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Water Data
water faucet

The following data comes from water samples collected at various locations around the State of Oregon. All of the samples are analyzed for cesium-137 and iodine-131 content. Data is updated on the website monthly.

On this page:


Drinking Water

The following data was obtained from drinking water samples that were collected in Portland and at various locations along the  Oregon Coast. Samples are collected quarterly and are analyzed for cesium-137 and iodine-131 content. Data is updated on the website monthly.

Data:
 
Sample Date 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  
03/17/2014 Portland   *<MDA   *<MDA  
05/10/2014 Harris Beach   *<MDA   *<MDA  
05/12/2014 Driftwood Hotel   *<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  
08/05/2014 Portland *<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. 


Rain Water

The following data was obtained from rain water samples that were collected in Portland, Oregon. Samples are collected once a month and are analyzed for cesium-137 and iodine-131 content. Data is updated on the website monthly.

Data: 

Archive 2013
Archive 2012
Archive 2011 

Sample End Cesium - 137 Iodine - 131
Date Activity pCi/L Activity pCi/L
01/31/2014 No Data No Data
02/28/2014 *<MDA *<MDA
03/31/2014 *<MDA *<MDA
04/22/2014 *<MDA *<MDA
05/23/2014 *<MDA *<MDA
06/27/2014 *<MDA *<MDA
07/31/2014 *<MDA *<MDA
08/31/2014 **IQ **IQ
09/26/2014 *<MDA *<MDA
10/30/2014 *<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. 

** Insufficient Quantity:  There was not enough precipitation to complete the analysis. 

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. 
 

Sea Water

The following data was obtained from sea water samples that were collected from various locations along the Oregon Coast.  Samples are collected quarterly and are analyzed for cesium-137 and iodine-131 content.  Data is updated on the website monthly. 

Data:

Archive 2013
Archive 2012
Archive 2011

Sample Date 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  
*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.