A. Cracks in concrete slabs
B. Spaces behind brick veneer walls that rest on
uncapped hollow-block foundations
C. Pores and cracks in concrete blocks
D. Floor-wall joints
E. Exposed soil, as in a sump or crawl space
F. Weeping (drain) tile, if drained to an open sump
G. Mortar joints
H. Loose fitting pipe penetrations
I. Open tops of block walls
J. Building materials: brick, concrete, rock
K. Well water (if applicable)
Photo and information from the MN Department of Health
Information from the United States Environmental Protection Agency (EPA) and the Minnesota Department of Health were sources used for the content and some images in this website.
Do You Know If Your Home Has A Higher Than Normal Radon Level?
The Environmental Protection Agency recommends your radon level be no higher than 4 pCi/L (picocuries per liter). The only way to know your home's level is to test.
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How Radon Enters Your Home