Readings of Environmental Radiation Monitoring of Public Water Areas (Preliminary Report) July 21, 2011 Nuclear Emergency Response Headquarters (Radioactivity Team) Disaster Provision Main Office of Fukushima Pref. (Nuclear Power Team) 1 Date Friday, July 1 – Friday, July 15, 2011 2 Number of monitoring locations Rivers: 28 locations (water quality) Lakes and dam reservoirs: 20 locations (water quality) Lakes and dam reservoirs: 2 locations (bottom sediment) Agricultural reservoirs: 9 locations (water quality) Groundwater: 2 locations (water quality) 3 Monitoring Results (1) Rivers (water quality) Radioactive iodine: Not detected in any locations Radioactive cesium: Cs-134 Not detected – 3.08 Bq/L Cs-137 Not detected – 4.77 Bq/L (2) Lakes and dam reservoirs (water quality and bottom sediment) a. Water quality Radioactive iodine: Not detected Radioactive cesium: Not detected b. Bottom sediment Radioactive iodine: Not detected Radioactive cesium: Cs-134 Not detected – 55.7 Bq/kg Cs-137 Not detected – 70.8 Bq/kg (3) Agricultural reservoirs: (water quality) Radioactive iodine: Not detected in any locations Radioactive cesium: Cs-134 Not detected – 1.96 Bq/L Cs-137 Not detected – 2.00 Bq/L (4) Groundwater: (water quality) Radioactive iodine: Not detected in any locations Radioactive cesium: Not detected in any locations *Water quality monitoring has been conducted once a month for rivers since May and once a month for lakes, dam reservoirs, and agricultural reservoirs since June. The quality of groundwater is monitored once a year. Readings of Environmental Radiation Monitoring at Rivers, Lakes, Dam Reservoirs, and Agricultural Reservoirs（Preliminary Report）(First report in July) July 21, 2011 Nuclear Emergency Response Headquarters (Radioactivity Team) Disaster Provision Main Office of Fukushima Pref. (Nuclear Power Team) Water & Air Environment Division, Social Affairs & Environment Department, Fukushima Prefectural Government ○River water quality (Surveyed once a month: survey started in May) Analysis results (Bq/L) Location № Region Name of river Sampling Points number Radioactive iodine Radioactive cesium I-131 Cs-134 Cs-137 June 5 July 13 June 5 July 13 June 5 July 13 1 Abukuma River Taisho Bridge 1 －－－1.40 － 1.04 Before the confluence of June 5 July 13 June 5 July 13 June 5 July 13 2 3 the Abukuma River －－－－－－ Hirose River June 6 July 4 June 6 July 4 June 6 July 4 3 Tatenokoshi Bridge 4 －－－－－－ Before the confluence of June 5 July 13 June 5 July 13 June 5 July 13 4 Surikami River 5 the Abukuma River －－－0.97 － 1.16 Ken-poku Before the confluence of June 5 July 13 June 5 July 13 June 5 July 13 5 Arakawa River 6 the Abukuma River －－－－－－ June 17 July 8 June 17 July 8 June 17 July 8 6 Utsushi River Ozegawa Bridge 7 －－－－－0.86 June 17 July 8 June 17 July 8 June 17 July 8 7 Utsushi River Kuchibutogawa Bridge 8 (Tributary:Kuchibutogawa River) －－－－0.78 － Before the confluence of June 6 July 8 June 6 July 8 June 6 July 8 8 Gobyakugawa River 9 the Abukuma River －－－－－0.90 June 5 July 13 June 5 July 13 June 5 July 13 9 Abukuma River Akutsu Bridge 2 －－－2.00 － 1.95 Before the confluence of June 17 June 17 June 17 10 Osekawa River 10 the Abukuma River － 8.25 9.80 Before the confluence of June 16 June 16 June 16 11 Otakinekawa River 11 the Abukuma River －－－ Ken-chu Before the confluence of June 5 July 13 June 5 July 13 June 5 July 13 12 Shakadokawa River 12 the Abukuma River －－－－－－ June 21 July 8 June 21 July 8 June 21 July 8 13 Yashiro River Oji Bridge 13 －－－－－－ June 6 July 4 June 6 July 4 June 6 July 4 14 Natsui River Kitanouchi Bridge 14 －－－－－－ June 10 July 8 June 10 July 8 June 10 July 8 15 Ken-nan Kuji River Takachihara Bridge 15 －－－－－－ June 13 July 6 June 13 July 6 June 13 July 6 16 Miyako Bridge 16 －－－－－－ Agano River June 17 July 15 June 17 July 15 June 17 July 15 17 Aizu Shingo Dam 17 －－－－－－ June 15 June 15 June 15 18 Tadami River Fuji Bridge 18 －－－ June 16 July 11 June 16 July 11 June 16 July 11 19 Minamiaizu Agano River Tajima Bridge 19 －－－－－－ 1 / 7 Analysis results (Bq/L) Location № Region Name of river Sampling Points number Radioactive iodine Radioactive cesium I-131 Cs-134 Cs-137 June 14 June 14 June 14 20 Koizumi River Hyakken Bridge 20 －－1.50 June 14 July 7 June 14 July 7 June 14 July 7 21 Uda River Hyakken Bridge 21 －－－－－－ June 13 July 7 June 13 July 7 June 13 July 7 22 Mano River Majima Bridge 22 －－－－1.31 － June 17 July 8 June 17 July 8 June 17 July 8 23 Kusano 23 －－1.64 2.77 2.88 4.77 June 17 July 8 June 17 July 8 June 17 July 8 24 Sousou Komiya 24 －－2.03 3.08 1.95 3.26 Niida River June 20 June 20 June 20 25 Kidouchi Bridge 25 － 1.46 1.30 June 13 June 13 June 13 26 Sakekawa Bridge 26 － 1.59 2.44 June 8 July 14 June 8 July 14 June 8 July 14 27 Asami River Bouda Bridge 27 －－－－0.95 － June 17 July 8 June 17 July 8 June 17 July 8 28 Jizou River Hamahata Bridge 28 －－1.29 － 1.78 1.06 June 8 July 13 June 8 July 13 June 8 July 13 29 Ohisa River Kageiso Bridge 29 －－－－－－ June 8 July 13 June 8 July 13 June 8 July 13 30 Niida River Matsuba Bridge 30 －－－－0.83 － June 8 July 13 June 8 July 13 June 8 July 13 31 Natsui River Rokujumai Bridge 31 －－－－－－ Iwaki June 8 July 13 June 8 July 13 June 8 July 13 32 Fujiwara River Minato Ohashi Bridge 32 －－1.32 0.99 2.72 － June 8 July 13 June 8 July 13 June 8 July 13 33 Samegawa River Samegawa Bridge 33 －－－－－－ June 8 July 13 June 8 July 13 June 8 July 13 34 Binda River Binda Bridge 34 －－－－－－ ※ "-" indicates that the detected radioactivity concentration was lower than the detection limits. (The detection limits are approximately 1 Bq/L.) ※ Published in the first report in July 2 / 7 ○Water quality of lakes and dam reservoirs (Surveyed once a month: Survey started in June) Analysis results (Bq/L) Name of lakes and Location № Region Sampling Points Radioactive iodine Radioactive cesium dam reservoirs number I-131 Cs-134 Cs-137 Surikamigawa Dam June 1 July 6 June 1 July 6 June 1 July 6 1 Ken-poku Dam site 1 Reservoir －－－－－－ June 22 July 14 June 22 July 14 June 22 July 14 2 Lake Hatori Center of lake 2 －－－－－－ June 15 June 15 June 15 3 Ken-chu Miharu Dam Reservoir Dam site 4 －－－ June 7 July 7 June 7 July 7 June 7 July 7 4 Komachi Dam Inside reservoir 5 －－－－－－ June 8 July 7 June 8 July 7 June 8 July 7 5 Ken-nan Hokkawa Dam Dam site 6 －－－－－－ June 13 July 6 June 13 July 6 June 13 July 6 6 Okawa Dam Reservoir Center of lake 7 －－－－－－ July 15 July 15 July 15 7 Numazawa Lake Center of lake 8 －－－ June 8 July 12 June 8 July 12 June 8 July 12 8 Inawashiro Lake Center of lake 9 －－－－－－ June 9 July 6 June 9 July 6 June 9 July 6 9 Lake Hibara Center of lake 10 －－－－－－ June 9 July 6 June 9 July 6 June 9 July 6 10 Lake Onogawa Center of lake 11 －－－－－－ June 9 July 13 June 9 July 13 June 9 July 13 11 Aizu Lake Akimoto Center of lake 12 －－－－－－ June 9 July 13 June 9 July 13 June 9 July 13 12 Lake Sohara Center of lake 13 －－－－－－ July 15 July 15 July 15 13 Oguni Pond Center of lake 14 －－－ Bandai Center of Bishamon- June 9 July 13 June 9 July 13 June 9 July 13 14 15 Goshikinuma Lakes numa Pond －－－－－－ Higashiyama Dam June 9 June 9 June 9 15 Dam site 16 Reservoir －－－ June 9 July 14 June 9 July 14 June 9 July 14 16 Nicchu Dam Inside reservoir 17 －－－－－－ June 7 July 5 June 7 July 5 June 7 July 5 17 Ozenuma Pond Center of lake 18 －－－－－－ June 15 July 11 June 15 July 11 June 15 July 11 18 Minamiaizu Tagokura Reservoir Center of lake 20 －－－－－－ June 8 June 8 June 8 19 Tajima Dam Dam site 21 －－－ July 14 July 14 July 14 20 Sousou Mano Dam Inside reservoir 22 －－－ June 13 July 11 June 13 July 11 June 13 July 11 21 Shitoki Dam Dam site 23 －－－－－－ June 13 July 11 June 13 July 11 June 13 July 11 22 Iwaki Takashiba Dam Inside reservoir 24 －－－－－－ June 6 July 4 June 6 July 4 June 6 July 4 23 Kodama Dam Inside reservoir 25 －－－－－－ ※ "-" indicates that the detected radioactivity concentration was lower than the detection limits. (The detection limits are approximately 1 Bq/L.) ※ Published in the first report in July 3 / 7 ○Water quality of agricultural reservoirs (Surveyed once a month: survey started in June) Analysis results (Bq/L) Location № Region Name City number Radioactive iodine Radioactive cesium I-131 Cs-134 Cs-137 June 15 July 11 June 15 July 11 June 15 July 11 1 Handanuma Koori Town 1 －－－1.07 －－ Ken-poku June 14 July 12 June 14 July 12 June 14 July 12 2 Oike Motomiya City 2 －－－1.96 － 2.00 June 15 June 15 June 15 3 Kohei Sukagawa City 3 －－－ Ken-chu June 15 June 15 June 15 4 Takaranokusa Koriyama City 4 －－－ July 13 July 13 July 13 5 Watariike Yabuki City 5 －－－ Ken-nan June 13 July 13 June 13 July 13 June 13 July 13 6 Izumikawa Sirakawa City 6 －－－－－1.00 June 14 June 14 June 14 7 Onuma Nishi Aizu Town 7 －－－ Aizu June 14 June 14 June 14 8 Terairi Aizumisato Town 8 －－－ June 10 July 4 June 10 July 4 June 10 July 4 9 Minamiaizu Fukui Tadami Town 9 －－－－－－ June 15 July 12 June 15 July 12 June 15 July 12 10 Takei Shinchi Town 10 －－－－1.55 － Sousou June 15 July 12 June 15 July 12 June 15 July 12 11 Uchizawa Soma City 11 －－－－0.97 － June 9 July 5 June 9 July 5 June 9 July 5 12 Kanoritsutsumishita Iwaki City Taira 12 －－－－－－ Iwaki June 9 July 5 June 9 July 5 June 9 July 5 13 Shinike Iwaki City 13 －－－－－－ ※ "-" indicates that the detected radioactivity concentration was lower than the detection limits.