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Air Monitoring Stations

This is archived information from the 2011 Japan Radiation Event (March 11, 2011 to May 15, 2011). This information is no longer being updated as this is not considered a local hazard at this time.

See ongoing air monitoring data provided by Radiation Protection Services.


Average Daily Readings

All measurements in gross beta.

 

 May 2011

 Date

 Portland

 Corvallis

 Eureka, CA

05/12/2011

19.6

22.0

7.0

05/08/2011

11.7

17.0

9.8

05/05/2011

15.8

16.9

17.8

05/02/2011

27.15

22.86

22.93

Monthly Average

15.6

17.4

13.4

 April 2011

 Date

 Portland

 Corvallis

 Eureka, CA

04/27/2011

10.9

16.8

6.4

04/25/2011

17.9

21.0

6.5

04/21/2011

No data*

18.5

6.5

04/17/2011

13.1

17.9

No data*

04/14/2011

13.1

15.9

6.1

04/10/2011

15.8

20.1

16.4

04/07/2011

17.3

24.0

10.7

04/06/2011

11.3

16.3

12.0

04/05/2011

14.1

15.7

13.2

04/04/2011

No data*

28.8

27.8

04/01/2011 - 04/03/2011

No data*

 19.5

 15.4

Monthly Average

14.6

19.2

10.7

March 2011

 Date

 Portland

 Corvallis

 eureka, CA

03/31/2011

19.6

18.4

15.3

03/30/2011

13.1

15.0

22.8

03/29/2011

13.7

16.7

16.9

03/28/2011

No data*

20.0

15.0

03/27/2011

No data*

15.8

14.3

03/26/2011

17.3

17.4

14.1

03/25/2011

40.6

19.5

12.5

03/24/2011

20.2

21.4

12.0

03/23/2011

19.5

19.6

13.5

03/22/2011

14.9

24.5

15.3

03/21/2011

23.4

32.3

15.2

03/20/2011

 18.3

 21.4

 24.0

03/19/2011

 16.7

 24.7

 12.7

03/18/0211

 16.5

 18.5

 11.7

03/17/2011

 13.9

 20.5

 13.7

03/16/2011

 12.8

 18.7

 9.7

03/15/2011

14.6

 19.3

 14.4

03/14/2011

 46.6

 19.3

 15.6

03/13/2011

 19.4

 23.2

 10.5

03/12/2011

 17.5

 21.9

 13.5

03/11/2011

 19.0

 19.8

 20.2

03/10/2011

 15.3

 15.6

 11.0

03/09/2011

 13.5

 14.7

 12.4

03/08/2011

 14.3

 18.3

 12.7

03/07/2011

 24.8

 31.3

 12.7

03/06/2011

 23.7

 25.8

 13.3

03/05/2011

 18.0

 22.6

 13.0

03/04/2011

 15.2

 24.2

 12.2

03/03/2011

 12.7

 17.6

 17.7

03/02/2011

 20.4

 21.7

 11.0

03/01/2011

 20.4

 20.5

10.3

Monthly Average

19.2

20.6

14.2

*No data available from EPA