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Japanese Nuclear Emergency: Radiation Monitoring

Daily Data Summary Last updated on Tuesday, March 29, 2011 at 11:49:12 AM.

As the Nuclear Regulatory Commission has said, we do not expect to see radiation at harmful levels reaching the U.S. from damaged Japanese nuclear power plants. As part of the federal government's continuing effort to make our activities and science transparent and available to the public, the Environmental Protection Agency (EPA) will continue to keep all RadNet data available in the current online database. EPA is working with its federal partners and has deployed additional monitors to Hawaii, Alaska, Guam and the Northern Mariana Islands.

EPA is utilizing this existing nationwide radiation monitoring system, RadNet, which continuously monitors the nation's air and regularly monitors drinking water, milk and precipitation for environmental radiation. The RadNet online searchable database contains historical data of environmental radiation monitoring data from all fifty states and U.S. territories.

EPA will provide daily data summaries of our radiation air monitoring efforts. We will continue to keep all RadNet data available in the current online database.

March 29, 2011 As of 8:30am (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

March 28, 2011 As of 12:30pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

As of 8:30am (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

March 27, 2011 As of 8:30am (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

March 26, 2011 As of 12:00pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

As of 8:00am (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

March 25, 2011 As of 1:00pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

As of 9:00am (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

March 24, 2011 As of 1:00pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

On Monday, March 21 - preliminary monitor results in Hawaii detected minuscule levels of an isotope that were consistent with the Japanese nuclear incident. This detection varied from background and historical data in Hawaii. This isotope was detected at our fixed monitor in Hawaii, and it was far below any level of concern for human health. The sampling filter from this monitor has been sent to our national radiation lab for further analysis.

March 23, 2011 As of 5:00pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

On Monday, March 21 - preliminary monitor results in Hawaii detected minuscule levels of an isotope that were consistent with the Japanese nuclear incident. This detection varied from background and historical data in Hawaii. This isotope was detected at our fixed monitor in Hawaii, and it was far below any level of concern for human health. The sampling filter from this monitor has been sent to our national radiation lab for further analysis.

As of 1:00pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

On Monday, March 21 - preliminary monitor results in Hawaii detected minuscule levels of an isotope that were consistent with the Japanese nuclear incident. This detection varied from background and historical data in Hawaii. This isotope was detected at our fixed monitor in Hawaii, and it was far below any level of concern for human health. The sampling filter from this monitor has been sent to our national radiation lab for further analysis.

March 22, 2011 As of 6:30pm (EDT) Last night preliminary monitor results in Hawaii detected minuscule levels of an isotope that is consistent with the Japanese nuclear incident. This detection varies from background and historical data in Hawaii. This isotope was detected at our fixed monitor in Hawaii, and it is far below any level of concern for human health. The sampling filter from this monitor is being sent to our national radiation lab for further analysis.

EPA's RadNet radiation air monitors across the rest of the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

March 21, 2011 As of 1:00pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

As of 9:00am (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

March 20, 2011 As of 1:00pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

As of 9:00am (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

March 19, 2011 As of 11:30am (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

As of 8:30am (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

March 18, 2011 As of 4:00pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

As of 12:00pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

March 17, 2011 As of 2:00pm (EDT) EPA's RadNet radiation air monitors across the U.S. show typical fluctuations in background radiation levels. The levels detected are far below levels of concern.

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