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In 1990 and 1991, the North Carolina Department of Public
Instruction (DPI) assisted many schools in North Carolina with purchasing
radon canisters for the purpose of measuring classrooms in individual
schools. However, test results were never compiled statewide by DPI.
Individual schools' test results were retained by each school.
In 1997, North
Carolina Radiation Protection (NCRP) retrieved most of the survey data
from this previous project. In the spring of 1998, NCRP assisted with radon
testing in an additional 35 school districts which had no test data. Five
schools per district were tested.
Currently, survey data has
been compiled from 1,102 schools, with 23,448 classrooms tested in 94
counties (at least one school per county) out of 100 counties in North
Carolina.
The average radon level tested is: 1.79 pCi/l.
Based on NCRP analysis, approximately 11% of these tested
classrooms had radon concentrations greater than 4 pCi/l.
How are schools tested for radon?
Current data for NC Schools, by County
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