Readings of Environmental Radiation Monitoring of Public Water Areas (Preliminary Report) September 9, 2011 Nuclear Emergency Response Headquarters (Radioactivity Team) Disaster Provision Main Office of Fukushima Pref. (Nuclear Power Team) 1 Date Wednesday, August 17 – Wednesday, August 31, 2011 2 Number of monitoring locations Rivers: 8 locations (water quality) Lakes and dam reservoirs: 13 locations (water quality) Lakes and dam reservoirs: 1 location (bottom sediment) 3 Monitoring Results (1) Rivers (water quality) Radioactive iodine: Not detected in any locations Radioactive cesium: Cs-134 Not detected – 1.60 Bq/L Cs-137 Not detected – 2.15 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-134 338 Bq/L Cs-137 405 Bq/L *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. (Nuclear Power Team, Monitoring Team: 024-521-6938) Readings of Environmental Radiation Monitoring at Rivers, Lakes, Dam Reservoirs, and Agricultural Reservoirs（Preliminary Report）(Second report in August) September 9, 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 － Kenpoku Before the confluence of July 13 August 3 July 13 August 3 July 13 August 3 5 Arakawa River the Abukuma River －－－－－－ July 8 August 17 July 8 August 17 July 8 August 17 6 Utsushi River Ozegawa Bridge －－－－0.86 － Utsushi River July 8 August 17 July 8 August 17 July 8 August 17 7 (Tributary:Kuchibutogawa Kuchibutogawa Bridge River) －－－－－－ Before the confluence of July 8 August 2 July 8 August 2 July 8 August 2 8 Gobyaku 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 －－－－－－ Kenchu 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 Kennan Kuji River Takachihara Bridge －－－－－－ July 6 August 31 July 6 August 31 July 6 August 31 16 Miyako Bridge －－－－－－ Agano River July 15 August 11 July 15 August 11 July 15 August 11 17 Aizu Shingo Dam －－－－－－ July 22 August 22 July 22 August 22 July 22 August 22 18 Tadami River Fuji Bridge －－－－－－ July 11 August 17 July 11 August 17 July 11 August 17 19 Minamiaizu Agano River Tajima Bridge －－－－－－ 1 / 7 Analysis results (Bq/L) № Region Name of river Sampling Points Radioactive iodine Radioactive cesium I-131 Cs-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 August 17 July 8 August 17 July 8 August 17 23 Kusano －－2.77 1.60 4.77 2.15 July 8 August 17 July 8 August 17 July 8 August 17 24 Sousou Komiya －－3.08 0.85 3.26 1.28 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 August 17 July 8 August 17 July 8 August 17 28 Jizou River Hamahata Bridge －－－1.18 1.06 1.26 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 second 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 Kenpoku 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 August 25 July 26 August 25 July 26 August 25 3 Dam site Reservoir －－－－－－ Kenchu July 20 August 17 July 20 August 17 July 20 August 17 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 Kennan Hokkawa Dam Dam site －－－－－－ July 6 August 24 July 6 August 24 July 6 August 24 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 August 19 July 6 August 19 July 6 August 19 10 Lake Hibara Center of lake －－－－－－ July 6 August 19 July 6 August 19 July 6 August 19 11 Lake Onogawa Center of lake －－－－－－ July 13 August 19 July 13 August 19 July 13 August 19 12 Aizu Lake Akimoto Center of lake －－－－－－ July 13 August 19 July 13 August 19 July 13 August 19 13 Lake Sohara Center of lake －－－－－－ July 15 August 10 July 15 August 10 July 15 August 10 14 Oguni Pond Center of late －－－－－－ Center of Bandai July 13 August 19 July 13 August 19 July 13 August 19 15 Bishamon-numa Goshikinuma Lakes －－－－－－ Pond Higashiyama Dam July 19 August 18 July 19 August 18 July 19 August 18 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 August 24 July 22 August 24 July 22 August 24 19 Okutadami Reservoir Center of lake －－－－－－ Minamiaizu July 11 August 17 July 11 August 17 July 11 August 17 20 Tagokura Reservoir Center of lake －－－－－－ July 25 August 18 July 25 August 18 July 25 August 18 21 Tajima Dam Dam site －－－－－－ July 14 August 18 July 14 August 18 July 14 August 18 22Sousou 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 second report in August 3 / 7 ○Water quality of agricultural 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 July 11 August 9 July 11 August 9 July 11 August 9 1Handanuma Koori Town －－January 1 －－－ Kenpoku July 12 August 9 July 12 August 9 July 12 August 9 2 Oike Motomiya City －－January 1 － January 2 － July 26 July 26 July 26 3 Kohei Sukagawa City －－－ Kenchu 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 －－－－－－ Kennan July 13 August 10 July 13 August 10 July 13 August 10 6 Izumikawa Sirakawa City －－－－January 1 － 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.