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RADON MEASUREMENTS TABLE BY COUNTY AND ZIP CODE

The numbers of results at various radon levels, tabulated below, are from measurements in basements, up to a week in duration, while windows are kept closed.  Because there is less radon upstairs and less when windows are open, this table represents neither average resident exposures nor their lung cancer risks from radon.

The data were obtained over many years, largely from companies that sell radon detectors to the public, and are only a fraction of all radon measurements that have been made in Wisconsin.

Estimate the fraction of houses with average occupant exposures (house bottom to top) greater than 4 pCi/L for the radon averaged over a year: divide the number in the “>10 pCi/L” column by the “Total No.” (of measurements) column.  (Average between basement and 1st floor: 40%)  For further information on the relationship,  click here.

The data listed for Zip Codes crosses county borders.

Wisconsin Measurement Summary - 2009

Numbers of Measurements versus Radon:

 

County

Zip
Code

No. of Measurements

High
pCi\L

Total
No.

# 4 - 10
pCi\L*

# >10
pCi\L

Bayfield County

54806 148 22 3 12.8
  54814 87 4 9 51.7
  54820 5 1 0 4.0
  54821 28 10 0 8.5
  54827 10 0 0 3.7
  54832 7 4 0 6.3
  54838 9 3 0 5.0
  54839 5 2 0 4.1
  54844 8 0 1 14.5
  54847 40 12 5 30.1
  54856 29 0 0 3.3
  54865 4 0 1 11.9
  54873 26 6 1 12.5
  54891 159 23 10 29.2

County Totals

 

565

87

30

 

         * pCi/L: picoCuries per Liter, a way to measure radon concentration

 

 

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