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Sand Data
cannon beach

The following data comes from various sand samples collected from designated spots along the northern, central and southern Oregon coast.  All of the samples are analyzed for cesium-137 and iodine-131 content. 

Coastal sand samples are collected and analyzed quarterly. Data is updated on the website once a month.   


Sand Analysis - Oregon 2014

Archive: Sand Analysis - Oregon 2013
Archive: Sand Analysis - Oregon 2012 

*Minimum Detectable Activity (MDA):  The MDA is defined as the smallest quantity of radioactivity that can be distinguished from background radiation under specified conditions.

Sample Date Sample Location Cesium - 137 Iodine - 131
Activity (pCi/L) Activity (pCi/L)
02/11/2014 Heceta Beach   *<MDA   *<MDA  
02/12/2014 Harris Beach   *<MDA   *<MDA  
02/14/2014 Oswald West    *<MDA   *<MDA  
05/10/2014 Harris Beach   *<MDA   *<MDA  
05/12/2014 Heceta Beach   *<MDA   *<MDA  
05/15/2014 Oswald West    *<MDA   *<MDA  
08/10/2014 Harris Beach *<MDA   *<MDA  
08/12/2014 Oswald West    *<MDA   *<MDA  
08/15/2014 Heceta Beach   *<MDA   *<MDA  
11/10/2014 Oswald West  *<MDA   *<MDA  
11/12/2014 Harris Beach *<MDA   *<MDA  
11/17/2014 Heceta Beach *<MDA   *<MDA  

Units: Picocurie (pCi): A unit of measurement that tells you the rate at which a sample of radioactive material decays.
1 pCi=0.037 Becquerel (Bq) = 2.22 disintegrations/minute.