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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 quarterly.   

Data:

Sand Analysis - 2015
Archive - 2014
Archive - 2013
Archive - 2012 


Sample Date Sample Location Cesium - 137 Iodine - 131
Activity (pCi/L) Activity (pCi/L)
02/10/2015 Oswald West    *<MDA   *<MDA  
02/13/2015 Harris Beach   *<MDA   *<MDA  
02/13/2015 Seal Rock   *<MDA   *<MDA  
​05/11/2015 Harris Beach​ *<MDA *<MDA
​05/13/2015 ​Oswald West *<MDA *<MDA
​05/15/2015 ​Heceta Beach *<MDA *<MDA


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

 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.