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. (The detection limits are approximately 1 Bq/L.) ※ Published in the first report in July

4 / 7 ○River sediment (Surveyed once in six months: survey started in May) Analysis results (Bq/kg) Location № Region Name of river Sampling Points number Radioactive iodine Radioactive cesium I-131 Cs-134 Cs-137 May 24* May 24* May 24* 1 Abukuma River Taisho Bridge 1 － 11,000 12,000 Before the confluence of May 24* May 24* May 24* 2 3 the Abukuma River － 4,300 4,700 Hirose River May 26* May 26* May 26* 3 Tatenokoshi Bridge 4 － 4,800 5,100 Before the confluence of May 24* May 24* May 24* 4 Surikami River 5 the Abukuma River － 1,000 1,100 Ken-poku Before the confluence of May 24* May 24* May 24* 5 Arakawa River 6 the Abukuma River － 4,200 4,600 May 26* May 26* May 26* 6 Utsushi River Ozegawa Bridge 7 － 1,100 1,300 May 26* May 26* May 26* 7 Utsushi River Kuchibutogawa Bridge 8 (Tributary:Kuchibutogawa River) － 3,400 3,700 Before the confluence of May 26* May 26* May 26* 8 Gobyakugawa River 9 the Abukuma River － 1,800 2,100 May 24* May 24* May 24* 9 Abukuma River Akutsu Bridge 2 － 260 290 Before the confluence of May 26* May 26* May 26* 10 Osekawa River 10 the Abukuma River － 850 950 Before the confluence of May 26* May 26* May 26* 11 Otakinekawa River 11 the Abukuma River － 120 140 Ken-chu Before the confluence of May 24* May 24* May 24* 12 Shakadokawa River 12 the Abukuma River － 1,100 1,200 May 26* May 26* May 26* 13 Yashiro River Oji Bridge 13 － 120 130 May 26* May 26* May 26* 14 Natsui River Kitanouchi Bridge 14 － 95 94 May 27 May 27 May 27 15 Ken-nan Kuji River Takachihara Bridge 15 － 130 140 May 27 May 27 May 27 16 Miyako Bridge 16 － 29 33 Agano River May 27 May 27 May 27 17 Aizu Shingo Dam 17 － 53 61 May 27 May 27 May 27 18 Tadami River Fuji Bridge 18 － 320 360 May 27 May 27 May 27 19 Minamiaizu Agano River Tajima Bridge 19 － 29 34

5 / 7 Analysis results (Bq/kg) Location № Region Name of river Sampling Points number Radioactive iodine Radioactive cesium I-131 Cs-134 Cs-137 May 29* May 29* May 29* 20 Koizumi River Hyakken Bridge 20 － 660 700 May 29* May 29* May 29* 21 Uda River Hyakken Bridge 21 － 48 51 May 29* May 29* May 29* 22 Mano River Majima Bridge 22 － 6,900 7,800 May 28* May 28* May 28* 23 Kusano 23 42 7,200 7,900 May 28* May 28* May 28* 24 Sousou Komiya 24 － 2,300 2,500 Niida River May 29* May 29* May 29* 25 Kidouchi Bridge 25 － 14,000 16,000 May 29* May 29* May 29* 26 Sakekawa Bridge 26 － 1,900 2,100 May 28* May 28* May 28* 27 Asami River Bouda Bridge 27 － 860 950 May 29* May 29* May 29* 28 Jizou River Hamahata Bridge 28 － 2,000 2,300 May 28* May 28* May 28* 29 Ohisa River Kageiso Bridge 29 － 2,200 2,300 May 28* May 28* May 28* 30 Niida River Matsuba Bridge 30 － 980 1,000 May 28* May 28* May 28* 31 Natsui River Rokujumai Bridge 31 － 190 220 Iwaki May 28* May 28* May 28* 32 Fujiwara River Minato Ohashi Bridge 32 － 660 730 May 28* May 28* May 28* 33 Samegawa River Samegawa Bridge 33 － 700 770 May 28* May 28* May 28* 34 Binda River Binda Bridge 34 － 97 110 ※ "-" indicates that the detected radioactivity concentration was lower than the detection limits. (The detection limits in the surveys by the Ministry of the Environment are 30 Bq/kg, and in the rest are approximately 15 Bq/kg) The surveys marked with * on the date were conducted by the Ministry of the Environment. Other surveys were conducted by ※ Fukushima Prefecture. ※ Published in the first report in July

6 / 7 ○Water quality of lakes and dam reservoirs (Surveyed once in six months: Survey started in June) Analysis results (Bq/kg) 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 June 1 June 1 1 Ken-poku Dam site 1 Reservoir － 127 132 June 22 June 22 June 22 2 Lake Hatori Center of lake 2 － 440 441 Miharu Dam June 15 June 15 June 15 3 Ken-chu Dam site 4 Reservoir － 107 107 June 7 June 7 June 7 4 Komachi Dam Inside reservoir 5 － 1,160 1,350 June 8 June 8 June 8 5 Ken-nan Hokkawa Dam Dam site 6 － 3,140 3,400 June 13 June 13 June 13 6 Okawa Dam Reservoir Center of lake 7 －－12.1 July 15 July 15 July 15 7 Numazawa Lake Center of lake 8 －－－ June 8 June 8 June 8 8 Inawashiro Lake Center of lake 9 －－－ June 9 June 9 June 9 9 Lake Hibara Center of lake 10 － 85.6 113 June 9 June 9 June 9 10 Lake Onogawa Center of lake 11 －－18.1 June 9 June 9 June 9 11Aizu Lake Akimoto Center of lake 12 －－12.5 June 9 June 9 June 9 12 Lake Sohara Center of lake 13 －－24.9 July 15 July 15 July 15 13 Oguni Pond Center of lake 14 － 55.7 70.8 Bandai Center of Bishamon- June 9 June 9 June 9 14 15 Goshikinuma Lakes numa Pond － 147 180 Higashiyama Dam June 9 June 9 June 9 15 Dam site 16 Reservoir － 70.8 78.1 June 9 June 9 June 9 16 Nicchu Dam Inside reservoir 17 －－－ June 7 June 7 June 7 17 Ozenuma Pond Center of lake 18 －－－ June 15 June 15 June 15 18 Minamiaizu Tagokura Reservoir Center of lake 20 － 103 112 June 8 June 8 June 8 19Tajima Dam Dam site 21 － 35.9 34.4 June 13 June 13 June 13 20 Shitoki Dam Dam site 23 － 261 302 June 13 June 13 June 13 21 Iwaki Takashiba Dam Inside reservoir 24 － 58.3 56.9 June 6 June 6 June 6 22 Kodama Dam Inside reservoir 25 －－－ ※ "-" indicates that the detected radioactivity concentration was lower than the detection limits. (The detection limits are approximately 15Bq/kg) ※ Published in the first report in July 7 / 7 Readings of Environmental Radiation Monitoring at Public Waters Location map

River Lake and dam reservoir Agricultural reservoir

Readings of Environmental Radiation Monitoring of Groundwater (Preliminary Report) 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 ○Monitoring period: July 1, 2011 - July 15, 2011 Analysis results (Bq/L) Address of № Region Sampling Point Sampling date Radioactive iodine Radioactive cesium Sampling Point I-131 Cs-134 Cs-137

1 Atamimachi Ishimushiro July 11 －－－ Ken-cyu Koriyama City 2 Osemachi Tadano July 11 －－－ ※ "-" indicates that the detected radioactivity concentration was lower than the detection limits. (The detection limits are approximately 1 Bq/L.) ※ Monitored this time

[Reference]

Published this Published in June 21 Published in July 7 Published in July 14 Total time (10 locations) (45 locations) (55 locations) (112 locations) (2 locations) Radioactive Not detected in any Not detected in Not detected in Not detected in Not detected in I-131 iodine locations any locations any locations any locations any locations Not detected in any Not detected in Not detected in Not detected in Not detected in Cs-134 Radioactive locations any locations any locations any locations any locations cesium Not detected in any Not detected in Not detected in Not detected in Not detected in Cs-137 locations any locations any locations any locations any locations

1/1 Map of groundwater-monitoring locations

Planned evacuation zones Emergency evacuation preparation zones