Radon zones in Wisconsin
Zone 1: 28, Zone 2: 44, Zone 3: 0. A zone is an area estimate; EPA says all homes should be tested.
- Adams County Zone 2
- Ashland County Zone 2
- Barron County Zone 2
- Bayfield County Zone 2
- Brown County Zone 2
- Buffalo County Zone 1
- Burnett County Zone 2
- Calumet County Zone 2
- Chippewa County Zone 2
- Clark County Zone 2
- Columbia County Zone 2
- Crawford County Zone 1
- Dane County Zone 1
- Dodge County Zone 1
- Door County Zone 1
- Douglas County Zone 2
- Dunn County Zone 2
- Eau Claire County Zone 2
- Florence County Zone 2
- Fond du Lac County Zone 1
- Forest County Zone 2
- Grant County Zone 1
- Green County Zone 1
- Green Lake County Zone 1
- Iowa County Zone 1
- Iron County Zone 2
- Jackson County Zone 2
- Jefferson County Zone 1
- Juneau County Zone 2
- Kenosha County Zone 2
- Kewaunee County Zone 2
- La Crosse County Zone 2
- Lafayette County Zone 1
- Langlade County Zone 1
- Lincoln County Zone 2
- Manitowoc County Zone 2
- Marathon County Zone 1
- Marinette County Zone 2
- Marquette County Zone 2
- Menominee County Zone 1
- Milwaukee County Zone 2
- Monroe County Zone 2
- Oconto County Zone 2
- Oneida County Zone 2
- Outagamie County Zone 2
- Ozaukee County Zone 2
- Pepin County Zone 1
- Pierce County Zone 1
- Polk County Zone 2
- Portage County Zone 1
- Price County Zone 2
- Racine County Zone 2
- Richland County Zone 1
- Rock County Zone 1
- Rusk County Zone 2
- St. Croix County Zone 1
- Sauk County Zone 2
- Sawyer County Zone 2
- Shawano County Zone 1
- Sheboygan County Zone 2
- Taylor County Zone 2
- Trempealeau County Zone 2
- Vernon County Zone 1
- Vilas County Zone 2
- Walworth County Zone 1
- Washburn County Zone 2
- Washington County Zone 1
- Waukesha County Zone 1
- Waupaca County Zone 1
- Waushara County Zone 2
- Winnebago County Zone 2
- Wood County Zone 1
County not listed? See what we left out and why. Leave your email to hear if this data changes.