Readings of Environmental Radiation Monitoring of Public Water Areas (Preliminary Report) August 19, 2011 Nuclear Emergency Response Headquarters (Radioactivity Team) Disaster Provision Main Office of Fukushima Pref. (Nuclear Power Team) 1 Date Monday, August 1 – Thursday, August 11, 2011 2 Number of monitoring locations Rivers: 26 locations (water quality) Lakes and dam reservoirs: 12 locations (water quality) Agricultural reservoirs: 11 locations (water quality) Groundwater: 12 locations (water quality) 3 Monitoring Results (1) Rivers (water quality) Radioactive iodine: Not detected in any locations Radioactive cesium: Cs-134 Not detected – 1.50 Bq/L Cs-137 Not detected – 1.65 Bq/L (2) Lakes and dam reservoirs (water quality) Radioactive iodine: Not detected Radioactive cesium: Not detected (3) Agricultural reservoirs (water quality) Radioactive iodine: Not detected in any locations Radioactive cesium: Not detected in any locations (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 August) August 19, 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) № Region Name of river Sampling Points Radioactive iodine Radioactive cesium I-131 Cs-134 Cs-137 July 13 August 3 July 13 August 3 July 13 August 3 1 Abukuma River Taisho Bridge －－1.40 － 1.04 － Before the confluence of July 13 August 3 July 13 August 3 July 13 August 3 2 the Abukuma River －－－－－－ Hirose River July 4 August 2 July 4 August 2 July 4 August 2 3 Tatenokoshi Bridge －－－－－－ Before the confluence of July 13 August 3 July 13 August 3 July 13 August 3 4 Surikami River the Abukuma River －－0.97 － 1.16 － Ken-poku Before the confluence of July 13 August 3 July 13 August 3 July 13 August 3 5 Arakawa River the Abukuma River －－－－－－ July 8 July 8 July 8 6 Utsushi River Ozegawa Bridge －－0.86 Utsushi River July 8 July 8 July 8 7 (Tributary:Kuchibutogawa Kuchibutogawa Bridge River) －－－ Before the confluence of July 8 August 2 July 8 August 2 July 8 August 2 8 Gobyakugawa River the Abukuma River －－－－0.90 － July 13 August 3 July 13 August 3 July 13 August 3 9 Abukuma River Akutsu Bridge －－2.00 － 1.95 1.18 Before the confluence of July 27 August 10 July 27 August 10 July 27 August 10 10 Osekawa River the Abukuma River －－－－－－ Before the confluence of July 27 August 10 July 27 August 10 July 27 August 10 11 Otakinekawa River the Abukuma River －－－－－－ Ken-chu Before the confluence of July 13 August 3 July 13 August 3 July 13 August 3 12 Shakadokawa River the Abukuma River －－－－－－ July 8 August 5 July 8 August 5 July 8 August 5 13 Yashiro River Oji Bridge －－－－－－ July 4 August 2 July 4 August 2 July 4 August 2 14 Natsui River Kitanouchi Bridge －－－－－－ July 8 August 1 July 8 August 1 July 8 August 1 15 Ken-nan Kuji River Takachihara Bridge －－－－－－ July 6 July 6 July 6 16 Miyako Bridge －－－ Agano River July 15 August 11 July 15 August 11 July 15 August 11 17 Aizu Shingo Dam －－－－－－ July 22 July 22 July 22 18 Tadami River Fuji Bridge －－－ July 11 July 11 July 11 19 Minamiaizu Agano River Tajima Bridge －－－ 1 / 7 Analysis results (Bq/L) № Region Name of river Sampling Points Radioactive iodine Radioactive cesium I-131Cs-134 Cs-137 July 19 August 4 July 19 August 4 July 19 August 4 20 Koizumi River Hyakken Bridge －－1.18 － 1.30 － July 7 August 4 July 7 August 4 July 7 August 4 21 Uda River Hyakken Bridge －－－－－－ July 7 August 4 July 7 August 4 July 7 August 4 22 Mano River Majima Bridge －－－－－－ July 8 July 8 July 8 23 Kusano － 2.77 4.77 July 8 July 8 July 8 24 Sousou Komiya － 3.08 3.26 Niida River July 19 August 4 July 19 August 4 July 19 August 4 25 Kidouchi Bridge －－－1.09 － 1.40 July 19 August 4 July 19 August 4 July 19 August 4 26 Sakekawa Bridge －－－1.50 － 1.65 July 14 August 2 July 14 August 2 July 14 August 2 27 Asami River Bouda Bridge －－－－－－ July 8 July 8 July 8 28 Jizou River Hamahata Bridge －－1.06 July 13 August 3 July 13 August 3 July 13 August 3 29 Ohisa River Kageiso Bridge －－－－－－ July 13 August 3 July 13 August 3 July 13 August 3 30 Niida River Matsuba Bridge －－－－－－ July 13 August 3 July 13 August 3 July 13 August 3 31 Natsui River Rokujumai Bridge －－－－－－ Iwaki July 13 August 3 July 13 August 3 July 13 August 3 32 Fujiwara River Minato Ohashi Bridge －－0.99 －－－ July 13 August 3 July 13 August 3 July 13 August 3 33 Samegawa River Samegawa Bridge －－－－－－ July 13 August 3 July 13 August 3 July 13 August 3 34 Binda River Binda Bridge －－－－－－ ※ "-" indicates that the detected radioactivity concentration was lower than the detection limits. (The detection limits are approximately 1Bq/L.) ※ Published in the first report in August 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 № Region Sampling Points Radioactive iodine Radioactive cesium dam reservoirs I-131 Cs-134 Cs-137 Surikamigawa Dam July 6 August 3 July 6 August 3 July 6 August 3 1 Ken-poku Dam site Reservoir －－－－－－ July 14 August 5 July 14 August 5 July 14 August 5 2 Lake Hatori Center of lake －－－－－－ Sengozawa Dam July 26 July 26 July 26 3 Dam site Reservoir －－－ Ken-chu July 20 July 20 July 20 4 Miharu Dam Reservoir Dam site －－－ July 7 August 3 July 7 August 3 July 7 August 3 5 Komachi Dam Inside reservoir －－－－－－ July 7 August 11 July 7 August 11 July 7 August 11 6 Ken-nan Hokkawa Dam Dam site －－－－－－ July 6 July 6 July 6 7 Okawa Dam Reservoir Center of lake －－－ July 15 August 10 July 15 August 10 July 15 August 10 8 Numazawa Lake Center of lake －－－－－－ July 12 August 10 July 12 August 10 July 12 August 10 9 Inawashiro Lake Center of lake －－－－－－ July 6 July 6 July 6 10 Lake Hibara Center of lake －－－ July 6 July 6 July 6 11 Lake Onogawa Center of lake －－－ July 13 July 13 July 13 12 Aizu Lake Akimoto Center of lake －－－ July 13 July 13 July 13 13 Lake Sohara Center of lake －－－ July 15 August 10 July 15 August 10 July 15 August 10 14 Oguni Pond Center of late －－－－－－ Bandai Center of Bishamon- July 13 July 13 July 13 15 Goshikinuma Lakes numa Pond －－－ Higashiyama Dam July 19 July 19 July 19 16 Dam site Reservoir －－－ July 14 August 11 July 14 August 11 July 14 August 11 17 Nicchu Dam Inside reservoir －－－－－－ July 5 August 9 July 5 August 9 July 5 August 9 18 Ozenuma Pond Center of lake －－－－－－ July 22 July 22 July 22 19 Okutadami Reservoir Center of lake －－－ Minamiaizu July 11 July 11 July 11 20 Tagokura Reservoir Center of lake －－－ July 25 July 25 July 25 21 Tajima Dam Dam site －－－ July 14 July 14 July 14 22 Sousou Mano Dam Inside reservoir －－－ July 11 August 8 July 11 August 8 July 11 August 8 23 Shitoki Dam Dam site －－－－－－ July 11 August 8 July 11 August 8 July 11 August 8 24 Iwaki Takashiba Dam Inside reservoir －－－－－－ July 4 August 1 July 4 August 1 July 4 August 1 25 Kodama Dam Inside reservoir －－－－－－ ※ "-" indicates that the detected radioactivity concentration was lower than the detection limits. (The detection limits are approximately 1Bq/L.) ※ Published in the first report in August 3 / 7 ○Water quality of agricultural reservoirs (Surveyed once a month: survey started in June) Analysis results (Bq/L) № Region Name City Radioactive iodine Radioactive cesium I-131 Cs-134 Cs-137 July 11 August 9 July 11 August 9 July 11 August 9 1 Handanuma Koori Town －－1.07 －－－ Ken-poku July 12 August 9 July 12 August 9 July 12 August 9 2 Oike Motomiya City －－1.96 － 2.00 － July 26 July 26 July 26 3 Kohei Sukagawa City －－－ Ken-chu July 26 July 26 July 26 4 Takaranokusa Koriyama City －－－ July 13 August 10 July 13 August 10 July 13 August 10 5 Watariike Yabuki City －－－－－－ Ken-nan July 13 August 10 July 13 August 10 July 13 August 10 6 Izumikawa Sirakawa City －－－－1.00 － July 7 August 11 July 7 August 11 July 7 August 11 7 Onuma Nishi Aizu Town －－－－－－ Aizu July 7 August 11 July 7 August 11 July 7 August 11 8 Terairi Aizumisato Town －－－－－－ July 4 August 8 July 4 August 8 July 4 August 8 9 Minamiaizu Fukui Tadami Town －－－－－－ July 12 August 10 July 12 August 10 July 12 August 10 10 Takei Shinchi Town －－－－－－ Sousou July 12 August 10 July 12 August 10 July 12 August 10 11 Uchizawa Soma City －－－－－－ July 5 August 9 July 5 August 9 July 5 August 9 12 Kanoritsutsumishita Iwaki City Taira －－－－－－ Iwaki July 5 August 9 July 5 August 9 July 5 August 9 13 Shinike Iwaki City －－－－－－ ※ "-" indicates that the detected radioactivity concentration was lower than the detection limits.