plant intake 0.1 44 30.7 25 13 Cs-134 0.0054 0.0011 0.13 0.028 （Surface layer） Cs-137 0.023 0.0011 35 Lake Lake Inbanuma Sakura City 2015/11/6 Sunny 1.4 0.58 K-40 0.13 0.028 Lower area of water purification plant intake 0.4 38 30.8 28 14 Cs-134 0.0058 0.0011 0.094 0.026 （Bottom layer） Cs-137 0.023 0.0011 K-40 0.069 0.040 36 Edogawa River Shinkatsushika Bridge Katsushika City 2015/10/16 Cloudy 0.6 0.1 >100 - 26.1 3 4 0.084 0.026 Cs-137 0.0061 0.0014 37 Tamagawa River Haijima raw water supply point Akishima City 2015/10/20 Sunny 0.9 0.1 >100 - 13.4 1 1 Pb-214 0.0017 0.0016 0.030 0.026 K-40 2.6 0.084 Tokyo Metropolis Chuo City /Sumida 38 Sumida River Ryogoku Bridge 2015/10/16 Cloudy 2.4 0.1 >100 - 1270 5 4 Cs-137 0.0058 0.0037 2.3 0.18 City Rivers I-131 0.016 0.0049 K-40 3.5 0.079 Koto City /Edogawa 39 Arakawa River Kasai Bridge 2015/10/19 Sunny 1.8 0.1 56 - 1780 10 10 4.1 0.27 City Cs-137 0.0063 0.0049 40 Tsurumi River Rinko Tsurumigawa Bridge Yokohama City 2015/10/29 Sunny 6.0 0.1 >100 - 1820 2 2 K-40 4.1 0.083 4.1 0.29 Kanagawa 41 Sagami River Banyu Bridge Hiratsuka City 2015/10/30 Cloudy 2.5 0.1 >100 - 533 1 2 K-40 0.98 0.083 0.94 0.074 Prefecture 42 Sakawa River Sakawa Bridge Odawara City 2015/10/28 Sunny 1.3 0.1 >100 - 16.7 7 3 K-40 0.054 0.032 0.059 0.025 * This preliminary report does not contain counting errors concerning activity concentrations.