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(>4)(2-4)(<2)
(1988, 1990)
Geologyof West Virginia
764 West Virginia Zip Codes
• 19,914 measurements• 1998-2003• 540 of 764 zip codes (71%)• Estimated 4.4% of residences
Zip Codes with 5 or more
Measurements:361 of 764 (47%)
Zip codes with Median Radon Exceeding US EPA Action level (4 pCi/L):
41 of 361 (11%)
Zip codes with > 40% of Measurements Exceeding US EPA
Action level (4 pCi/L):100 of 540 (19%)
0.0
10.0
20.0
30.0
40.0
50.0
60.0
Per
cen
t E
leva
ted
Rad
on
Percent Elevated Radon Measurements as a Function of Dominant Bedrock Type In WV Zip Codes
n = 16
n = 1n = 16
n =165
n = 340
75th percentile
25th percentile
50th percentile