EPA recommends that all schools nationwide be tested for radon. To date, approximately 20% of the schools nationwide have done some testing.
Some states have tested all their public schools.
A nationwide survey of radon levels in schools estimates that nearly one in
five has at least one schoolroom with a short-term radon level above the action level of 4 pCi/L (picoCuries per liter) - the level at which EPA recommends that schools take action to reduce the level. EPA estimates that more than 70,000 schoolrooms in use today have high short-term radon levels.
"EPA's national survey of schools produced some alarming results about concentrations in our children's classrooms. Public awareness must be raised about the hazards of radon to hasten efforts to reduce the danger. All schools must be tested to determine if there is a problem, and schools must inform parents of the results. We cannot ignore this problem."
Kathryn Whitfill, National PTA President.
A Brief Review
of State Laws and Regulations in the U.S.
September 2018
International Journal of Environmental Research and Public Health 15(10):2149