2018
Yes
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6211050/#:~:text=There%20is%20currently%20no%20enforceable,funds%20when%20mitigation%20is%20needed.
Gordon, Kelsey
North America
Review
Radon
Radon exposure
Environmental health of schools
State policy
State regulations related to the testing, mitigation, and public dissemination of radon
levels in schools are inconsistent and the lack of nationwide indoor radon policy for schools may result in unacceptably high radon exposure levels in some US schools.
levels in schools are inconsistent and the lack of nationwide indoor radon policy for schools may result in unacceptably high radon exposure levels in some US schools.