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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

St Croix County

54002 137 22 6 15.8
  54005 27 5 2 19.4
  54007 35 9 9 30.7
  54013 56 13 0 9.9
  54015 34 3 0 7.7
  54016 732 233 102 81.6
  54017 442 176 79 53.1
  54022 290 88 19 31.2
  54023 94 19 14 66.6
  54025 95 38 7 21.6
  54026 23 7 3 18.9
  54027 10 2 0 7.3
  54028 32 5 1 12.4
  54082 47 19 4 40.5
  54734 12 4 0 8.3
  54749 14 4 3 28.5
  54767 60 14 11 67.3

County Totals

 

2,140

661

260

 

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

 

 

 

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