National Radioactive Material Monitoring in the Water Environment in the Whole of Japan (2014) List of Results (Final Report) Results of Measurement in Public Water Areas (Water)............................................. 1 Results of Measurement in Public Water Areas (Sediments)...................................... 7 Results of Measurement in Public Water Areas (Surrounding Environment)............. 22 Results of Measurement of Groundwater (Water)....................................................... 38 Results of Measurement in Public Water Areas (Water) Sampling location General items Water Water Sampling No. Prefecture Property Weather depth Sampling Transparency Secchi disk depth Electrical Detected γ-ray emitting radionuclides Total β radioactivity Remarks Date SS Turbidity Water area Location Municipality (m) depth （River） （Lake） conductivity (mg/L) （FNU） Measured value Lower detection Measured value Lower detection limit (m) (cm) (m) (mS/m) Radionuclides （Bq/L) limit（Bq/L) （Bq/L) （Bq/L) Clean water intake at Ishikari River in Asahikawa Asahikawa 1 2014/9/1 Sunny 1.7 0.1 >100 - 9.5 2 2 － － － ND 0.025 － City City Ishikari River Intake at the Shirakawa water purification plant in Bi-214 0.0023 0.0018 2 Sapporo City 2014/10/24 Sunny 1.7 0.0 73 - 17.3 1 3 ND 0.026 － Sapporo City K-40 0.067 0.027 Nakashibetsu Bridge 3 Teshio River (Intake at the Higashiyama water purification plant Shibetsu City 2014/9/1 Sunny 1.0 0.1 59 - 8.6 6 7 － － － ND 0.025 － in Shibetsu City) Bi-212 0.022 0.021 4 Tokoro River Tadashi Bridge Kitami City 2014/8/29 Sunny 1.2 0.1 54 - 16.1 13 5 0.041 0.025 － K-40 0.084 0.049 Hokkaido Prefecture Intake at the Aikoku water purification plant in 5 Kushiro River Kushiro City 2014/8/28 Sunny 1.9 0.1 64 - 18.1 22 6 K-40 0.052 0.051 0.027 0.025 － Kushiro City 6 Tokachi River Nantai Bridge Obihiro City 2014/8/28 Sunny 1.3 0.1 90 - 5.8 2 1 K-40 0.058 0.034 ND 0.025 － 7 Sarugawa River Sarugawa Bridge (Tomigawa) Hidaka Town 2014/9/2 Sunny 0.8 0.1 56 - 14.5 7 14 － － － ND 0.025 － Mitsumoribashi Bridge (Before the confluence with 8 Matsukura River Hakodate City 2014/8/26 Cloudy 0.4 0.1 >100 - 10.3 5 2 － － － ND 0.025 － Torasawa River) Shiribeshi- Intake at the Kitahiyama simple water plant in 9 Setana Town 2014/8/26 Sunny 0.4 0.1 >100 - 9.3 3 2 K-40 0.040 0.040 ND 0.025 － toshibetsu River Kitahiyama Town Nakadomari K-40 0.066 0.027 10 Iwaki River Tsugaru-ohashi Bridge 2014/9/8 Sunny 3.7 0.1 25 - 15.9 7 12 0.033 0.020 － Aomori Town Pb-214 0.0019 0.0019 Prefecture Rivers Hachinohe 11 Mabechi River Shiriuchi Bridge 2014/9/9 Sunny 1.6 0.1 60 - 14.7 1 4 K-40 0.055 0.043 0.032 0.020 － City 12 Mabechi River Fugane Bridge Ninohe City 2014/9/15 Sunny 0.9 0.1 52 - 11.5 5 2 K-40 0.048 0.032 ND 0.020 － 13 Heigawa River Miyako Bridge Miyako City 2014/9/10 Cloudy 1.8 0.1 87 - 182 <1 <1 K-40 0.23 0.036 0.11 0.020 － Iwate K-40 0.046 0.025 Prefecture 14 Kitakami River Chitose Bridge Ichinoseki City 2014/9/16 Cloudy 1.2 0.1 78 - 12.9 1 3 Pb-214 0.0023 0.0017 0.025 0.020 － Cs-137 0.0012 0.00096 K-40 0.059 0.028 Pb-214 0.0030 0.0022 15 Abukuma River Iwanuma (Abukuma Bridge) Iwanuma City 2014/9/17 Cloudy 0.8 0.1 44 - 16.3 6 5 0.097 0.020 － Cs-134 0.0099 0.0012 Miyagi Cs-137 0.032 0.0011 Prefecture K-40 0.17 0.039 16 Natori River Yuriage-ohashi Bridge Natori City 2014/9/1 Cloudy 1.0 0.1 44 - 101 24 19 Cs-134 0.0016 0.0014 0.065 0.020 － Cs-137 0.0050 0.0014 － － － － 17 Akita Yoneshiro River Noshiro Bridge Noshiro City 2014/9/7 Cloudy 4.1 0.1 80 - 11.1 1 1 0.032 0.020 Prefecture 18 Omono River Kurose Bridge Akita City 2014/9/4 Cloudy 1.8 0.1 >100 - 11.5 2 2 K-40 0.047 0.030 0.022 0.020 － 1 Results of Measurement in Public Water Areas (Water) Sampling location General items Water Water Sampling No. Prefecture Property Weather depth Sampling Transparency Secchi disk depth Electrical Detected γ-ray emitting radionuclides Total β radioactivity Remarks Date SS Turbidity Water area Location Municipality (m) depth （River） （Lake） conductivity (mg/L) （FNU） Measured value Lower detection Measured value Lower detection limit (m) (cm) (m) (mS/m) Radionuclides （Bq/L) limit（Bq/L) （Bq/L) （Bq/L) K-40 0.11 0.031 19 Mogami River Ryou Bridge 2014/9/2 Sunny 2.3 0.1 58 - 45.0 7 4 0.067 0.020 － Cs-137 0.0016 0.0013 Yamagata Sakata City Ac-228 0.0037 0.0036 Prefecture 20 Akagawa River Shinkawa Bridge 2014/9/2 Sunny 0.3 0.1 87 - 12.1 2 3 Be-7 0.0099 0.0085 0.035 0.020 － K-40 0.049 0.024 Cs-134 0.0017 0.00098 21 Rivers Agano River Shingo Dam Kitakata City 2014/9/12 Sunny 8.5 0.1 77 - 8.0 1 <1 0.030 0.020 － Cs-137 0.0051 0.0011 K-40 0.055 0.032 Fukushima 22 Abukuma River Taisho Bridge (Fushiguro) Date City 2014/9/17 Sunny 1.8 0.1 50 - 16.7 6 4 Cs-134 0.0075 0.00091 0.045 0.020 － Prefecture Cs-137 0.020 0.0011 Yamatsuri K-40 0.035 0.024 23 Kujigawa River Takachihara Bridge 2014/9/18 Sunny 2.7 0.1 82 - 8.7 4 2 0.031 0.020 － Town Cs-137 0.0027 0.00095 K-40 0.14 0.018 Center（Surface layer） 0.1 33 27.8 13 23 Cs-134 0.012 0.0010 0.099 0.019 － Lake Cs-137 0.035 0.00082 24 Lake Miho Village 2014/9/4 Sunny 6.1 36 Kasumigaura K-40 0.17 0.018 Center（Lower layer） 5.1 32 27.7 13 21 0.11 0.019 － Ibaraki Cs-134 0.013 0.00094 Prefecture Cs-137 0.035 0.00094 K-40 0.093 0.027 Pb-210 0.083 0.072 25 Kokai River Fumimaki Bridge Toride City 2014/9/10 Cloudy 1.9 0.1 31 - 16.3 46 17 0.073 0.019 － Cs-134 0.0041 0.0013 Cs-137 0.012 0.0013 K-40 0.055 0.027 Nakagawa 26 Nakagawa River Shinnaka Bridge 2014/9/8 Cloudy 1.6 0.1 >100 - 13.7 2 2 Cs-134 0.0025 0.0013 0.025 0.023 － Town Tochigi Cs-137 0.0086 0.0012 Prefecture K-40 0.023 0.019 Utsunomiya 27 Kinugawa River Kinugawa Bridge (Hoshakuji Temple) 2014/9/9 Sunny 1.8 0.1 >100 - 9.4 2 1 Cs-134 0.0013 0.00091 ND 0.023 － City Cs-137 0.0052 0.00080 Rivers K-40 0.097 0.029 28 Tonegawa River Tone-ozeki Weir Chiyoda Town 2014/8/25 Cloudy 0.5 0.1 50 - 21.6 7 4 Cs-134 0.0015 0.0015 0.068 0.023 － Gunma Cs-137 0.0074 0.0013 Prefecture K-40 0.046 0.025 Tatebayashi 29 Watarase River Watarase-ohashi Bridge 2014/8/25 Rain 2.5 0.1 >100 - 16.9 1 <1 Pb-210 0.071 0.058 0.035 0.023 － City Cs-137 0.0025 0.0012 Kumagaya 30 Arakawa River Kugebashi Bridge 2014/8/28 Cloudy 0.4 0.1 >100 - 19.8 2 1 K-40 0.066 0.031 ND 0.023 － City Saitama K-40 0.071 0.025 Prefecture Saitama 31 Arakawa River Akigase Intake Weir 2014/8/29 Cloudy 2.6 0.1 66 - 20.1 5 1 Cs-134 0.0016 0.0012 0.070 0.023 － City/Shiki City Cs-137 0.0046 0.0011 2 Results of Measurement in Public Water Areas (Water) Sampling location General items Water Water Sampling No. Prefecture Property Weather depth Sampling Transparency Secchi disk depth Electrical Detected γ-ray emitting radionuclides Total β radioactivity Remarks Date SS Turbidity Water area Location Municipality (m) depth （River） （Lake） conductivity (mg/L) （FNU） Measured value Lower detection Measured value Lower detection limit (m) (cm) (m) (mS/m) Radionuclides （Bq/L) limit（Bq/L) （Bq/L) （Bq/L) Nagareyama K-40 0.085 0.024 Saitama City（Chiba 32 Edogawa River Nagareyama Bridge 2014/8/27 Cloudy 0.6 0.1 51 - 22.4 32 9 Cs-134 0.0034 0.0013 0.052 0.023 － Prefecture Prefecture） /Misato City Cs-137 0.011 0.0011 K-40 0.090 0.025 33 Rivers Tonegawa River Kakozeki Weir Tonosho Town 2014/9/1 Cloudy 1.2 0.1 50 - 28.5 9 5 Cs-134 0.0029 0.0013 0.049 0.026 － Cs-137 0.0095 0.0011 The container size was changed as there was a large Ichinomiya 34 Ichinomiya Nakano Bridge 2014/9/1 Cloudy 3.2 0.1 52 - 1,360 7 5 K-40 2.6 0.081 0.96 0.46 amount of evaporation residue Town due to the influence of seawater.