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.
