Radon Measurements for Washington County   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.   Washington County Measurement Summary - 2006 Numbers of Measurements versus Radon: No. of Measurements Zip Code Total No.      # 4 - 10 pCi/L* # >10 pCi/L Ave. pCi/L High pCi/L 53002 53010 53012 53017 53021 53022 53027 53033 53037 53040 53060 53076 53078 53086 53090 56091 53095 16 43 453 292 41 309 201 131 63 55 5 63 10 86 99 10 525 6 13 175 84 13 112 74 44 26 14 2 30 6 33 35 4 149   0 2 55 124 2 40 35 40 3 5 0 12 0 21 3 5 61 3.5 3.8 5.3 13.8 3.9 5.3 7.1 8.8 4.3 3.9 3.3 7.3 4.6 7.3 4.7 14.0 5.1  7.5 13.0 29.4 120.0 12.4 31.2 56.6 80.0 11.9 22.5 6.9 26.2 7.9 28.7 54.7 27.6 62.8 Zip Code      No. of Measurements      Ave. pCi/L      High pCi/L Total No.     # 4 - 10 pCi/L*     # >10 pCi/L * pCi/L: picoCuries per Liter, a measure of radon concentration The data were obtained 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. For estimating the fraction of houses with average occupant exposures greater than 4 pCi/L for the radon averaged over a year on the main floor: divide the number in the ">10 pCi/L" column by the number in the "Total No." (of measurements) column. The data listed for Zip Codes crosses county borders. Information provided by the Wisconsin Department of Health and Family Services.