Radon Measurements by Zip Code

The table and map below shows averages by zip code, based on do-it-yourself tests residents have done through Health Department/municipal test kits and results found by certified radon measurement contractor Cutter Vac.

A measurement over 4pCi/L is considered high and warrants mitigation.

Find a test kit and test yourself, or contact a certified radon measurement professional.

Zip Code – Region Number of Tests Average Radon Measurement in pCi/L (2007-2015)
53931 – Fairwater 6 16.5
53963 – Waupun 17 16.0
53919 – Brandon 22 9.0
53019 – Eden 13 7.1
54971 – Ripon 182 7.0
53010 – Campbellsport 51 6.8
54974 – Rosendale 8  6.7
53049 – Malone 10 6.6
53065 – Oakfield 31 6.4
54937 – North Fond du Lac 269 5.9
53057 – Mt. Calvary 13 5.8
54979 – Van Dyne 2 2.8
54936 – Fond du Lac 1 2.7
53079 – St. Cloud 1 2.4
54935 – Fond du Lac (city) 346 2.3
54932 – Eldorado 2 .9

View a map of average radon readings by zip code in Fond du Lac County.

Radon is a naturally-occurring radioactive gas and the leading cause of lung cancer among non-smokers when it is concentrated indoors. Certain regions tend to have higher readings than others because of the amount of uranium decomposing in the soil there. All homes should be checked for radon, because all homes have slightly different soils underneath and construction types.

If radon measurements are at 4pC/L or above, contact a certified radon mitigation professional to fix your home.