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. (The detection limits are approximately 1Bq/L.)

※ Published in the first report in August

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

5 / 7 Analysis results (Bq/kg) № Region Name of river Sampling Points Radioactive iodine Radioactive cesium I-131 Cs-134 Cs-137 May 29* May 29* May 29* 20 Koizumi River Hyakken Bridge － 660 700 May 29* May 29* May 29* 21 Uda River Hyakken Bridge － 48 51 May 29* May 29* May 29* 22 Mano River Majima Bridge － 6,900 7,800 May 28* May 28* May 28* 23 Kusano 42 7,200 7,900 May 28* May 28* May 28* 24 Sousou Komiya － 2,300 2,500 Niida River May 29* May 29* May 29* 25 Kidouchi Bridge － 14,000 16,000 May 29* May 29* May 29* 26 Sakekawa Bridge － 1,900 2,100 May 28* May 28* May 28* 27 Asami River Bouda Bridge － 860 950 May 29* May 29* May 29* 28 Jizou River Hamahata Bridge － 2,000 2,300 May 28* May 28* May 28* 29 Ohisa River Kageiso Bridge － 2,200 2,300 May 28* May 28* May 28* 30 Niida River Matsuba Bridge － 980 1,000 May 28* May 28* May 28* 31 Natsui River Rokujumai Bridge － 190 220 Iwaki May 28* May 28* May 28* 32 Fujiwara River Minato Ohashi Bridge － 660 730 May 28* May 28* May 28* 33 Samegawa River Samegawa Bridge － 700 770 May 28* May 28* May 28* 34 Binda River Binda Bridge － 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 August

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 № Region Sampling Points Radioactive iodine Radioactive cesium dam reservoirs I-131 Cs-134 Cs-137 Surikamigawa Dam June 1 June 1 June 1 1 Ken-poku Dam site Reservoir － 127 132 June 22 June 22 June 22 2 Lake Hatori Center of lake － 440 441 Sengozawa Dam July 26 July 26 July 26 3 Dam site Reservoir － 334 371 Ken-chu Miharu Dam June 15 June 15 June 15 4 Dam site Reservoir － 107 107 June 7 June 7 June 7 5 Komachi Dam Inside reservoir － 1,160 1,350 June 8 June 8 June 8 6 Ken-nan Hokkawa Dam Dam site － 3,140 3,400 June 13 June 13 June 13 7 Okawa Dam Reservoir Center of lake －－12.1 July 15 July 15 July 15 8 Numazawa Lake Center of lake －－－ June 8 June 8 June 8 9 Inawashiro Lake Center of lake －－－ June 9 June 9 June 9 10 Lake Hibara Center of lake － 85.6 113 June 9 June 9 June 9 11 Lake Onogawa Center of lake －－18.1 June 9 June 9 June 9 12 Aizu Lake Akimoto Center of lake －－12.5 June 9 June 9 June 9 13 Lake Sohara Center of lake －－24.9 July 15 July 15 July 15 14 Oguni Pond Center of lake － 55.7 70.8 Bandai Center of Bishamon- June 9 June 9 June 9 15 Goshikinuma Lakes numa Pond － 147 180 Higashiyama Dam June 9 June 9 June 9 16 Dam site Reservoir － 70.8 78.1 June 9 June 9 June 9 17 Nicchu Dam Inside reservoir －－－ June 7 June 7 June 7 18 Ozenuma Pond Center of lake －－－ July 22 July 22 July 22 19 Okutadami Reservoir Center of lake － 38.9 69.1 Minamiaizu June 15 June 15 June 15 20 Tagokura Reservoir Center of lake － 103 112 June 8 June 8 6/8 21 Tajima Dam Dam site － 35.9 34.4

22 Sousou Mano Dam Inside reservoir

June 13 June 13 June 13 23 Shitoki Dam Dam site － 261 302 June 13 June 13 June 13 24 Iwaki Takashiba Dam Inside reservoir － 58.3 56.9 June 6 June 6 June 6 25 Kodama Dam Inside reservoir －－－ ※ "-" 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 August

7 / 7 Map of public water-monitoring locations

River (1-34) Lake and dam reservoir (1-25) Agricultural reservoir (1-13)

Readings of Environmental Radiation Monitoring of Groundwater (Preliminary Report)

○Monitoring period: Augst 1, 2011 - August 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 Nihonmatsu City Nagatatsumiuchi August 8 －－－

2 Ken-poku Date City Tsukidatemachi Tsukidate August 1 －－－ 3 Otama Village Tamai August 8 －－－ 4 Sukagawa City Shinanomachishita August 8 －－－ Ken-chu 5 Tamura City Yamane August 8 －－－ 6 Ken-nan Nishigo Village Habuto August 1 －－－ 7 Kitakata City Matsuyamamachi August 11 －－－ 8Aizu Inawashiro Town Misato August 8 －－－ 9 Kaneyama Town Honna August 10 －－－ 10 Soma City Yamakami August 10 －－－ 11 Sousou Haramachiku Oomika August 10 －－－ Minamisoma City 12 Kashimaku Etari August 10 －－－ ※ "-" 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 in Published in Published in Published in June 21 Published in July 7 July 14 July 21 August 4 (10 locations) (45 locations) (55 locations) (2 locations) (10 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

Published this time Total (12 locations) (134 locations)

Radioactive Not detected in any Not detected in I-131 iodine locations any locations Not detected in any Not detected in Cs-134 Radioactive locations any locations cesium Not detected in any Not detected in Cs-137 locations any locations

1/1 Map of groundwater-monitoring locations

Planned evacuation zones Emergency evacuation preparation zones