Los Angeles, Calif. - 0.39 pCi/l (4/4/11)
Philadelphia (Baxter), Penn. - 0.46 pCi/l (4/4/11)
Philadelphia (Belmont), Penn. - 1.3 pCi/l (4/4/11)
Philadelphia (Queen), Penn. - 2.2 pCi/l (4/4/11)
Muscle Shoals, Al. - 0.16 pCi/l (3/31/11)
Niagara Falls, NY - 0.14 pCi/l (3/31/11)
Denver, Colo. - 0.17 pCi/l (3/31/11)
Detroit, Mich. - 0.28 pCi/l (3/31/11)
East Liverpool, Oh. - 0.42 pCi/l (3/30/11)
Trenton, NJ - 0.38 pCi/l (3/29/11)
Painesville, Oh. - 0.43 pCi/l (3/29/11)
Columbia, Penn. - 0.20 pCi/l (3/29/11)
Oak Ridge (4442), Tenn. - 0.28 pCi/l (3/29/11)
Oak Ridge (772), Tenn. - 0.20 pCi/l (3/29/11)
Oak Ridge (360), Tenn. - 0.18 pCi/l (3/29/11)
Helena, Mont. - 0.18 pCi/l (3/28/11)
Waretown, NJ - 0.38 pCi/l (3/28/11)
Cincinnati, Oh. - 0.13 pCi/l (3/28/11)
Pittsburgh, Penn. - 0.36 pCi/l (3/28/11)
Oak Ridge (371), Tenn. - 0.63 pCi/l (3/28/11)
Chattanooga, Tenn. - 1.6 pCi/l (3/28/11)
Boise, Id. - 0.2 pCi/l (3/28/11)
Richland, Wash. - 0.23 pCi/l (3/28/11)
Source: naturalnews.