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Home > Education > Activities and Resources for Earth Science Teachers > Activity 10 > Radon levels map
GENERALIZED MAP OF MAINE SHOWING RADON LEVELS
(from C. T. Hess and others, 1979, Radon-222 in Potable Water Supplies in Maine: The Geology, Hydrology, Physics and Health Effects: Land and Water Resources Center, University of Maine, Orono, p. 78.)
Last updated on October 6, 2005
