% of
Counties
Time
Designat
State
ed as Radon
EPA Test
Zone 1
or Zone
Requireme
nt for
Initial
Testing
Freque
ncy of Type of School
Re- Covered
Testing
Who New
May School
Conduc RRNC
t the Requirem
Testing ent
Mitigation
Requirement for
Radon Level ≤ 4
pCi/L
2 a
Virginia
occupancy
years
Open in a separate window
ND: Not Defined; SE: School Employees; CF: Certified Professionals. a : Based on USEPA Radon
Map https://www.epa.gov/radon/find-information-about-local-radon-zones-and-state-contact-
information#radonmap. b : All schools in continuous use since before 1 July 1994 must test 100%
first floor or below grade rooms, 20% second floor rooms, and 10% third floor rooms; For school
opened between 1 July 1994 and 30 June 1999 must test 100% first floor; For school opened or
structurally changed since 1 July 1999, 20% of ground contact rooms must be tested. c : School
districts that receive health and safety revenue to conduct radon testing must take re-test after
corrective measures that reduce radon levels. d : School should review geological potential for radon
and to decide if test is necessary. Radon testing is only required for public schools located in Radon
Zone 1. e : Statewide radon testing in school must be completed on or before 1 January 2021. f : If
initial testing is ≤4 pCi/L, 10% of the areas must be re-tested 3 years after; A different 10% of the
building must be tested every 3 years thereafter.
3.2. State Test Results Dissemination Requirements
State statutes and code regulations also differ in the dissemination of radon testing
results to the public. For example, a Colorado statute requires all schools to test for
radon and to maintain records of the test results for disclosure on request. In other
words, schools in Colorado are not required to share test results with the state
agency that regulates radon tests in schools; nor are they required to report the
results to teachers or parents [24], unless such request were made.
A nationwide policy is therefore essential to mandate radon test reports to be
submitted to a designated state regulatory agency, to be disseminated to parents,
other interested parties and the district school board members, as well as to make
the results available on the school’s or district’s website. In Connecticut, for
8