Southern California had 2,500 Bq/kg of iodine-131 in seaweed — Over 500% higher than other tests in U.S., Canada

Published: March 30th, 2012 at 2:37 am ET
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UPDATED HERE: Study Author: California iodine-131 probably double or triple what we reported


Title: Canopy-Forming Kelps as California’s Coastal Dosimeter: 131I from Damaged Japanese Reactor Measured in Macrocystis pyrifera (ACS Publications)
Source: Environmental Science & Technology
Author: Steven L. Manley and Christopher G. Lowe, Department of Biological Sciences, California State University
Publication Date (Web): March 6, 2012

Corona Del Mar (Highest in Southern California)

  • 2.5 Bq/gdwt (gram dry weight)= 2,500 Bq/kg of dry seaweed

Santa Cruz (Highest in Central California)

  • 2.0 Bq/gdwt = 2,000 Bq/kg of dry seaweed

Simon Fraser University in Canada also tested North American seaweed after Fukushima:

  • “In samples of dehydrated seaweed taken on March 15 near the North Vancouver SeaBus terminal, the count was zero; on March 22 it was 310 Bq per kilogram; and by March 28 it was 380 Bq/kg.” -Vancouver Sun
  • Seaweed in Seattle also tested positive for iodine-131; levels were not reported -KIRO
  • No results after March 28 were reported
Published: March 30th, 2012 at 2:37 am ET
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